Boson-assisted tunneling in layered metals

TL;DR

This paper develops a theory for boson-assisted tunneling in layered metals, explaining the temperature-dependent out-plane resistivity in quasi-two-dimensional metals through electron-boson interactions.

Contribution

It introduces a new theoretical framework for boson-assisted tunneling considering electron-phonon and electron-electron interactions in layered metals.

Findings

Explains non-monotonic out-plane resistivity variation with temperature.

Provides a unified theory for different boson interactions in layered structures.

Aligns theoretical predictions with experimental observations.

Abstract

A theory for boson-assisted tunneling via randomly distributed resonant states in a layered metals is developed. As particular examples, we consider the electron-phonon interaction and the interaction between localized and conduction electrons. The theory is applied to explain a non-monotonic variation of the out-plane resistivity with temperature observed in quasi-two-dimensional metals.