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Li, SW; Li, ZZ; Cai, CY; Sun, CP; Li, SW (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
Probing zero modes of a defect in a Kitaev quantum wire
Source PublicationPHYSICAL REVIEW B
Language英语
KeywordMajorana Fermions Anyons Superconductor Computation
AbstractThe 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.
2014
ISSN1098-0121
Volume89Issue:13Pages:134505
Subject AreaPhysics
DOI10.1103/PhysRevB.89.134505
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [11121403, 10935010, 11074261]; National 973-program [2012CB922104]; Postdoctoral Science Foundation of China [2013M530516] ; National Natural Science Foundation of China [11121403, 10935010, 11074261]; National 973-program [2012CB922104]; Postdoctoral Science Foundation of China [2013M530516] ; National Natural Science Foundation of China [11121403, 10935010, 11074261]; National 973-program [2012CB922104]; Postdoctoral Science Foundation of China [2013M530516] ; National Natural Science Foundation of China [11121403, 10935010, 11074261]; National 973-program [2012CB922104]; Postdoctoral Science Foundation of China [2013M530516]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15788
CollectionSCI期刊论文
Corresponding AuthorLi, SW (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
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.
APA Li, SW,Li, ZZ,Cai, CY,Sun, CP,&Li, SW .(2014).Probing zero modes of a defect in a Kitaev quantum wire.PHYSICAL REVIEW B,89(13),134505.
MLA Li, SW,et al."Probing zero modes of a defect in a Kitaev quantum wire".PHYSICAL REVIEW B 89.13(2014):134505.
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