Parity Effect in the Resonant Tunneling

TL;DR

This paper proposes a mechanism explaining the parity effect in thermally assisted resonant tunneling, highlighting how quantum relaxation in uniaxial magnets varies with temperature and field sweeping rate.

Contribution

It introduces a novel explanation for the parity effect based on nonadiabatic transitions and quantum relaxation in uniaxial magnets at finite temperatures.

Findings

Alternating enhancement of relaxation explained as a quantum relaxation property.

The sequence of enhancement depends on the field sweeping rate.

Mechanism links parity effect to nonadiabatic transitions in thermally excited states.

Abstract

A mechanism of the parity effect in the thermally assisted resonant tunneling is proposed in the view point of nonadiabatic transitions of thermally excited states. In this mechanism, alternating enhancement of the relaxation is naturally understood as a general property of quantum relaxation of uniaxial magnets at finite temperatures where appreciable populations are pumped up to excited states. It is also found that the enhanced sequence depends on the sweeping rate of the field.