# False spin zeros in the angular dependence of magnetic quantum oscillation in quasi-two-dimensional metals

## TL;DR

This paper investigates how angular and quantum magnetoresistance oscillations interact in quasi-two-dimensional metals, revealing false spin zero effects caused by angular beats that can be distinguished from true spin zeros.

## Contribution

It identifies and explains the false spin zero phenomenon arising from angular oscillations of quantum oscillation amplitudes in high magnetic fields.

## Key findings

- Angular oscillations can mimic spin zeros, leading to potential misinterpretation.
- False spin zeros are enhanced by incoherent interlayer transport channels.
- The effect helps distinguish different contributions to the Dingle temperature.

## Abstract

The interplay between angular and quantum magnetoresistance oscillations in quasi-two-dimensional metals leads to the angular oscillations of the amplitude of quantum oscillations. This effect becomes pronounced in high magnetic field, when the simple factorization of the angular and quantum oscillations is not valid. The amplitude of quantum magnetoresistance oscillations is reduced at the Yamaji angles, i.e. at the maxima of the angular magnetoresistance oscillations. These angular beats of the amplitude of quantum oscillations resemble and may be confused with the spin-zero effect, coming from the Zeeman splitting. The proposed effect of "false spin zeros" becomes stronger in the presence of incoherent channels of interlayer electron transport and can be used to separate the different contributions to the Dingle temperature and to check for violations from the standard factorization of angular and quantum magnetoresistance oscillations.