Thermoelectric properties of an ultra-thin topological insulator

Abstract

Thermoelectric coefficients of an ultra-thin topological insulator are presented here. The hybridization between top and bottom surface states of a topological insulator plays a significant role. In absence of magnetic field, thermopower increases and thermal conductivity decreases with increase of the hybridization energy. In presence of magnetic field perpendicular to the ultra-thin topological insulator, thermoelectric coefficients exhibit quantum oscillations with inverse magnetic field, whose frequency is strongly modified by the Zeeman energy and phase factor is governed by the product of the Lande g-factor and the hybridization energy. In addition to the numerical results, the low-temperature approximate analytical results of the thermoelectric coefficients are also provided. It is also observed that for a given magnetic field these transport coefficients oscillate with hybridization energy, whose frequency depends on the Lande g-factor.

5 figures and 7 pages. arXiv admin note: text overlap with arXiv:1204.5634

References in corpus (13)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
• Topological Surface States Protected From Backscattering by Chiral Spin Texture
• Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene
• Exciton condensation and charge fractionalization in a topological insulator film
• Landau quantization and the thickness limit of topological insulator thin films of Sb2Te3
• Holey topological thermoelectrics
• Quantum capacitance of an ultrathin topological insulator film in a magnetic field
• Thermoelectric efficiency of topological insulators in a magnetic field

Cited by in corpus (2)

• Valley-polarized magnetoconductivity and particle-hole symmetry breaking in a periodically modulated $\alpha$-${\mathcal{T}}_3$ lattice
• Anomalous Nernst effect on a magnetically-doped topological insulator surface: A Green's function approach