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题名: Probing zero modes of a defect in a Kitaev quantum wire
作者: Li, SW;  Li, ZZ;  Cai, CY;  Sun, CP
刊名: PHYSICAL REVIEW B
出版日期: 2014
卷号: 89, 期号:13, 页码:134505
关键词: MAJORANA FERMIONS ;  ANYONS ;  SUPERCONDUCTOR ;  COMPUTATION
学科分类: Physics
DOI: 10.1103/PhysRevB.89.134505
通讯作者: Li, SW (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
部门归属: [Li, Sheng-Wen
英文摘要: The Kitaev quantum wire (KQW) model with open boundary possesses two Majorana edge modes. When the local chemical potential on a defect site is much higher than that on other sites and than the hopping energy, the electron hopping is blocked at this site. We show that the existence of such a defect on a closed KQW also gives rise to two low-energy modes, which can simulate the edge modes. The energies of the defect modes vanish to zero as the local chemical potential of the defect increase to infinity. We develop a quantum Langevin equation to study the transport of KQW for both open and closed cases. We find that when the lead is contacted with the site beside the defect, we can observe two splitted peaks around the zero-bias voltage in the differential conductance spectrum, whereas if the lead is contacted with the bulk of the quantum wire far from the the defect or the open edges, we cannot observe any zero-bias peak.
资助者: National Natural Science Foundation of China [11121403, 10935010, 11074261]; National 973-program [2012CB922104]; Postdoctoral Science Foundation of China [2013M530516]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000334119300003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15788
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Li, SW,Li, ZZ,Cai, CY,et al. Probing zero modes of a defect in a Kitaev quantum wire[J]. PHYSICAL REVIEW B,2014,89(13):134505.
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