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Type: Artigo de periódico
Title: Effective Response Theory For Zero-energy Majorana Bound States In Three Spatial Dimensions
Author: Lopes
Pedro L. e S.; Teo
Jeffrey C. Y.; Ryu
Abstract: We propose a gravitational response theory for point defects (hedgehogs) binding Majorana zero modes in (3 + 1)-dimensional superconductors. Starting in 4 + 1 dimensions, where the point defect is extended into a line, a coupling of the bulk defect texture with the gravitational field is introduced. Diffeomorphism invariance then leads to an SU(2)(2) Kac-Moody current running along the defect line. The SU(2)(2) Kac-Moody algebra accounts for the non-Abelian nature of the zero modes in 3 + 1 dimensions. It is then shown to also encode the angular momentum density which permeates throughout the bulk between hedgehog-antihedgehog pairs.
Subject: Quantum Hall States
Topological Insulators
Thermal Transport
Citation: Effective Response Theory For Zero-energy Majorana Bound States In Three Spatial Dimensions. Amer Physical Soc, v. 91, p. MAY-2015.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.91.184111
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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