Publication Date:
2018-09-06
Description:
Author(s): Tomáš Rauch, Thomas Olsen, David Vanderbilt, and Ivo Souza A static electric field generates circulating currents at the surfaces of a magnetoelectric insulator. Remarkably, the anomalous Hall (transverse) part of the surface conductivity can change by multiples of e 2 / h depending on the insulating surface preparation, and a bulk calculation does not fix its quantized part. To resolve this ambiguity, the authors have developed a formalism for calculating the full surface anomalous Hall conductivity in a slab geometry. They identified a Berry-curvature term whose value can change by quantized amounts by adjusting the surface Hamiltonian, and a nongeometric term that does not depend on the surface preparation. [Phys. Rev. B 98, 115108] Published Wed Sep 05, 2018
Keywords:
Electronic structure and strongly correlated systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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