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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/14154

Title: Repulsive casimir effect with chern insulators
Authors: Rodriguez-Lopez, Pablo
Grushin, Adolfo G.
Issue Date: 2014
Publisher: © American Physical Society
Citation: RODRIGUEZ-LOPEZ, P. and GRUSHIN, A.G., 2014. Repulsive casimir effect with chern insulators. Physical Review Letters, 112 (056804), 5pp.
Abstract: We theoretically predict that the Casimir force in vacuum between two Chern insulator plates can be repulsive (attractive) at long distances whenever the sign of the Chern numbers characterizing the two plates are opposite (equal). A unique feature of this system is that the sign of the force can be tuned simply by turning over one of the plates or alternatively by electrostatic doping.We calculate and take into account the full optical response of the plates and argue that such repulsion is a general phenomena for these systems as it relies on the quantized zero frequency Hall conductivity. We show that achieving repulsion is possible with thin films of Cr-doped ðBi; SbÞ2Te3, that were recently discovered to be Chern insulators with quantized Hall conductivity.
Description: This article was published in the journal, Physical Review Letters [© American Physical Society] and the definitive version is also available at: http://dx.doi.org/10.1103/PhysRevLett.112.056804.
Sponsor: Support from FIS2011-23713, PIB2010BZ-00512 (A. G. G.) and EPSRC [grant number: EP/H049797/1] and MOSAICO (P. R.-L.) is acknowledged.
Version: Published
DOI: 10.1103/PhysRevLett.112.056804
URI: https://dspace.lboro.ac.uk/2134/14154
Publisher Link: http://dx.doi.org/10.1103/PhysRevLett.112.056804
ISSN: 0031-9007
Appears in Collections:Published Articles (Physics)

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