# Influence of nonequilibrium phonons on the amplitude of magnetoquantum oscillations in the point-contact resistance

## TL;DR

This study investigates how nonequilibrium phonons affect the amplitude of magnetoquantum oscillations in metallic point contacts of Be and Al, revealing nonmonotonous and decreasing behaviors linked to electron-phonon interactions.

## Contribution

It provides new insights into the influence of nonequilibrium phonons on quantum oscillations in point contacts, highlighting different voltage-dependent behaviors.

## Key findings

- Oscillation amplitude varies nonmonotonously with voltage in some contacts.
- In other contacts, the amplitude decreases as voltage increases.
- The behavior is related to electron-phonon interactions and phonon generation.

## Abstract

For metallic point contacts with Be and Al the magnetoquantum oscillations in the contact resistance have been investigated as a function of the applied voltage over the contact. For one set of point contacts the oscillation amplitude is found to vary nonmonotonously with the applied voltage with similarities to the point-contact spectrum of the electron-phonon interaction. The other part of the investigated point contacts shows a decrease of the oscillation amplitude with increasing bias voltage. For the understanding of the voltage dependence of the amplitude of the point-contact magnetoresistance oscillations the influence of nonequilibrium phonons generated by the ballistically injected electrons will be discussed.