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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effective model for Majorana modes in graphene

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Author(s):
Manesco, A. L. R. [1] ; Weber, G. [1] ; Rodrigues Jr, D.
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Lorena Engn Sch, BR-12602810 Lorena, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Physical Review B; v. 100, n. 12 SEP 9 2019.
Web of Science Citations: 0
Abstract

It was recently proposed that the interface between a graphene nanoribbon in the canted antiferromagnetic quantum Hall state and a s-wave superconductor may present topological superconductivity, resulting in the appearance of Majorana zero modes {[}San-Jose et al., Phys. Rev. X 5, 041042 (2015)]. However, a description of the low-energy physics in terms of experimentally controllable parameters was still missing. Starting from a mean-field continuum model for graphene in proximity to a superconductor, we derive the low-energy effective Hamiltonian describing the interface of this heterojunction from first principles. A comparison between tight-binding simulations and analytical calculations with effective masses suggests that normal reflections at the interface must be considered in order to fully describe the low-energy physics. (AU)

FAPESP's process: 16/10167-8 - Investigation of electronic and topological properties of superconductor-graphene heterojunctions for applications in quantum computation devices
Grantee:Antonio Lucas Rigotti Manesco
Support type: Scholarships in Brazil - Doctorate (Direct)