Observation of ordered vortices with Andreev bound states in Ba0.6K0.4Fe2As2

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	Observation of ordered vortices with Andreev bound states in Ba0.6K0.4Fe2As2
	Shan, L ; Wang, YL ; Shen, B ; Zeng, B ; Huang, Y ; Li, A ; Wang, D ; Yang, HA ; Ren, C ; Wang, QH ; Pan, SHH ; Wen, HH
刊名	NATURE PHYSICS
	2011
卷号	7 期号:4 页码:325
关键词	SCANNING TUNNELING SPECTROSCOPY VORTEX-CORE ELECTRONIC-STRUCTURE II SUPERCONDUCTOR BI2SR2CACU2O8+DELTA DENSITY MICROSCOPE LATTICE
ISSN号	1745-2473
通讯作者	Shan, L (reprint author), Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China.
中文摘要	For a type-II superconductor in an applied magnetic field greater than the lower critical field H-c1, the magnetic flux will penetrate into the superconductor and form quantized vortices with Andreev bound states in the vortex cores. The characteristics of the bound states are related to the pairing symmetry and band structure of the superconductor. Recently, a new family of high temperature (high-T-c) superconductors, the iron pnictides, has been discovered. Surprisingly, in electron-doped Ba(Fe1-xCox)(2)As-2, no bound state was found in the vortices. Here, we use a low-temperature scanning tunnelling microscope to study the electronic structure of hole-doped Ba0.6K0.4Fe2As2. Two superconducting gaps (with gap values 2 Delta/k(B) T-c approximate to 2.2 and 5.1, where k(B) is Boltzmann's constant) were observed in the superconducting state. By applying magnetic fields, we observed ordered vortices with Andreev bound states in the vortex cores. The bound states and their spatial evolution can be qualitatively explained by our numerical calculations for multiband s-wave superconductivity.
收录类别	SCI
资助信息	Natural Science Foundation of China [10774170, 10974086, 10734120]; Ministry of Science and Technology of China [2011CBA00100, 2011CB922101, 2010CB923002]; Chinese Academy of Sciences
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/50164]
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	Shan, L,Wang, YL,Shen, B,et al. Observation of ordered vortices with Andreev bound states in Ba0.6K0.4Fe2As2[J]. NATURE PHYSICS,2011,7(4):325.
APA	Shan, L.,Wang, YL.,Shen, B.,Zeng, B.,Huang, Y.,...&Wen, HH.(2011).Observation of ordered vortices with Andreev bound states in Ba0.6K0.4Fe2As2.NATURE PHYSICS,7(4),325.
MLA	Shan, L,et al."Observation of ordered vortices with Andreev bound states in Ba0.6K0.4Fe2As2".NATURE PHYSICS 7.4(2011):325.