Out-of-Plane Momentum and Symmetry-Dependent Energy Gap of the Pnictide Ba0.6K0.4Fe2As2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy

被引：77

作者：

Zhang, Y. ^{[1
,2
]}

Yang, L. X. ^{[1
,2
]}

Chen, F. ^{[1
,2
]}

Zhou, B. ^{[1
,2
]}

Wang, X. F. ^{[3
]}

Chen, X. H. ^{[3
]}

Arita, M. ^{[4
,5
]}

Shimada, K. ^{[4
,5
]}

Namatame, H. ^{[4
,5
]}

Taniguchi, M. ^{[4
,5
]}

Hu, J. P. ^{[6
]}

Xie, B. P. ^{[1
,2
]}

Feng, D. L. ^{[1
,2
]}

机构：

[1] Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

[2] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China

[3] Univ Sci & Technol China, Dept Phys, Hefei 230027, Anhui, Peoples R China

[4] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Hiroshima 7398526, Japan

[5] Hiroshima Univ, Grad Sch Sci, Hiroshima 7398526, Japan

[6] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.105.117003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The three-dimensional band structure and superconducting gap of Ba0.6K0.4Fe2As2 are studied with angle-resolved photoemission spectroscopy. In contrast with previous results, we have identified three holelike Fermi surface sheets near the zone center with sizable out-of-plane or k(z) dispersion. The superconducting gap on certain Fermi surface sheets shows significant k(z) dependence. Moreover, the superconducting gap sizes are different at the same Fermi momentum for two bands with different spatial symmetries (one odd, one even). Our results further reveal the three-dimensional and orbital-dependent structure of the superconducting gap in iron pnictides, which facilitates the understanding of momentum-integrated measurements and provides a distinct test for theories.

引用

页数：4

共 29 条

[1] Superconducting gap symmetry of Ba0.6K0.4Fe2As2 studied by angle-resolved photoemission spectroscopy
Nakayama, K.
Sato, T.
Richard, P.
Xu, Y. -M.
Sekiba, Y.
Souma, S.
Chen, G. F.
Luo, J. L.
Wang, N. L.
Ding, H.
Takahashi, T.
[J]. EPL, 2009, 85 (06)
[2] Electronic structure of optimally doped pnictide Ba0.6K0.4Fe2As2: a comprehensive angle-resolved photoemission spectroscopy investigation
Ding, H.
Nakayama, K.
Richard, P.
Souma, S.
Sato, T.
Takahashi, T.
Neupane, M.
Xu, Y-M
Pan, Z-H
Fedorov, A. V.
Wang, Z.
Dai, X.
Fang, Z.
Chen, G. F.
Luo, J. L.
Wang, N. L.
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2011, 23 (13)
[3] Optical conductivity of Ba0.6K0.4Fe2As2: The effect of in-plane and out-of-plane doping in the superconducting gap
Dai, Y. M.
Xu, B.
Shen, B.
Wen, H. H.
Qiu, X. G.
Lobo, R. P. S. M.
[J]. EPL, 2013, 104 (04)
[4] Angle-Resolved Photoemission Spectroscopy of the Fe-Based Ba0.6K0.4Fe2As2 High Temperature Superconductor: Evidence for an Orbital Selective Electron-Mode Coupling
Richard, P.
Sato, T.
Nakayama, K.
Souma, S.
Takahashi, T.
Xu, Y. -M.
Chen, G. F.
Luo, J. L.
Wang, N. L.
Ding, H.
[J]. PHYSICAL REVIEW LETTERS, 2009, 102 (04)
[5] Band-dependent Quasiparticle Dynamics in Single Crystals of the Ba0.6K0.4Fe2As2 Superconductor Revealed by Pump-Probe Spectroscopy
Torchinsky, Darius H.
Chen, G. F.
Luo, J. L.
Wang, N. L.
Gedik, Nuh
[J]. PHYSICAL REVIEW LETTERS, 2010, 105 (02)
[6] In-plane optical spectral weight redistribution in the optimally doped Ba0.6K0.4Fe2As2 superconductor
许兵
戴耀民
肖宏
R. P. S. M. Lobo
邱祥冈
[J]. Chinese Physics B, 2014, (08) : 520 - 524
[7] In-plane optical spectral weight redistribution in the optimally doped Ba0.6K0.4Fe2As2 superconductor
Xu Bing
Dai Yao-Min
Xiao Hong
Lobo, R. P. S. M.
Qiu Xiang-Gang
[J]. CHINESE PHYSICS B, 2014, 23 (08)
[8] Orbital-dependent modulation of the superconducting gap in uniaxially strained Ba0.6K0.4Fe2As2
Chen, L.
Han, T. T.
Cai, C.
Wang, Z. G.
Wang, Y. D.
Xin, Z. M.
Zhang, Y.
[J]. PHYSICAL REVIEW B, 2021, 104 (06)
[9] Probing the superconducting energy gap from infrared spectroscopy on a Ba0.6K0.4Fe2As2 single crystal with Tc=37 K
Li, G.
Hu, W. Z.
Dong, J.
Li, Z.
Zheng, P.
Chen, G. F.
Luo, J. L.
Wang, N. L.
[J]. PHYSICAL REVIEW LETTERS, 2008, 101 (10)
[10] Orbital selectivity of layer-resolved tunneling in the iron-based superconductor Ba0.6K0.4Fe2As2
Yin, J-X
Wu, X-X
Li, Jian
Wu, Zheng
Wang, J-H
Ting, C-S
Hor, P-H
Liang, X. J.
Zhang, C. L.
Dai, P. C.
Wang, X. C.
Jin, C. Q.
Chen, G. F.
Hu, J. P.
Wang, Z-Q
Li, Ang
Ding, H.
Pan, S. H.
[J]. PHYSICAL REVIEW B, 2020, 102 (05)

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