Fizika Nizkikh Temperatur: Volume 45, Number 2 (February 2019), p. 192-203    ( to contents , go back )

Renormalization of triplet populations of spin dimer in zero magnetic field with quantum transport

V.V. Val’kov and S.V. Aksenov

L.V. Kirenskiy Institute of Physics, Siberian Branch of the Russian Academy of Sciences Krasnoyarsk 660036, Russia
E-mail: vvv@iph.krasn.ru,
asv86@iph.krasn.ru

Received October 12, 2018, published online December 20, 2018

Abstract

Based on the non-equilibrium Keldysh technique in the atomic representation, the effect of different population of magnetic states of a spin dimer interacting with electrons transported through such a device in zero magnetic field has been studied. To find the filling numbers of the quantum states of the device under strong non-equilibrium conditions, a system of kinetic equations has been obtained and solved using the nonequilibrium diagram technique for the Hubbard operators. Numerical analysis of these equations revealed non-equilibrium renormalizations due to strong spin-fermion correlations.

Key words: nonequilibrium quantum transport, spin dimer, kinetic equation, atomic representation, inelastic scattering.

Download 433773 byte View Contents