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Majorana fermion chain at the quantum spin Hall edge

Shivamoggi, V. and Refael, G. and Moore, J. E. (2010) Majorana fermion chain at the quantum spin Hall edge. Physical Review B, 82 (4). Art. No. 041405. ISSN 1098-0121. doi:10.1103/PhysRevB.82.041405.

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We study a realization of a 1D chain of Majorana bound states at the interfaces between alternating ferromagnetic and superconducting regions at a quantum spin Hall insulator edge. In the limit of well-separated Majoranas, the system can be mapped to the transverse field Ising model. The disordered critical point can be reached by tuning the relative magnitude or phases of the ferromagnetic and superconducting order parameters. We compute the voltage dependence of the tunneling current from a metallic tip into the Majorana chain as a direct probe of the random critical state.

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Additional Information: © 2010 The American Physical Society. Received 3 May 2010; revised manuscript received 27 June 2010; published 15 July 2010. The authors thank L. Fu, C. L. Kane, and L. Molenkamp for useful conversations and acknowledge support from NSF under Grant No. DMR-0804413 V.S. and J.E.M. and from the Packard Foundation, The Sloan Foundation, the Research Corporation, and DARPA G.R..
Funding AgencyGrant Number
Packard FoundationUNSPECIFIED
Sloan FoundationUNSPECIFIED
Research CorporationUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Issue or Number:4
Classification Code:PACS: 73.20.At,, 72.25.Mk, 73.43.-f
Record Number:CaltechAUTHORS:20100806-141508064
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Official Citation:Shivamoggi, V., G. Refael, et al. (2010). "Majorana fermion chain at the quantum spin Hall edge." Physical Review B 82(4): 041405.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19322
Deposited By: Tony Diaz
Deposited On:06 Aug 2010 22:37
Last Modified:08 Nov 2021 23:51

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