Superconductivity pairing mechanism from cobalt impurity doping in FeSe: Spin (s±) or orbital (s++) fluctuation

被引：23

作者：

Urata, T. ^{[1
]}

Tanabe, Y. ^{[1
]}

Huynh, K. K. ^{[2
]}

Yamakawa, Y. ^{[3
]}

Kontani, H. ^{[3
]}

Tanigaki, K. ^{[1
,2
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[3] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 01期

基金：

日本学术振兴会;

关键词：

SINGLE-LAYER FESE;

D O I：

10.1103/PhysRevB.93.014507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In high-superconducting transition temperature (T-c) iron-based superconductors, interband sign reversal (s(+/-)) and sign preserving (s(++)) s-wave superconducting states have been primarily discussed as the plausible superconductingmechanism. We study Co impurity scattering effects on the superconductivity in order to achieve an important clue on the pairing mechanism using single-crystal Fe1-xCoxSe and depict a phase diagram of a FeSe system. Both superconductivity and structural transition/orbital order are suppressed by the Co replacement on the Fe sites and disappear above x = 0.036. These correlated suppressions represent a common background physics behind these physical phenomena in the multiband Fermi surfaces of FeSe. By comparing experimental data and theories so far proposed, the suppression of T-c against the residual resistivity is shown to be much weaker than that predicted in the case of general sign reversal and full gap s(+/-) models. The origin of the superconducting paring in FeSe is discussed in terms of its multiband electronic structure.

引用

页数：9

共 48 条

[1]

ABRIKOSOV AA, 1961, SOV PHYS JETP-USSR, V12, P1243

[2]

Baek SH, 2015, NAT MATER, V14, P210, DOI [10.1038/nmat4138, 10.1038/NMAT4138]

[3] Origin of the Tetragonal-to-Orthorhombic Phase Transition in FeSe: A Combined Thermodynamic and NMR Study of Nematicity [J].

Boehmer, A. E. ;

Arai, T. ;

Hardy, F. ;

Hattori, T. ;

Iye, T. ;

Wolf, T. ;

v Loehneysen, H. ;

Ishida, K. ;

Meingast, C. .

PHYSICAL REVIEW LETTERS, 2015, 114 (02)

[4] Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe [J].

Boehmer, A. E. ;

Hardy, F. ;

Eilers, F. ;

Ernst, D. ;

Adelmann, P. ;

Schweiss, P. ;

Wolf, T. ;

Meingast, C. .

PHYSICAL REVIEW B, 2013, 87 (18)

[5] Origin of nematic order in FeSe [J].

Chubukov, Andrey V. ;

Fernandes, Rafael M. ;

Schmalian, Joerg .

PHYSICAL REVIEW B, 2015, 91 (20)

[6] Multigap nodeless superconductivity in FeSex: Evidence from quasiparticle heat transport [J].

Dong, J. K. ;

Guan, T. Y. ;

Zhou, S. Y. ;

Qiu, X. ;

Ding, L. ;

Zhang, C. ;

Patel, U. ;

Xiao, Z. L. ;

Li, S. Y. .

PHYSICAL REVIEW B, 2009, 80 (02)

[7]

Fan Q, 2015, NAT PHYS, V11, P946, DOI [10.1038/nphys3450, 10.1038/NPHYS3450]

[8] What drives nematic order in iron-based superconductors? [J].

Fernandes, R. M. ;

Chubukov, A. V. ;

Schmalian, J. .

NATURE PHYSICS, 2014, 10 (02) :97-104

[9] Iron-based superconductors: Current status of materials and pairing mechanism [J].

Hosono, Hideo ;

Kuroki, Kazuhiko .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2015, 514 :399-422

[10] 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

← 1 2 3 4 5 →