Strong Electron Correlations in the Normal State of the Iron-Based FeSe0.42Te0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy

被引：179

作者：

Tamai, A. ^{[1
]}

Ganin, A. Y. ^{[2
]}

Rozbicki, E. ^{[1
]}

Bacsa, J. ^{[2
]}

Meevasana, W. ^{[1
]}

King, P. D. C. ^{[1
]}

Caffio, M. ^{[3
]}

Schaub, R. ^{[3
]}

Margadonna, S. ^{[4
]}

Prassides, K. ^{[5
]}

Rosseinsky, M. J. ^{[2
]}

Baumberger, F. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[2] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

[3] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland

[4] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

[5] Univ Durham, Dept Chem, Durham DH1 3LE, England

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 09期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

PNICTIDES;

D O I：

10.1103/PhysRevLett.104.097002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the normal state of the "11'' iron-based superconductor FeSe0.42Te0.58 by angle-resolved photoemission. Our data reveal a highly renormalized quasiparticle dispersion characteristic of a strongly correlated metal. We find sheet dependent effective carrier masses between approximate to 3 and 16m(e) corresponding to a mass enhancement over band structure values of m*/m(band) approximate to 6-20. This is nearly an order of magnitude higher than the renormalization reported previously for iron-arsenide superconductors of the "1111'' and "122'' families but fully consistent with the bulk specific heat.

引用

页数：4

共 36 条

[11] Superconductivity in the PbO-type structure α-FeSe [J].

Hsu, Fong-Chi ;

Luo, Jiu-Yong ;

Yeh, Kuo-Wei ;

Chen, Ta-Kun ;

Huang, Tzu-Wen ;

Wu, Phillip M. ;

Lee, Yong-Chi ;

Huang, Yi-Lin ;

Chu, Yan-Yi ;

Yan, Der-Chung ;

Wu, Maw-Kuen .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2008, 105 (38) :14262-14264

[12] Iron-based layered superconductor: LaOFeP [J].

Kamihara, Yoichi ;

Hiramatsu, Hidenori ;

Hirano, Masahiro ;

Kawamura, Ryuto ;

Yanagi, Hiroshi ;

Kamiya, Toshio ;

Hosono, Hideo .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (31) :10012-10013

[13]

LIU C, ARXIV09101799

[14] Electronic structure of the iron-based superconductor LaOFeP [J].

Lu, D. H. ;

Yi, M. ;

Mo, S. -K. ;

Erickson, A. S. ;

Analytis, J. ;

Chu, J. -H. ;

Singh, D. J. ;

Hussain, Z. ;

Geballe, T. H. ;

Fisher, I. R. ;

Shen, Z. -X. .

NATURE, 2008, 455 (7209) :81-84

[15] Evolution of spin excitations into the superconducting state in FeTe1-xSex [J].

Lumsden, M. D. ;

Christianson, A. D. ;

Goremychkin, E. A. ;

Nagler, S. E. ;

Mook, H. A. ;

Stone, M. B. ;

Abernathy, D. L. ;

Guidi, T. ;

MacDougall, G. J. ;

de la Cruz, C. ;

Sefat, A. S. ;

McGuire, M. A. ;

Sales, B. C. ;

Mandrus, D. .

NATURE PHYSICS, 2010, 6 (03) :182-186

[16] Pressure evolution of the low-temperature crystal structure and bonding of the superconductor FeSe (Tc=37 K) [J].

Margadonna, S. ;

Takabayashi, Y. ;

Ohishi, Y. ;

Mizuguchi, Y. ;

Takano, Y. ;

Kagayama, T. ;

Nakagawa, T. ;

Takata, M. ;

Prassides, K. .

PHYSICAL REVIEW B, 2009, 80 (06)

[17] Cleavage surfaces of the BaFe2-xCoxAs2 and FeySe1-xTex superconductors: A combined STM plus LEED study [J].

Massee, F. ;

de Jong, S. ;

Huang, Y. ;

Kaas, J. ;

van Heumen, E. ;

Goedkoop, J. B. ;

Golden, M. S. .

PHYSICAL REVIEW B, 2009, 80 (14)

[18]

MIYAKE T, ARXIV09113705V1, P65109

[19]

MOOK HA, ARXIV09042178

[20] Anomalous Suppression of the Orthorhombic Lattice Distortion in Superconducting Ba(Fe1-xCox)2As2 Single Crystals [J].

Nandi, S. ;

Kim, M. G. ;

Kreyssig, A. ;

Fernandes, R. M. ;

Pratt, D. K. ;

Thaler, A. ;

Ni, N. ;

Bud'ko, S. L. ;

Canfield, P. C. ;

Schmalian, J. ;

McQueeney, R. J. ;

Goldman, A. I. .

PHYSICAL REVIEW LETTERS, 2010, 104 (05)

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