Thermoelectric Transport through SU N Kondo Impurity

by Mikhail Kiselev

at Condensed Matter Seminar

Mon, 24 Apr 2017, 11:30
Physics building (#54) room 207

Abstract

We investigate thermoelectric transport through a SU N quantum impurity in the Kondo regime The strong coupling fixed point theory is described by the local Fermi liquid paradigm Using Keldysh technique we analyze the electric current through the quantum impurity at both finite bias voltage and finite temperature drop across it The theory of a steady state at zero current provides a complete description of the Seebeck effect We find pronounced non linear effects in temperature drop at low temperatures We illustrate the significance of the non linearities for enhancement of thermopower by two examples of SU 4 symmetric regimes characterized by a filling factor m: i particle hole symmetric at m 2 and ii particle hole non symmetric at m 1 We analyze the effects of potential scattering and coupling asymmetry on the transport coefficients We discuss connections between the theory and transport experiments with coupled quantum dots and carbon nanotubes

Created on 15-04-2017 by Bar Lev, Yevgeny (ybarlev)
Updaded on 15-04-2017 by Bar Lev, Yevgeny (ybarlev)