Angle-resolved photoemission spectroscopy of superconducting LiFeAs: Evidence for strong electron-phonon coupling

被引：51

作者：

Kordyuk, A. A. ^{[1
,2
]}

Zabolotnyy, V. B. ^{[1
]}

Evtushinsky, D. V. ^{[1
]}

Kim, T. K. ^{[1
]}

Morozov, I. V. ^{[1
,3
]}

Kulic, M. L. ^{[4
]}

Follath, R. ^{[5
]}

Behr, G. ^{[1
]}

Buechner, B. ^{[1
]}

Borisenko, S. V. ^{[1
]}

机构：

[1] IFW Dresden, Inst Solid State Res, D-01171 Dresden, Germany

[2] Natl Acad Sci Ukraine, Inst Met Phys, UA-03142 Kiev, Ukraine

[3] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

[4] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[5] BESSY, Helmholtz Zentrum Berlin, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 13期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; TRANSITION-TEMPERATURE; SCENARIO;

D O I：

10.1103/PhysRevB.83.134513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By applying a state-of-the-art angle-resolved photoemission to LiFeAs, the only stoichiometric pnictide superconductor without magnetic ordering, we identify a clear fingerprint of the phonon spectrum in the fermionic self-energy and estimate the electron-phonon coupling strength, which appears to be sufficient to mediate the superconductivity. This result suggests that the superconductivity in pnictides could be based on the conventional phonon pairing enhanced by the van Hove singularity in the electronic density of states and by the strong electron-electron interaction.

引用

页数：6

共 40 条

[1] NEW THEORY OF STRONG-COUPLING SUPERCONDUCTORS AND HIGH-TEMPERATURE SUPERCONDUCTIVITY OF METALLIC OXIDES [J].

ALEXANDROV, AS .

PHYSICAL REVIEW B, 1988, 38 (01) :925-927

[2] TRANSITION-TEMPERATURE OF STRONG-COUPLED SUPERCONDUCTORS REANALYZED [J].

ALLEN, PB ;

DYNES, RC .

PHYSICAL REVIEW B, 1975, 12 (03) :905-922

[3] THEORY OF SUPERCONDUCTIVITY [J].

BARDEEN, J ;

COOPER, LN ;

SCHRIEFFER, JR .

PHYSICAL REVIEW, 1957, 108 (05) :1175-1204

[4] Is LaFeAsO1-xFx an electron-phonon superconductor? [J].

Boeri, L. ;

Dolgov, O. V. ;

Golubov, A. A. .

PHYSICAL REVIEW LETTERS, 2008, 101 (02)

[5] Superconductivity without Nesting in LiFeAs [J].

Borisenko, S. V. ;

Zabolotnyy, V. B. ;

Evtushinsky, D. V. ;

Kim, T. K. ;

Morozov, I. V. ;

Yaresko, A. N. ;

Kordyuk, A. A. ;

Behr, G. ;

Vasiliev, A. ;

Follath, R. ;

Buechner, B. .

PHYSICAL REVIEW LETTERS, 2010, 105 (06)

[6] Theory of magnetism and triplet superconductivity in LiFeAs [J].

Brydon, P. M. R. ;

Daghofer, Maria ;

Timm, Carsten ;

van den Brink, Jeroen .

PHYSICAL REVIEW B, 2011, 83 (06)

[7] Strength of the spin-fluctuation-mediated pairing interaction in a high-temperature superconductor [J].

Dahm, T. ;

Hinkov, V. ;

Borisenko, S. V. ;

Kordyuk, A. A. ;

Zabolotnyy, V. B. ;

Fink, J. ;

Buechner, B. ;

Scalapino, D. J. ;

Hanke, W. ;

Keimer, B. .

NATURE PHYSICS, 2009, 5 (03) :217-221

[8] Anisotropic electron-phonon interaction in the cuprates [J].

Devereaux, TP ;

Cuk, T ;

Shen, ZX ;

Nagaosa, N .

PHYSICAL REVIEW LETTERS, 2004, 93 (11) :117004-1

[9]

Ginzburg V.L., 1982, High-Temperature Superconductivity

[10]

GLADSTONE G, 1969, SUPERCONDUCTIVITY, V2, P665

← 1 2 3 4 →