Temperature and Doping-Dependent Renormalization Effects of the Low Energy Electronic Structure of Ba1-xKxFe2As2 Single Crystals

被引：21

作者：

Koitzsch, A. ^{[1
]}

Inosov, D. S. ^{[1
,2
]}

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

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

Kordyuk, A. A. ^{[1
,3
]}

Kondrat, A. ^{[1
]}

Hess, C. ^{[1
]}

Knupfer, M. ^{[1
]}

Buechner, B. ^{[1
]}

Sun, G. L. ^{[2
]}

Hinkov, V. ^{[2
]}

Lin, C. T. ^{[2
]}

Varykhalov, A. ^{[4
]}

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

机构：

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

[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

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

[4] BESSY, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 16期

关键词：

NODELESS SUPERCONDUCTING GAPS; BA0.6K0.4FE2AS2; ORDER;

D O I：

10.1103/PhysRevLett.102.167001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the low energy electronic structure of Ba1-xKxFe2As2 (x=0; 0.3, T-c=32 K) single crystals by angle-resolved photoemission spectroscopy with a focus on the renormalization of the dispersion. A kink feature is detected at E approximate to 25 meV for the doped compound which vanishes at T=200 K but stays virtually constant when T-c is crossed. Our experimental findings rule out the magnetic resonance mode as the origin of the kink and render conventional electron-phonon coupling unlikely. They put stringent restrictions on the dominant source of the electronic interaction channel.

引用

页数：4

共 30 条

[1]

[Anonymous], ARXIV08062147

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

Boeri, L. ;

Dolgov, O. V. ;

Golubov, A. A. .

PHYSICAL REVIEW LETTERS, 2008, 101 (02)

[3] Lattice and electronic anomalies of CaFe2As2 studied by Raman spectroscopy [J].

Choi, K. -Y. ;

Wulferding, D. ;

Lemmens, P. ;

Ni, N. ;

Bud'ko, S. L. ;

Canfield, P. C. .

PHYSICAL REVIEW B, 2008, 78 (21)

[4] Phonon Density of States of LaFeAsO1-xFx [J].

Christianson, A. D. ;

Lumsden, M. D. ;

Delaire, O. ;

Stone, M. B. ;

Abernathy, D. L. ;

McGuire, M. A. ;

Sefat, A. S. ;

Jin, R. ;

Sales, B. C. ;

Mandrus, D. ;

Mun, E. D. ;

Canfield, P. C. ;

Lin, J. Y. Y. ;

Lucas, M. ;

Kresch, M. ;

Keith, J. B. ;

Fultz, B. ;

Goremychkin, E. A. ;

McQueeney, R. J. .

PHYSICAL REVIEW LETTERS, 2008, 101 (15)

[5] Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering [J].

Christianson, A. D. ;

Goremychkin, E. A. ;

Osborn, R. ;

Rosenkranz, S. ;

Lumsden, M. D. ;

Malliakas, C. D. ;

Todorov, I. S. ;

Claus, H. ;

Chung, D. Y. ;

Kanatzidis, M. G. ;

Bewley, R. I. ;

Guidi, T. .

NATURE, 2008, 456 (7224) :930-932

[6] Angle-resolved photoemission studies of the cuprate superconductors [J].

Damascelli, A ;

Hussain, Z ;

Shen, ZX .

REVIEWS OF MODERN PHYSICS, 2003, 75 (02) :473-541

[7] Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems [J].

de la Cruz, Clarina ;

Huang, Q. ;

Lynn, J. W. ;

Li, Jiying ;

Ratcliff, W., II ;

Zarestky, J. L. ;

Mook, H. A. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. ;

Dai, Pengcheng .

NATURE, 2008, 453 (7197) :899-902

[8] Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2 [J].

Ding, H. ;

Richard, P. ;

Nakayama, K. ;

Sugawara, K. ;

Arakane, T. ;

Sekiba, Y. ;

Takayama, A. ;

Souma, S. ;

Sato, T. ;

Takahashi, T. ;

Wang, Z. ;

Dai, X. ;

Fang, Z. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. .

EPL, 2008, 83 (04)

[9]

ESCHRIG H, ARXIV08040186

[10] Momentum dependence of the superconducting gap in Ba1-xKxFe2As2 [J].

Evtushinsky, D. V. ;

Inosov, D. S. ;

Zabolotnyy, V. B. ;

Koitzsch, A. ;

Knupfer, M. ;

Buechner, B. ;

Viazovska, M. S. ;

Sun, G. L. ;

Hinkov, V. ;

Boris, A. V. ;

Lin, C. T. ;

Keimer, B. ;

Varykhalov, A. ;

Kordyuk, A. A. ;

Borisenko, S. V. .

PHYSICAL REVIEW B, 2009, 79 (05)

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