A Green's function approach to the Casimir effect on topological insulators with planar symmetry

A. Martín-Ruiz, M. Cambiaso, L. F. Urrutia

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22 Citations (Scopus)

Abstract

We investigate the Casimir stress on a topological insulator (TI) between two metallic plates. The TI is assumed to be joined to one of the plates and its surface in front of the other is covered by a thin magnetic layer, which turns the TI into a full insulator. We also analyze the limit where one of the plates is sent to infinity yielding the Casimir stress between a conducting plate and a TI. To this end we employ a local approach in terms of the stress-energy tensor of the system, its vacuum expectation value being subsequently evaluated in terms of the appropriate Green's function. Finally, the construction of the renormalised vacuum stress-energy tensor in the region between the plates yields the Casimir stress. Numerical results are also presented.

Original languageEnglish
Article number60005
JournalEPL
Volume113
Issue number6
DOIs
Publication statusPublished - Mar 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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