Research Activity (2012-2016)






[2016]


投稿論文(Publications)

“Ce 4f electronic states of CeO1-xFxBiS2 studied by soft x-ray photoemission spectroscopy”
T. Wakita, K. Terashima, T. Hamada, H. Fujiwara, M. Minohara, M. Kobayashi, K. Horiba, H. Kumigashira, G. Kutluk, M. Nagao, S. Watauchi, I. Tanaka, S. Demura, H. Okazaki, Y. Takano, Y. Mizuguchi, O . Miura, K. Okada, Y. Muraoka, T. Yokoya,
Phys. Rev. B 95, 085109(1-9) (2017).

Synchrotron powder X-ray diffraction and structural analysis of Eu0.5La0.5FBiS2-xSex
K. Nagasaka, G. Jinno, O. Miura, A. Miura, C. Moriyoshi, Y. Kuroiwa, Y. Mizuguchi
arXiv:1701.07575 (to appear in ISS2016 proceedings)
M2の長坂君の成果です!

Thermoelectric properties of new Bi-chalcogenide layered compounds
Y. Mizuguchi, A. Nishida, A. Omachi, O. Miura
Cogent Physics 3 (1), 1156281 (2016)

Discovery of BiS2-Based Superconductor and Material Design Concept
Y. Mizuguchi, Condens. Matter 2, 6 (2017)

Evolution of Eu valence and superconductivity in layered Eu0.5La0.5FBiS2-xSex system
Y. Mizuguchi, E. Paris, T. Wakita, G. Jinno, A. Puri, K. Terashima, B. Joseph, O. Miura, T. Yokoya, N. L. Saini
Phys. Rev. B 95, 064515 (2017)

Bulk Superconductivity Induced by In-Plane Chemical Pressure Effect in Eu0. 5La0. 5FBiS2?xSex
G. Jinno, R. Jha, A. Yamada, R. Higashinaka, T. D. Matsuda, Y. Aoki, M. Nagao, O. Miura, Y. mizuguchi
Journal of the Physical Society of Japan 85 (12), 124708 (2016)
4年生の陣野君の成果です!

Ferro-lattice-distortions in Bismuth Sulfide Superconductors
A. Athauda, D. Louca, C. Hoffman, Y. Ren, X. Zhu, S. Aswartham, J. Terzic, G. Cao, Y. Mizuguchi, O. Miura, K. Deguchi, Y. Takano, M. Nagao
Bulletin of the American Physical Society 61 (2016)

Electronic Origins of Large Thermoelectric Power Factor of LaOBiS2?x Se x A Nishida, H Nishiate, CH Lee, O Miura, Y Mizuguchi Journal of the Physical Society of Japan 85 (7), 074702 (2016)
M1の西田君の成果です!

Specific Heat and Electrical Transport Properties of Sn0.8Ag0.2Te Superconductor
Y. Mizuguchi, A. Yamada, R. Higashinaka, T. D. Matsuda, Y. Aoki, O. Miura, M. Nagao
Journal of the Physical Society of Japan 85 (10), 103701 (2016)

Discovery of new BiCh2-based layered superconductor Sr0.5La0.5FBiSe2 and anomalous insulating states competing with superconductivity
Y. Mizuguchi
Superconductor Science and Technology 29 (7), 070501 (2016)

Compositional and temperature evolution of crystal structure of new thermoelectric compound LaOBiS2?xSex
Y. Mizuguchi, A. Miura, A. Nishida, O. Miura, K. Tadanaga, N. Kumada, C. H. Lee, E. Magome, C. Moriyoshi, Y. Kuroiwa
Journal of Applied Physics 119 (15), 155103 (2016)

High-Pressure Synthesis and Superconductivity of Ag-Doped Topological Crystalline Insulator SnTe (Sn1?xAgxTe with x= 0?0.5)
Y. Mizuguchi, O. Miura
Journal of the Physical Society of Japan 85 (5), 053702 (2016)

Crystal structure instability of FeSe grains: Formation of non-superconducting phase at the grain surface
H. Izawa, Y. Tanaka, Y. Mizuguchi, O. Miura
Japanese Journal of Applied Physics 55 (5), 053101 (2016)

Crystal Structure, Electronic Structure, and Photocatalytic Activity of Oxysulfides: La2Ta2ZrS2O8, La2Ta2TiS2O8, and La2Nb2TiS2O8
Y. Goto, J. Seo, K. Kumamoto, T. Hisatomi, Y. Mizuguchi, Y. Kamihara, M. Katayama, T. Minegishi, K. Domen
Inorganic chemistry 55 (7), 3674-3679 (2016)

Correction to Structure, Superconductivity, and Magnetism of Ce(O,F)BiS2 Single Crystals
A. Miura, M. Nagao, T. Takei, S. Watauchi, Y. Mizuguchi, Y. Takano, I. Tanaka, N. Kumada
Crystal Growth & Design 16 (4), 2459-2459 (2016)

Structures and optical absorption of Bi2OS2 and LaOBiS2
A. Miura, Y. Mizuguchi, T. Takei, N. Kumada, E. Magome, C. Moriyoshi, Y. Kuroiwa, K. Tadanaga
Solid State Communications 227, 19-22 (2016)

Bulk sensitive angle-resolved photoelectron spectroscopy on Nd(O,F)BiS2
K. Terashima, J. Sonoyama, M. Sunagawa, H. Fujiwara, T. Nagayama, T. Muro, M. Nagao, S. Watauchi, I. Tanaka, H. Okazaki, Y. Takano, Y. Mizuguchi, H. Usui, K. Suzuki, K. Kuroki, T. Wakita, Y. Muraoka, T. Yokoya
Journal of Physics: Conference Series 683, 012003 (2016)

Comparative ARPES studies of LaOxF1?xBiS2 (x= 0.23 and 0.46)
K. Terashima, T. Wakita, M. Sunagawa, H. Fujiwara, T. Nagayama, K. Ono, H. Kumigashira, M. Nagao, S. Watauchi, I. Tanaka, H. Okazaki, Y. Takano, Y. Mizuguchi, H. Usui, K. Kuroki, Y. Muraoka, T. Yokoya
Journal of Physics: Conference Series 683, 012002 (2016)

Recent Advances in Layered Metal Chalcogenides as Superconductors and Thermoelectric Materials: Fe‐Based and Bi‐Based Chalcogenides
Y. Mizuguchi
The Chemical Record 16, 633 (2016)

Superconductivity phase diagram of Se-substituted CeO0.5F0.5Bi(S1-xSex)2
Y. Mizuguchi, T. Hiroi, O. Miura
Journal of Physics: Conference Series 683, 012001 (2016)



学会発表(Conferences)

“BiS2系層状化合物における超伝導 −局所構造制御の重要性−”
水口佳一,広島大・第500回物性セミナー(口頭発表)(広島大,2017年1月11日)

“Bulk superconductivity induced by in-plane chemical pressure effect in the Eu0.5La0.5FBiS2-xSex system”
G. Jinno, R. Jha, A. Yamada, R. Higashinaka, T. D. Matsuda, Y. Aoki, M. Nagao, O. Miura, Y. Mizuguchi, ISS2016, PC6-4(口頭発表)(東京国際フォーラム,2016年12月13-15日).

"Evolution of superconductivity and metallic conductivity by chemical pressure effect in REO0.5F0.5BiCh2 superconductors"
K. Nagasaka, O. Miura, Y. Mizuguchi, ISS2016, PCP2-18(ポスター)(東京国際フォーラム,2016年12月13-15日).

“How to cook new BiS2-based superconductors with a higher Tc”
Y. Mizuguchi, IWSRFM 2016 (口頭発表) (NIMS, 2016年12月20-22日)

“High thermoelectric performance in BiS2-based LaOBiCh2”
A. Nishida, IWSRFM 2016 (口頭発表) (NIMS, 2016年12月20-22日)

“Enhancement of Tc by Bi substitution in AgSn1-xBixSe2”
Y. Hijikata, , IWSRFM 2016 (口頭発表) (NIMS, 2016年12月20-22日)

“BiS2系層状化合物における超伝導と高熱電性能の発現条件”
水口佳一,TMUシンポジウム「U系およびBiS2系の物理の最近の発展」 (招待講演) (首都大学東京南大沢キャンパス,2016年11月28日)

"BiCh2系層状化合物LaOBiS2-xSexの熱電物性と結晶構造"
水口佳一, 西田篤弘, 三浦大介, 三浦章, 西当弘隆, 李哲虎, 日本物理学会2016年秋季大会,15-pJD-8 (口頭発表), (金沢大学角間キャンパス,2016年9月13-16日)

“RE(O,F)BiS2超伝導体における化学圧力と輸送特性の相関”
長坂康平,三浦大介,水口佳一,日本物理学会2016年秋季大会,14aPS-132 (ポスター), (金沢大学角間キャンパス,2016年9月13-16日)

“LaOBiS2-xSexにおける熱電性能向上の起源”
熱電学会2016年学術講演会, S4B5(口頭発表)(2016年9月5-7日,東京理科大葛飾キャンパス)

“岩塩型構造を有する新しい Bi カルコゲナイドの探索”
水口佳一,新学術領域J-Physics領域会議,P-12(ポスター)(2016年5月26-28日,北海道大学)



学外実験

水口,西田,R. Jha(青木研):SPring-8 BL02B2 (2016年9月)

水口,西田:J-PARC BL14 (2016年5月)

水口:ALBA(2016年7月) & ESRF(2016年7月)



国際交流



水口:ローマ大学招聘研究員(7月〜8月)







[2015]

投稿論文(Publications)

Bulk sensitive angle-resolved photoelectron spectroscopy on Nd(O,F)BiS2
K Terashima, J Sonoyama, M Sunagawa, H Fujiwara, T Nagayama, T Muro, M Nagao, S Watauchi, I Tanaka, H Okazaki, Y Takano, Y Mizuguchi, H Usui, K Suzuki, K Kuroki, T Wakita, Y Muraoka, T Yokoya
Journal of Physics: Conference Series 683 (2016) 012003

Comparative ARPES studies of LaOxF1-xBiS2 (x= 0.23 and 0.46)
K Terashima, T Wakita, M Sunagawa, H Fujiwara, T Nagayama, K Ono, H Kumigashira, M Nagao, S Watauchi, I Tanaka, H Okazaki, Y Takano, Y Mizuguchi, H Usui, K Kuroki, Y Muraoka, T Yokoya
Journal of Physics: Conference Series 683 (2016) 012002

Recent Advances in Layered Metal Chalcogenides as Superconductors and Thermoelectric Materials: Fe‐Based and Bi‐Based Chalcogenides
Y Mizuguchi
The Chemical Record, in printing

Superconductivity phase diagram of Se-substituted CeO0.5F0.5Bi(S1-xSex)2
Y. Mizuguchi, T. Hiroi, O. Miura
Journal of Physics: Conference Series 683 (2016) 012001

Structural Difference in Superconductive and Nonsuperconductive BiS Planes within Bi4O4Bi2S4 Blocks
Akira Miura, Yoshikazu Mizuguchi, Tsuyoshi Sugawara, Yongming Wang, Takahiro Takei, Nobuhiro Kumada, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa, Osuke Miura, Kiyoharu Tadanaga
Inorg. Chem., 2015, 54 (21), pp 10462-10467

Crystal Structure, Electronic Structure, and Photocatalytic Activity of Oxysulfides: La2Ta2ZrS2O8, La2Ta2TiS2O8, and La2Nb2TiS2O8
Yosuke Goto, Jeongsuk Seo, Kazunori Kumamoto, Takashi Hisatomi, Yoshikazu Mizuguchi, Yoichi Kamihara, Masao Katayama, Tsutomu Minegishi, Kazunari Domen
Inorg. Chem., 2016, 55 (7), pp 3674-3679

Structures and optical absorption of Bi2OS2 and LaOBiS2
Akira Miura, Yoshikazu Mizuguchi, Takahiro Takei, Nobuhiro Kumada, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa, Kiyoharu Tadanaga
Solid State Communications 227, 19-22 (2016)

Thermoelectric properties of new Bi-chalcogenide layered compounds
Y Mizuguchi, A Nishida, A Omachi, O Miura
Cogent Physics, in printing (arXiv:1602.05320)

The effect of RE substitution in layered REO0.5F0.5BiS2: chemical pressure, local disorder and superconductivity
Y. Mizuguchi, E. Paris, T. Sugimoto, A. Iadecola, J. Kajitani, O. Miura, T. Mizokawa and N. L. Saini
Phys.Chem.Chem.Phys., 2015, 17, 22090

High thermoelectric performance and low thermal conductivity of densified LaOBiSSe
Atsuhiro Nishida, Osuke Miura, Chul-Ho Lee, Yoshikazu Mizuguchi
Applied Physics Express 8, 111801(1-3) (2015)

Structures and Optical Properties of Bi2OS2 and LaOBiS2
Akira Miura, Yoshikazu Mizuguchi, Takahiro Takei, Nobuhiro Kumada, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa, Kiyoharu Tadanaga
Solid State Communications 227 (2016) 19-22

Pronounced - Log T Divergence in Specific Heat of Nonmetallic CeOBiS$_2$: A Mother Phase of BiS$_2$-Based Superconductor
Ryuji Higashinaka, Takuya Asano, Takuya Nakashima, Kengo Fushiya, Yoshikazu Mizuguchi, Osuke Miura, Tatsuma D. Matsuda, Yuji Aoki
Journal of the Physical Society of Japan 84, 023702 (2015)

ReviewofsuperconductivityinBiS2-based layeredmaterials
Y. Mizuguchi
Journal ofPhysicsandChemistryofSolids84(2015)34-48

Electrical and Thermal Transport of Layered Bismuth-chalcogenide EuBiS2F at temperatures between 300 and 623 K
Yosuke Goto, Joe Kajitani, Yoshikazu Mizuguchi, Yoichi Kamihara, Masanori Matoba
J. Phys. Soc. Jpn. 84, 085003 (2015)

In-plane chemical pressure essential for superconductivity in BiCh2-based (Ch: S, Se) layered structure
Yoshikazu Mizuguchi, Akira Miura, Joe Kajitani, Takafumi Hiroi, Osuke Miura, Kiyoharu Tadanaga, Nobuhiro Kumada, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa
Sci. Rep. 5, 14968 (2015)

In-plane Charge Fluctuations in Bismuth Sulfide Superconductors
Anushika Athauda, Junjie Yang, Seunghun Lee, Yoshikazu Mizuguchi, Keita Deguchi, Yoshihiko Takano, Osuke Miura, Despina Louca
Phys. Rev. B 91, 144112

Direct observation of nanoscale interface phase in the superconducting chalcogenide K$_{x}$Fe$_{2-y}$Se$_2$ with intrinsic phase separation
A. Ricci, N. Poccia, B. Joseph, D. Innocenti, G. Campi, A. Zozulya, F. Westermeier, A. Schavkan, F. Coneri, A. Bianconi, H. Takeya, Y. Mizuguchi, Y. Takano, T. Mizokawa, M. Sprung, N.L. Saini
Phys. Rev. B 91, 020503(R) (2015)


Anderson's impurity-model analysis on CeO1-xFxBiS2
Takuya Sugimoto, Boby Joseph, Eugenio Paris, Antonella Iadecola, Satoshi Demura, Yoshikazu Mizuguchi, Yoshihiko Takano, Takashi Mizokawa, and Naurang L. Saini
Journal of Physics: Conference Series 592 (2015) 012073

物性物理学のスリルにひかれて
水口佳一
パリティ‐コラム

層状硫化ビスマス化合物の超伝導体・熱電材料への応用
水口佳一
ケミカルエンジニアリング

層状ビスマスカルコゲナイドを舞台にした新しい熱電変換材料の開発
水口佳一
日本熱電学会誌,12,6-8 (2015)

学会発表(Conferences)

日本物理学会第71回年次大会,東北学院大,3月,水口(口頭発表)
"BiS2系超伝導体REO0.5F0.5BiS2-xSexにおけるSe置換効果", 22aBN-1, 水口佳一

SIS2016,山形,1月,水口(口頭発表),西田(口頭発表)
"層状ビスマカルコゲナイドにおける新物質・新機能のデザイン", 水口佳一
"BiCh2系熱電変換材料の開発", 西田篤弘

ISS2015,東京,11月,水口(口頭発表),井澤(ポスター),廣井(ポスター),長坂(ポスター)
"Determination of crystal structure parameter important for the emergence of superconductivity in the BiCh2 family", PC-8, Y. Mizuguchi
"Enhancement of Superconducting Properties in Iron-Chalcogenide Tapes using a PIT Process", WTP-24, Hiroki Izawa, Yoshikazu Mizuguchi, Osuke Miura
"Crystal Structure and Superconducting Properties of RE(O,F)BiS2 (RE: Ce, Nd, Sm)", PCP-19 ,Kouhei Nagasaka, Takafumi Hiroi, Joe Kajitani, Osuke Miura, Yoshikazu Mizuguchi
"Tuning of Superconductivity by Isovalent Substitution of Both RE and Ch Sites in REO0.5F0.5BiCh2 (RE=La, Ce, Nd; Ch=S, Se)", PCP-20, T. Hiroi, K. Nagasaka, O. Miura, Y. Mizuguchi

第9回物性科学領域横断研究会 凝縮系科学の最前線,11月,東大本郷,水口(ポスター),西田(ポスター)
"層状ビスマスカルコゲナイドにおける超伝導と高熱電性能", P-33, 水口佳一
"LaOBiS2-xSexの熱電特性", P-40, 西田篤弘

TMU国際シンポジウム(研究環),9月,首都大,水口(招待講演),廣井(ポスター),長坂(ポスター)
"Correlation between crystal structure and superconductivity of BiCh2-based layered superconductors", 24A4, Y. Mizuguchi
"Crystal structure and superconducting properties of RE(O,F)BiS2 (RE: La, Ce, Pr, Nd, Sm)", P-5, K. Nagasaka
"Element substitution effects of superconducting layer in BiS2 based superconductor REO0.5F0.5BiS2 (RE: La, Ce, Nd)", P-9, T. Hiroi

セラミックス協会,9月,富山大学,水口(招待講演)
"層状ビスマスカルコゲナイド超伝導体", 3F-17, 水口佳一

新学術領域J-Physicsキックオフミーティング,9月,神戸大学,水口(口頭発表)
"層状ビスマスカルコゲナイド超伝導体の開拓と今後の展望", 水口佳一

日本熱電学会,九州大学,9月,西田(口頭発表),水口(口頭発表;講演奨励賞)
"新しい層状ビスマスカルコゲナイドの熱電特性", S3B-4, 水口佳一
"緻密化したLaOBiS2-xSex の高い熱電特性と低い熱伝導率", S3B-5, 西田篤弘,三浦大介,水口佳一

M2S (Materials and Mechanisms of Superconductivity),8月,ジュネーブ,水口(ポスター),井澤(ポスター)
"Relationship between superconducting property and crystal structure in BiS2-based superconductors", E-006, Y. Mizuguchi
"Superconducting properties of FeTe1-xSex and AxFe2-ySe2 wires and tapes by a PIT process", L004, H. Izawa

Gordon Research Conference, 香港,5月,水口(招待講演)
"Superconductivity in Bi-based layered chalcogenides", Y. Mizuguchi








[2014]

投稿論文(Publications)

“Chemical pressure effect on Tc in BiS2-based Ce1-xNdxO0.5F0.5BiS2”
J. Kajitani, A. Omachi, T. Hiroi, O. Miura, Y. Mizuguchi
Physica C 504, 33-35

“Stabilization of high-Tc phase of BiS2-based superconductor LaO0.5F0.5BiS2 using high-pressure synthesis”
Y. Mizuguchi, T. Hiroi, J. Kajitani, H. Takatsu, H. Kadowaki, O. Miura
J. Phys. Soc. Jpn. 83, 053704(1-4)

“Superconductivity in layered chalcogenides”
Y. Mizuguchi
Wiley Encyclopedia of Electrical and Electronics Engineering, 1-13(オンライン書籍)

“Anisotropic upper critical field of BiS2-based superconductor LaO0.5F0.5BiS2”
Y. Mizuguchi, A. Miyake, K. Akiba, M. Tokunaga, J. Kajitani, O. Miura
Phys. Rev. B 89, 174515(1-7)

“Enhancement of Tc by uniaxial lattice contraction in BiS2-based superconductor PrO0.5F0.5BiS2”
J. Kajitani, K. Deguchi, T. Hiroi, A. Omachi, S. Demura, Y. Takano, O. Miura, Y. Mizuguchi
J. Phys. Soc. Jpn. 83, 065002(1-2)

“Role of the Ce valence in the coexistence of superconductivity and ferromagnetism of CeO1-xFxBiS2 revealed by Ce L3-edge x-ray absorption spectroscopy”
T. Sugimoto, B. Joseph, E. Paris, A. Iadecola, T. Mizokawa, S. Demura, Y. Mizuguchi, Y. Takano, N. L. Saini
Phys. Rev. B 89, 201117(1-5)

“Pressure-induced Enhancement of Superconductivity in BiS2-layered LaO1-xFxBiS2”
T. Tomita, M. Ebata, H. Soeda, H. Takahashi, H. Fujihisa, Y. Gotoh, Y. Mizuguchi, H. Izawa, O. Miura, S. Demura, K. Deguchi, Y. Takano
J. Phys. Soc. Jpn. 83, 063704(1-4)

“Discovery of New Layered Phosphide-Chalcogenide Superconductors”
Y. Mizuguchi
JPSJ News and Comments 11, 9 (1-2)

“Effect of high pressure annealing on the normal state transport of LaO0.5F0.5BiS2”
I. Pallecchi, G. Lamura, M. Putti, J. Kajitani, Y. Mizuguchi, O. Miura, S. Demura, K. Deguchi, Y. Takano
Phys. Rev. B 89, 214513(1-6)

“Low-Temperature Enhancement in the Upper Critical Field of Underdoped LaO1-xFxBiS2 (x = 0.1-0.3)”
R. Higashinaka, R. Miyazaki, Y. Mizuguchi, O. Miura, Y. Aoki
J. Phys. Soc. Jpn. 83, 075004(1-2)

“Spectromicroscopy of electronic phase separation in KxFe2-ySe2 superconductor”
M. Bendele, A. Barinov, B. Joseph, D. Innocenti, A. Iadecola, A. Bianconi, H. Takeya, Y. Mizuguchi, Y. Takano, T. Noji, T. Hatakeda, Y. Koike, M. Horio, A. Fujimori, D. Ootsuki, T. Mizokawa, N. L. Saini
Sci. Rep. 4, 5592(1-5)

“Superconductivity in BiS2-Based Layered Compounds”
Y. Mizuguchi
Phys. Procedia 58, 94-97

"Enhancement of thermoelectric properties by Se substitution in layered bismuth-chalcogenide LaOBiS2-xSex"
Y. Mizuguchi, A. Omachi, Y. Goto, Y. Kamihara, M. Matoba, T. Hiroi, J. Kajitani, O. Miura
J. Appl. Phys. 116, 163915(1-4)

“Checkerboard stripe electronic state on cleaved surface of NdO0.7F0.3BiS2 probed by scanning tunneling microscope”
T. Machida, Y. Fujisawa, M. Nagao, S. Demura, K. Deguchi, Y. Mizuguchi, Y. Takano, H. Sakata
J. Phys. Soc. Jpn. 83, 113701(1-5)

"Determination of local atomic displacements in CeO1-xFxBiS2 system"
E. Paris, B. Joseph, A. Iadecola, T. Sugimoto, L. Olivi, S. Demura, Y. Mizuguchi, Y. Takano, T. Mizokawa, N. L. Saini
J. Phys.: Condens. Matter 26, 435701(1-6)

“X-ray absorption and photoemission spectroscopy of electronic phase separation in KxFe2-ySe2”
N. L. Saini, T. Mizokawa, E. Magnano, S. Nappini, F. Bondino, H. Takeya, Y. Mizuguchi, Y. Takano, K. B. Garg
Phys. Rev. B 90, 184510(1-6)

“Increase in Tc and Change of Crystal Structure by High-Pressure Annealing in BiS2-Based Superconductor CeO0.3F0.7BiS2”
J. Kajitani, T. Hiroi, A. Omachi, O. Miura, Y. Mizuguchi
J. Supercond. Novel Mag. Accepted (in printing)

“Element Substitution Effect on Superconductivity in BiS2-Based NdO1-xFxBiS2”
T. Hiroi, J. Kajitani, A. Omachi, O. Miura, Y. Mizuguchi
J. Supercond. Novel Mag. Accepted (in printing)

“Coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2”
S. Demura, K. Deguchi, Y. Mizuguchi, K. Sato, R. Honjyo, A. Yamashita, T. Yamaki, H. Hara, T. Watanabe, S. J. Denholme, M. Fujioka, H. Okazaki, T. Ozaki, O. Miura, T. Yamaguchi, H. Takeya, Y. Takano
J. Phys. Soc. Jpn. Accepted (in printing)

“Evolution of superconductivity in BiS2-based superconductor LaO0.5F0.5Bi(S1-xSex)2”
T. Hiroi, J. Kajitani, A. Omachi, O. Miura and Y. Mizuguchi
J. Phys. Soc. Jpn. 84, 024723 (2015)



学会発表(Conferences)

“Novel Superconductors with BiS2-Based Layered Structure”,ICSM2014,Yoshikazu Mizuguchi,2014年4月

“Correlation of the crystal structure and superconducting property in BiS2-based superconductor”,ICSM2014,Joe Kajitani,2014年4月

“Evaluating superconducting characteristics and element substitution effect of NdO1-xFxBiS2”,ICSM2014,Takafumi Hiroi,2014年4月

“構造相変態PIT法による鉄カルコゲナイド系超伝導線材の高臨界電流密度化”,2014年度春季低温工学・超電導学会,井澤宏輝,2014年5月

“BiS2系、BiSe2系超伝導体の最新情報と可能性”,超伝導科学技術研究会第84回ワークショップ,水口佳一,2014年7月

“ビスマスカルコゲナイド超伝導体”,SSS2014,水口佳一,2014年8月

“BiS2 系超伝導体の超伝導層元素置換効果”,SSS2014,廣井貴史,2014年8月

“Enhancement of critical current density of Fe-chalcogenide wires and tapes using chemical phase transformation PIT process”,Applied Superconductivity Conference 2014,Hiroki Izawa,2014年8月

“BiS2系超伝導体の結晶構造と超伝導特性の相関”,日本物理学会平成26年度秋季大会,梶谷丈,2014年9月

“Superconductivity in layered bismuth chalcogenides”,SuperFox2014,Yoshikazu Mizuguchi,2014年9月

“BiS2系超伝導体の結晶構造と超伝導特性の相関”,首都大学東京研究環「特異な結晶構造に創出する新奇量子相の解明」第2回研究会,梶谷丈,2014年9月

“構造相変態PIT法により作製した鉄カルコゲナイド線材の超伝導特性評価”,2014年度秋季低温工学・超電導学会,井澤宏輝,2014年11月

“Fabrication of KxFe2-y(Se1-zSz)2Superconducting Tapes by a Chemical-Phase-Transformation PIT”,ISS2014,Hiroki Izawa,2014年11月

“Chemical pressure effect on superconductivity of BiS2-based Ce1-xNdxO1-yFyBiS2 and Nd1-zSmzO1-yFyBiS2”,ISS2014,Joe Kajitani,2014年11月

“Element substitution effects of superconducting layer in BiS2 based superconductor REO0.5F0.5BiS2 (RE = La, Nd)”,ISS2014,Takafumi Hiroi,2014年11月







[2013]

投稿論文(Publications)

“Enhancement of Tc by uniaxial lattice contraction in BiS2-based superconductor PrO0.5F0.5BiS2”
J. Kajitani, K. Deguchi, T. Hiroi, A. Omachi, S. Demura, Y. Takano, O. Miura, Y. Mizuguchi
J. Phys. Soc. Jpn., in printing. (arXiv:1401.7506)


“Superconductivity in layered chalcogenides”
Y. Mizuguchi, Wiley Encyclopedia of Electrical and Electronic Engineering, in printing.


“Stabilization of high-Tc phase of BiS2-based superconductor LaO0.5F0.5BiS2 using high-pressure synthesis”
Y. Mizuguchi, T. Hiroi, J. Kajitani, H. Takatsu, H. Kadowaki, O. Miura
J. Phys. Soc. Jpn., in printing. (arXiv:1402.5189)


“High-temperature thermoelectric properties of novel layered bismuth-sulfide LaO1-xFxBiS2”
A. Omachi, J. Kajitani, T. Hiroi, O. Miura, Y. Mizuguchi
J. Appl. Phys. 115, 083909 (2014).


“Importance of uniaxial compression for the appearance of superconductivity in NdO1-xFxBiS2”
A. Omachi, T. Hiroi, J. Kajitani, O. Miura, Y. Mizuguchi
J. Phys.: Conf. Ser., in printing.


“Chemical pressure effect on Tc in BiS2-based Ce1-xNdxO0.5F0.5BiS2”
J. Kajitani, A. Omachi, T. Hiroi, O. Miura, Y. Mizuguchi
Physica C, in printing (arXiv:1311.4272).


“Superconductivity in BiS2-Based Layered Compounds”
Y. Mizuguchi, Phys. Procedia, in printing (arXiv:1311.4270).


“Correlation between crystal structure and superconductivity in LaO0.5F0.5BiS2”
J. Kajitani, K. Deguchi, A. Omachi, T. Hiroi, Y. Takano, H. Takatsu, H. Kadowaki, O. Miura, Y. Mizuguchi
Solid State Commun. 181, 1 (2014).


"Crystal Structure, Lattice Vibrations, and Superconductivity of LaO1-xFxBiS2"
J. Lee, M. B. Stone, A. Huq, T. Yildrim, G. Ehlers, Y. Mizuguchi, O. Miura, Y. Takano, K. Deguchi, S. Demura, S.-H. Lee
Phys. Rev. B 87, 205134 (2013)


“Checkerboard stripe electronic state on cleaved surface of NdO0.7F0.3BiS2 probed by scanning tunneling microscope”
T. Machida, Y. Fujisawa, M. Nagao, S. Demura, K. Deguchi, Y. Mizuguchi, Y. Takano, H. Sakata
arXiv:1403.6110 (submitted).


“Soft x-ray photoemission study of new BiS2-layered superconductor LaO1-xFxBiS2”
S. Nagira, J. Sonoyama, T. Wakita, M. Sunagawa, Y. Izumi, T. Muro, H. Kumigashira, M. Oshima, K. Deguchi, H. Okazaki, Y. Takano, O. Miura, Y. Mizuguchi, K. Suzuki, H. Usui, K. Kuroki, K. Okada, Y. Muraoka, T. Yokoya
J. Phys. Soc. Jpn. 83, 033703 (2014).


“Coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2”
S. Demura, K. Deguchi, Y. Mizuguchi, K. Sato, R. Honjyo, A. Yamashita, T. Yamaki, H. Hara, T. Watanabe, S. J. Denholme, M. Fujioka, H. Okazaki, T. Ozaki, O. Miura, T. Yamaguchi, H. Takeya, Y. Takano
arXiv:1311.4267 (submitted).


“s-wave pairing in the optimally-doped LaO0.5F0.5BiS2 superconductor”
G. Lamura, T. Shiroka, P. Bonfa, S. Sanna, R. De Renzi, C. Baines, H. Luetkens, J. Kajitani, Y. Mizuguchi, O. Miura, K. Deguchi, S. Demura, Y. Takano, M. Putti
Phys. Rev. B 88, 180509 (2013).


“Pressure-induced Enhancement of Superconductivity in BiS2-layered LaO1-xFxBiS2”
T. Tomita, M. Ebata, H. Soeda, H. Takahashi, H. Fujihisa, Y. Gotoh, Y. Mizuguchi, H. Izawa, O. Miura, S. Demura, K. Deguchi, Y. Takano
J. Phys. Soc. Jpn., in printing. (arXiv:1312.3380)


“Angular dependence of the resistive upper critical field of the iron-based superconductor Fe1+δ(Te,Se) in high magnetic fields”
T. Kida, M. Hagiwara, Y. Mizuguchi, Y. Takano
Journal of the Korean Physical Society 62, 1997 (2013).


“Observation of an isosceles triangular electronic structure around the excess iron atoms in Fe1+δTe”
T. Machida, K. Kogure, T. Kato, H. Nakamura, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, H. Sakata
Phys. Rev. B 87, 214508 (2013).


学会発表(Conferences)

◆応用物理学会超伝導分科会研究会: 7/5, ISTEC,東京

水口(招待講演)
"BiS2系新超伝導体〜 Tc上昇の鍵は? 〜"


◆2013年春季低温工学・超伝導学会 5/13-15 東京 江戸川区タワーホール船堀

井澤, 1P-p10
"構造相変態PIT法によるFeSeTe超伝導線材の作成"


◆MT23: , Boston, USA: 7/14-19

井澤
"Fabrication of Fe chalcogenide superconducting wire and tape using a chemical-transformation PIT process"


◆EUCAS2013: 9/15-19, Genova, Italy

濱田
"EXECESS Fe CONCENTRATION CAN TUNE THE ANISOTROPY OF SUPERCONDUCTIVITY", 1P-MA4-03

水口
"Physical properties of BiS2-based layered superconductors", 1A-MA-O1


◆LEMSUPER: 9/24-26, Trieste, Italy

水口(招待講演)
"Structural variations and physical properties of BiS2-based layered superconductors"


◆日本物理学会秋季大会 9/26 徳島大

大町 28aEC-2
"NdO1-xFxBiS2の物性と焼成温度の相関関係 (NdO1-xFxBiS2の物性と焼成温度の相関関係)" 

梶谷 28aEC-3
"Bi-O-S系多結晶試料の合成と超伝導特性の評価"


◆基研研究会 10/8-9 京都大学

水口(招待講演)
"新しいBiS2系層状超伝導体"


◆ISS2013 11/18-20 江戸川区タワーホール船堀

水口(招待講演) PC-3-INV
"Discovery of BiS2-based new superconductors "

梶谷 PCP-41
"Correlation between crystal structure and superconductivity"

廣井 PCP-39
"Synthesis and superconducting properties of poly and single Crystal of NdO1-xFxBiS2"

井澤 WTP-47
"Fabrication of FeTe1-xSex superconducting wires and teapes by a chemical-transformation PIT process"


◆NS2-2013 11/21-22 グランドール 品川

水口
"Superconductivity in the Novel BiS2-Based Layered compounds"


◆2013年度秋季低温工学・超伝導学会 12/4-6

井澤  3D-p02
"構造相変態PIT法によるFe(Te, Se)超電導テープの作製と特性評価"


◆物理学会 3/27-29 東海大学

水口(シンポジウム講演) 28pBE-2
"BiS2系層状超伝導体の結晶構造と超伝導体"

水口  29pCG-6
"BiS2系層状化合物La1-xCexOBiS2の結晶構造と物性"

梶谷 29pCG-7
"BiS2系超伝導体REO1-xFxBiS2の化学圧力効果"

廣井 27pPSA-76
"BiS2系超伝導体NdO1-xFxBiS2の元素置換効果"


◆SIS2014(低温工学交流事業主催の研究会) 3/2-4 シャレー志賀(長野)

水口
"High pressure synthesis of BiS2-based superconductors"

井澤
"Fabrication of K-Fe-Se superconducting wires"

梶谷
"Chemical and external pressure effect on superconductivity of REOBiS2 systems"

廣井
"Evaluating superconducting characteristics and element substitution effect of NdO1-xFaBiS2"


◆超伝導研究会 3/26 首都大学東京 (水口が主催しました)

梶谷
"BiS2系超伝導体の超伝導特性と結晶構造の相関"

廣井
"NdO1-xFxBiS2超伝導体の元素置換効果"

井澤
"鉄カルコゲナイド超伝導線材の特性向上"


平成25年度は学生さんたちが研究,論文執筆,学会発表をとても活発に行いました!
今後も期待しています!!







[2012]

投稿論文(Publications)
Kentaro Hamada, Yoshikazu Mizuguchi, Osuke Miura
"Tuning of superconducting anisotropy by controlling excess Fe concentration in FeyTe0.6Se0.4", accepted in phys. procedia.

J. Lee, M. B. Stone, A. Huq, T. Yildrim, G. Ehlers, Y. Mizuguchi, O. Miura, Y. Takano, K. Deguchi, S. Demura, S.-H. Lee
"Crystal Structure, Lattice Vibrations, and Superconductivity of LaO1-xFxBiS2", arXiv:1212.4811. Keita Deguchi, Yoshihiko Takano, Yoshikazu Mizuguchi
"Physics and chemistry review of layered chalcogenide superconductors", Sci. Technol. Adv. Mater. 13 (2012) 054303.

K. Deguchi, Y. Mizuguchi, S. Demura, H. Hara, T. Watanabe, S. J. Denholme, M. Fujioka, H. Okazaki, T. Ozaki, H. Takeya, T. Yamaguchi, O. Miura, Y. Takano
"Evolution of superconductivity in LaO1-xFxBiS2 prepared by high pressure technique", EPL 101 (2013) 17004.

Antonella Iadecola, Boby Joseph, Laura Simonelli, Alessandro Puri, Yoshikazu Mizuguchi, Hiroyuki Takeya, Yoshihiko Takano, Naurang Lal Saini
"Large local disorder in the superconducting K_{0.8}Fe_{1.6}Se_{2} studied by extended x-ray absorption fine structure", Journal of Physics: Condensed Matter 24, 115701 (2012)

Masashi Tokunaga, Takumi Kihara, Yoshikazu Mizuguchi, Yoshihiko Takano
"Inducement of superconductivity in Fe(Te,S) by sulfuric acid treatment", J. Phys. Soc. Jpn. 81, 085005 (2012).

H. Okazaki, T. Watanabe, T. Yamaguchi, Y. Kawasaki, K. Deguchi, S. Demura, T. Ozaki, S. J. Denholme, Y. Mizuguchi, H. Takeya, Y. Takano
"Evidence of Inhomogeneous Superconductivity in FeTe$_{1-x}$Se$_x$ Thin Film Using Scotch-Tape Method", arXiv:1205.2865 (2012).

Satoshi Demura, Hiroyuki Okazaki, Toshinori Ozaki, Hiroshi Hara, Yasuna Kawasaki, Keita Deguchi, Tohru Watanabe, Saleem James Denholme, Yoshikazu Mizuguchi, Takahide Yamaguchi, Hiroyuki Takeya, Yoshihiko Takano
"Electrodeposition as a new route to synthesize superconducting FeSe", J. Phys. Soc. Jpn. in printing.

Hisashi Kotegawa, Yusuke Tomita, Hideki Tou, Yoshikazu Mizuguchi, Hiroyuki Takeya, Yoshihiko Takano,
"Weak Spin Fluctuation with Finite Wave Vector and Superconducting Gap Symmetry in KxFe2-ySe2: 77Se Nuclear Magnetic Resonance", J. Phys. Soc. Jpn. 81 (2012) 104712.

L. Simonelli, N. L. Saini, M. Moretti Sala, Y. Mizuguchi, Y. Takano, H. Takeya, T. Mizokawa, G. Monaco
"Coexistence of different electronic phases in the K0.8Fe1.6Se2 superconductor: a bulk-sensitive hard x-rays spectroscopy study", Phys. Rev. B 85, 224510 (2012).

Yoshikazu Mizuguchi, Hiroshi Fujihisa, Yoshito Gotoh, Katsuhiro Suzuki, Hidetomo Usui, Kazuhiko Kuroki, Satoshi Demura, Yoshihiko Takano, Hiroki Izawa, Osuke Miura
"Novel BiS2-based layered superconductor Bi4O4S3", Physical Review B 86, 220510(R) (2012).

Yoshikazu Mizuguchi, Satoshi Demura, Keita Deguchi, Yoshihiko Takano, Hiroshi Fujihisa, Yoshito Gotoh, Hiroki Izawa, Osuke Miura
"Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2", J. Phys. Soc. Jpn. 81 (2012) 114725.

Satoshi Demura, Yoshikazu Mizuguchi, Keita Deguchi, Hiroyuki Okazaki, Hiroshi Hara, Tohru Watanabe, Saleem James Denholme, Masaya Fujioka, Toshinori Ozaki, Hiroshi Fujihisa, Yoshito Gotoh, Osuke Miura, Takahide Yamaguchi, Hiroyuki Takeya, Yoshihiko Takano
"BiS2 - based superconductivity in F-substituted NdOBiS2", arXiv:1207.5248.

H. Okazaki, T. Watanabe, T. Yamaguchi, K. Deguchi, S. Demura, S. J. Denholme, T. Ozaki, Y. Mizuguchi, H. Takeya, T. Oguchi, Y. Takano
"Fermiological Interpretation of Superconductivity/Non-superconductivity of FeTe_{1-x}Se_{x} Thin Crystal Determined by Quantum Oscillation Measurement", arXiv:1207.6578.

Hisashi Kotegawa, Yusuke Tomita, Hideki Tou, Hiroki Izawa, Yoshikazu Mizuguchi, Osuke Miura, Satoshi Demura, Keita Deguchi, Yoshihiko Takano
"Pressure Study of BiS2-Based Superconductors Bi4O4S3 and La(O,F)BiS2 ", J. Phys. Soc. Jpn. 81 (2012) 103702.

Hiroshi Takatsu, Yoshikazu Mizuguchi, Hiroki Izawa, Osuke Miura, Hiroaki Kadowaki
"Bulk superconductivity in Bi4O4S3 revealed by specific heat measurement", J. Phys. Soc. Jpn. 81 (2012) 125002.



学会発表(Conferences)


◆M2S-2012(Washingtong DC, USA)

H. Izawa, Y. Mizuguchi, O. Miura, T. Ozaki, Y. Takano
"SUPERCONDUCTING PROPERTIES OF FeSe WIRE AND TAPE FABRICATED BY CHEMICAL-TRANSFORMATION PIT PROCESS", P2-40, M2S 2012, Washington DC.
Y. Mizuguchi, K. Hamada, H. Izawa, O. Miura
"Physical properties of FeTe-based bulk and thin crystals", P2-42, M2S 2012, Washington DC.


◆磁気分離夏の学校(8/31-9/1, 東京):全員発表,運営


◆IUMRS-2012(9/24-9/28, Yokohama):井澤(口頭発表),水口(招待講演)

Y. Mizuguchi et al.
"Physical properties of layered chalcogenide superconductors and related magnetic materials", B-4-I24-004

H. Izawa, Y. Mizuguchi, T. Ozaki, Y. Takano, O. Miura
"Fabrication of FeSe wire by a novel chemical-transformation PIT process", B-4-O26-016


◆ISS2012(Funabori, Tokyo):2012.12.3-5

Yoshikazu Mizuguchi
"NOVEL BiS2-BASED LAYERED SUPERCONDUCTING FAMILY", PC-9

Kentaro Hamada, Yoshikazu Mizuguchi, Osuke Miura
"EXECESS Fe CONCENTRATION CAN TUNE THE ANISOTROPY OF SUPERCONDUCTIVITY IN Fe1+dTe0.6Se0.4 SINGLE CRYSTALS.", PCP-46

H. Izawa, Y. Mizuguchi, T. Ozaki, Y. Takano, O. Miura
"CRITICAL CURRENT DENSITIES OF FeTe1-xSex WIRES FABRICATED BY MODIFIED PIT PROCESS", WTP-55

◆SIS2013(長野県)水口(招待講演),井澤(口頭発表)


◆SMEC2013(Miami, USA):2013.3.23-30

Y. Mizuguchi
"Superconductivity in the novel BiS2-based layered materials", invited talk in session ISRFM.




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