Angular Magnetoresistance Oscillations in Organic Conductors

TL;DR

This paper explains how magnetic field orientation causes electron wave functions in quasi-one-dimensional conductors to change dimensionality, leading to observable oscillations in magnetoresistance, supported by experimental data.

Contribution

It introduces a theory describing 1D to 2D wave function crossovers causing angular magnetoresistance oscillations in Q1D conductors.

Findings

Theoretical predictions match experimental data on (TMTSF)2ClO4.

Dimensional crossovers lead to wave function delocalization.

Angular magnetoresistance oscillations are explained by wave function changes.

Abstract

We demonstrate that electron wave functions change their dimensionality at some commensurate directions of a magnetic field in conductors with open [quasi-one-dimensional (Q1D)] sheets of Fermi surface. These 1D -> 2D dimensional crossovers lead to delocalization of wave functions and are responsible for angular magnetoresistance oscillations. As an example, we show that suggested theory is in qualitative and quantitative agreements with the recent experimental data obtained on (TMTSF)2ClO4 conductor.