TY - EJOUR
AU - Varshney, Dinesh
AU - Singh, Namita
PY - 2023
DA - November
TI - Thermoelectric power of metallic Rb3C60: phonon-drag and carrier diffusion contributions
T2 - Journal of Theoretical and Applied Physics
VL - 6
L1 - https://oiccpress.com/journal-of-theoretical-and-applied-physics/article/thermoelectric-power-of-metallic-rb3c60-phonon-drag-and-carrier-diffusion-contributions/
DO - 10.1186/2251-7235-6-37
N2 - AbstractThermoelectric power (S) of Rb3C60 fullerides in the metallic phase is theoretically estimated. We first develop a Hamiltonian model that incorporates the scattering rates within the relaxation time approximation to estimate the phonon-drag thermoelectric power (Sphdrag) incorporating the scattering of phonons with defects, electrons as carriers, grain boundaries, and phonon-phonon interactions. As a next step, Mott expression within parabolic band approximation is used to analyze the electron diffusive thermoelectric power (Scdiff) using Fermi energy as electron parameter, and Scdiff shows a linear temperature dependence. The Sphdrag is nonzero in both normal and superconducting states. Its behavior is determined by competition among the several operating scattering rates for heat carriers and a balance between diffusive carrier and phonon-drag contributions. Acoustic phonons are effectively scattered by various scatterers for the thermoelectric power. S infers a change in slope above transition temperature and becomes almost linear above 70 K.
IS - 1
PB - OICC Press
KW - Carrier diffusion, Intermolecular phonon, Phonon drag, RbC, Thermoelectric power 
EN -