Thermoelectric transport in the topological phase due to the coexistence of superconductivity and spin-density-wave
Department of Physics, Banaras Hindu
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Received in final form: 4 November 2015
Published online: 11 January 2016
We study the thermoelectric transport in two dimensional topological system which has coexistence of superconductivity (SC) and spin-density wave (SDW). The SC is presumed to be of dx2 − y2 + (px + ipy) type whereas the SDW order parameter is of BCS symmetry. The Hamiltonian describing such a coexistence phase is shown to have topological phase in addition to the conventional one. The transport properties in such topological system have two distinct contributions: (i) the surface/edge and (ii) the bulk. The competition between the surface/edge versus the bulk transport is analyzed in different parameter regimes and the possibility of enhancing the figure of merit is discussed.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2016