Effect of incommensurate potential on the resonant tunneling through Majorana bound states on the topological superconductor chains

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	Effect of incommensurate potential on the resonant tunneling through Majorana bound states on the topological superconductor chains
	Pei, W ; Shu, C ; Gao, XL
刊名	EUROPEAN PHYSICAL JOURNAL B
	2014
卷号	87 期号:7
ISSN号	1434-6028
通讯作者	Pei, W (reprint author), Zhejiang Univ Technol, Inst Appl Phys, Hangzhou 310058, Zhejiang, Peoples R China.
中文摘要	We study the transport through the Kitaev chain with incommensurate potentials coupled to two normal leads by the numerical operator method. We find a quantized linear conductance of e(2)/h, which is independent to the disorder strength and the gate voltage in a wide range, signaling the Majorana bound states. While the incommensurate potential suppresses the current at finite voltage bias, and then narrows the linear response regime of the I-V curve which exhibits two plateaus corresponding to the superconducting gap and the band edge, respectively. The linear conductance abruptly drops to zero as the disorder strength reaches the critical value 2g(s) + 2 Delta with Delta the p-wave pairing amplitude and g(s) the hopping between neighbor sites, corresponding to the transition from the topological superconducting phase to the Anderson localized phase. Changing the gate voltage also causes an abrupt drop of the linear conductance by driving the chain into the topologically trivial superconducting phase, whose I-V curve exhibits an exponential shape.
资助信息	NSF of China [11304280, 11174360, 11121063, 11374266, 11174253]; Zhejiang Provincial Natural Science Foundation [R6110175]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59075]
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	Pei, W,Shu, C,Gao, XL. Effect of incommensurate potential on the resonant tunneling through Majorana bound states on the topological superconductor chains[J]. EUROPEAN PHYSICAL JOURNAL B,2014,87(7).
APA	Pei, W,Shu, C,&Gao, XL.(2014).Effect of incommensurate potential on the resonant tunneling through Majorana bound states on the topological superconductor chains.EUROPEAN PHYSICAL JOURNAL B,87(7).
MLA	Pei, W,et al."Effect of incommensurate potential on the resonant tunneling through Majorana bound states on the topological superconductor chains".EUROPEAN PHYSICAL JOURNAL B 87.7(2014).