Magnetic quantum oscillations in doped antiferromagnetic insulators

TL;DR

This paper investigates how magnetic quantum oscillations in doped antiferromagnetic insulators depend on magnetic field orientation, providing a potential method to probe antiferromagnetic order in various insulating materials.

Contribution

It introduces a novel analysis of the angular dependence of quantum oscillations in doped antiferromagnetic insulators, revealing a sensitive probe of magnetic order.

Findings

Oscillation amplitudes depend on azimuthal and polar angles.

Dependence can distinguish different types of insulating states.

Provides a new experimental approach to study magnetic order.

Abstract

Energy spectrum of electrons (holes) doped into a two-dimensional antiferromagnetic insulator is quantized in an external magnetic field of arbitrary direction. A peculiar dependence of de Haas-van Alphen (dHvA) or Shubnikov-de Haas (SdH) magneto-oscillation amplitudes on the azimuthal in-plane angle from the magnetization direction and on the polar angle from the out-of-plane direction is found, which can be used as a sensitive probe of the antiferromagnetic order in doped Mott-Hubbard, spin-density wave (SDW), and conventional band-structure insulators.