Dissymmetrical tunnelling in heavy fermion metals

TL;DR

This paper predicts that tunnelling conductivity between heavy fermion metals and simple metals can be asymmetric at low temperatures due to fermion condensation quantum phase transition effects.

Contribution

It introduces the concept of dissymmetrical tunnelling in heavy fermion metals caused by fermion condensation quantum phase transition.

Findings

Tunnelling conductivity can be noticeably dissymmetrical at low temperatures.

Dissymmetry is linked to the fermion condensation quantum phase transition.

Experimental observation of this effect is possible in heavy fermion metals.

Abstract

A tunnelling conductivity between a heavy fermion metal and a simple metallic point is considered. We show that at low temperatures this conductivity can be noticeably dissymmetrical with respect to the change of voltage bias. The dissymmetry can be observed in experiments on the heavy fermion metals whose electronic system has undergone the fermion condensation quantum phase transition.