title: Phonon-drag thermopower and hot-electron energy-loss rate in a Rashba spin-orbit coupled two-dimensional electron system.
abstract: We theoretically study the phonon-drag contribution to the thermoelectric power and the hot-electron energy-loss rate in a Rashba spin-orbit coupled two-dimensional electron system in the Bloch-Gruneisen (BG) regime. We assume that electrons interact with longitudinal acoustic phonons through a deformation potential and with both longitudinal and transverse acoustic phonons through a piezoelectric potential. The effect of the Rashba spin-orbit interaction on the magnitude and temperature dependence of the phonon-drag thermoelectric power and hot-electron energy-loss rate is discussed. We numerically extract the exponent of temperature dependence of the phonon-drag thermopower and the energy-loss rate. We find that the exponents are suppressed due to the presence of the Rashba spin-orbit coupling.
authors.affiliation: Department of Physics, Indian Institute of Technology-Kanpur, Kanpur-208 016, India. tutulb@iitk.ac.in
authors.forename: Tutul
authors.initials: T
authors.lastname: Biswas
authors.forename: Tarun Kanti
authors.initials: TK
authors.lastname: Ghosh
mesh_terms: D004583:Electrons; D006358:Hot Temperature; D008962:Models, Theoretical; D060739:Phonons