Common Fermi-surface topology and nodeless superconducting gap of K0.68Fe1.79Se2 and (Tl0.45K0.34)Fe1.84Se2 superconductors revealed via angle-resolved photoemission

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	Common Fermi-surface topology and nodeless superconducting gap of K0.68Fe1.79Se2 and (Tl0.45K0.34)Fe1.84Se2 superconductors revealed via angle-resolved photoemission
	Zhao, L ; Mou, DX ; Liu, SY ; Jia, XW ; He, JF ; Peng, YY ; Yu, L ; Liu, X ; Liu, GD ; He, SL ; Dong, XL ; Zhang, J ; He, JB ; Wang, DM ; Chen, GF ; Guo, JG ; Chen, XL ; Wang, XY ; Peng, QJ ; Wang, ZM ; Zhang, SJ ; Yang, F ; Xu, ZY ; Chen, CT ; Zhou, XJ
刊名	PHYSICAL REVIEW B
	2011
卷号	83 期号:14
ISSN号	1098-0121
通讯作者	Zhao, L: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	We carried out high-resolution angle-resolved photoemission measurements on the electronic structure and superconducting gap of K0.68Fe1.79Se2 (T-c = 32 K) and (Tl0.45K0.34)Fe1.84Se2 (T-c = 28 K) superconductors. In addition to the electron-like Fermi surface near M(pi, pi), two electron-like Fermi pockets are revealed around the zone center Gamma (0,0) in K0.68Fe1.79Se2. This observation makes the Fermi surface topology of K0.68Fe1.79Se2 consistent with that of (Tl, Rb)(x)Fe2-ySe2 and (Tl, K)(x)Fe2-ySe2 compounds. A nearly isotropic superconducting gap Delta is observed along the electron-like Fermi pocket near the M point in K0.68Fe1.79Se2 (Delta similar to 9 meV) and (Tl0.45K0.34)Fe1.84Se2 (Delta similar to 8 meV). The establishment of a universal picture on the Fermi surface topology and superconducting gap in the A(x)Fe(2-y)Se(2) (A = K, Tl, Cs, Rb, etc.) superconductors will provide important information for understanding the superconductivity mechanism of iron-based superconductors.
收录类别	SCI
资助信息	NSFC [10734120]; MOST of China [2011CB921703]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/34920]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhao, L,Mou, DX,Liu, SY,et al. Common Fermi-surface topology and nodeless superconducting gap of K0.68Fe1.79Se2 and (Tl0.45K0.34)Fe1.84Se2 superconductors revealed via angle-resolved photoemission[J]. PHYSICAL REVIEW B,2011,83(14).
APA	Zhao, L.,Mou, DX.,Liu, SY.,Jia, XW.,He, JF.,...&Zhou, XJ.(2011).Common Fermi-surface topology and nodeless superconducting gap of K0.68Fe1.79Se2 and (Tl0.45K0.34)Fe1.84Se2 superconductors revealed via angle-resolved photoemission.PHYSICAL REVIEW B,83(14).
MLA	Zhao, L,et al."Common Fermi-surface topology and nodeless superconducting gap of K0.68Fe1.79Se2 and (Tl0.45K0.34)Fe1.84Se2 superconductors revealed via angle-resolved photoemission".PHYSICAL REVIEW B 83.14(2011).