Multiple Nodeless Superconducting Gaps in (Ba0:6K0:4)Fe2As2 Superconductor from Angle-Resolved Photoemission Spectroscopy

被引：1

作者：

Zhao Lin ^{[1
]}

Liu Hai-Yun ^{[1
]}

Zhang Wen-Tao ^{[1
]}

Meng Jian-Qiao ^{[1
]}

Jia Xiao-Wen ^{[1
]}

Liu Guo-Dong ^{[1
]}

Dong Xiao-Li ^{[1
]}

Chen Gen-Fu

Luo Jian-Lin

Wang Nan-Lin

Lu Wei ^{[1
]}

Wang Gui-Ling ^{[2
]}

Zhou Yong ^{[2
]}

Zhu Yong ^{[3
]}

Wang Xiao-Yang ^{[3
]}

Xu Zu-Yan ^{[2
]}

Chen Chuang-Tian ^{[3
]}

Zhou Xing-Jiang ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Key Lab Opt, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2008年 / 25卷 / 12期

关键词：

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High resolution angle-resolved photoemission measurements have been carried out to study the superconducting gap in the (Ba0:6K0:4)Fe2As2 superconductor with T-c=35K. Two hole-like Fermi surface sheets around the point exhibit different superconducting gaps. The inner Fermi surface sheet shows larger (10 similar to 12meV) and slightly momentum-dependent gap while the outer one has smaller (7 similar to 8 meV) and nearly isotropic gap. The lack of gap node in both Fermi surface sheets favours s-wave superconducting gap symmetry. Superconducting gap opening is also observed at the M (pi, pi) point. The two Fermi surface spots near the M point are gapped below T-c but the gap persists above T-c. The rich and detailed superconducting gap information will provide key insights and constraints in understanding pairing mechanism in the iron-based superconductors.

引用

页码：4402 / 4405

页数：4

共 46 条

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PHYSICAL REVIEW B, 2011, 83 (06):
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PHYSICAL REVIEW B, 2013, 87 (09)
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PHYSICAL REVIEW B, 2016, 93 (01)

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