TY - JOUR
T1 - Anomalous thermoelectric properties of a Floquet topological insulator with spin momentum non-orthogonality
AU - Saha, Madhumita
AU - Chowdhury, Debashree
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/11/7
Y1 - 2017/11/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85032907264&partnerID=8YFLogxK
U2 - 10.1063/1.4990969
DO - 10.1063/1.4990969
M3 - Article
AN - SCOPUS:85032907264
SN - 0021-8979
VL - 122
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 17
M1 - 174301
ER -