Anomalous thermoelectric properties of a Floquet topological insulator with spin momentum non-orthogonality

Madhumita Saha, Debashree Chowdhury

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The spin momentum non-orthogonality in 3D topological insulators leads to modification of the spin texture and brings in an out-of-plane spin polarization component. Apart from the spin texture, the anomalous thermoelectric properties of these materials are worth studying. In this paper, we have pointed out that the off resonant light used to irradiate the surface states, induces a gap, which becomes momentum dependent due to the presence of non-orthogonal terms in the Hamiltonian. Importantly, to maintain the off resonant condition of light, the momentum value should satisfy a bound. Furthermore, the momentum dependent gap causes a topological transition at a higher value of momentum, which is important to analyse the unusual double peak structure of the Nernst and electrical conductivities.

Original languageEnglish
Article number174301
JournalJournal of Applied Physics
Volume122
Issue number17
DOIs
StatePublished - 7 Nov 2017

ASJC Scopus subject areas

  • General Physics and Astronomy

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