title: Phonon-drag magnetothermopower in Rashba spin-split two-dimensional electron systems.
abstract: We study the phonon-drag contribution to the thermoelectric power in a quasi-two-dimensional electron system confined in GaAs/AlGaAs heterostructure in the presence of both Rashba spin-orbit interaction and perpendicular magnetic field at very low temperature. It is observed that the peaks in the phonon-drag thermopower split into two when the Rashba spin-orbit coupling constant is strong. This splitting is a direct consequence of the Rashba spin-orbit interaction. We show the dependence of phonon-drag thermopower on both magnetic field and temperature numerically. A power-law dependence of phonon-drag magnetothermopower on the temperature in the Bloch-Gruneisen regime is found. We also extract the exponent of the temperature dependence of phonon-drag thermopower for different parameters like electron density, magnetic field, and the spin-orbit coupling constant.
authors.affiliation: Department of Physics, Indian Institute of Technology-Kanpur, Kanpur-208 016, India.
authors.forename: Tutul
authors.initials: T
authors.lastname: Biswas
authors.forename: Tarun Kanti
authors.initials: TK
authors.lastname: Ghosh
mesh_terms: D001152:Arsenicals / Q000737:chemistry* / Q000528:radiation effects; D003198:Computer Simulation; D004583:Electrons; D004735:Energy Transfer / Q000528:radiation effects; D005708:Gallium / Q000737:chemistry* / Q000528:radiation effects; D006358:Hot Temperature; D060526:Magnetic Fields; D008956:Models, Chemical; D013113:Spin Labels; D013816:Thermodynamics; D014783:Viscosity / Q000528:radiation effects
chemical_list: D001152:Arsenicals; D013113:Spin Labels; C043055:gallium arsenide; D005708:Gallium