Anisotropic Magneto-conductance of InAs Nanowire: Angle Dependent Suppression of 1D Weak Localization

TL;DR

This paper investigates how the orientation of magnetic fields affects the magneto-conductance in InAs nanowires, revealing anisotropic suppression of 1D weak localization depending on field direction and strength.

Contribution

It provides a detailed experimental analysis of angle-dependent magneto-conductance and confirms the suppression of 1D weak localization as the underlying mechanism.

Findings

Both perpendicular and parallel magnetic fields increase conductance.

Parallel magnetic fields induce a smaller magneto-conductance effect.

The observed anisotropic behavior aligns with theoretical predictions of weak localization suppression.

Abstract

The magneto-conductance of an InAs nanowire is investigated with respect to the relative orientation between external magnetic field and the nanowire axis. It is found that both the perpendicular and the parallel magnetic fields induce a positive magneto-conductance. Yet the parallel magnetic field induced longitudinal magneto-conductance has a smaller magnitude. This anisotropic magneto-transport phenomenon is studied as a function of temperature, magnetic field strength and at an arbitrary angle between the magnetic field and the nanowire. We show that the observed effect is in quantitative agreement with the suppression of one-dimensional (1D) weak localization.