Magneto-resistance up to 60 Tesla in Topological Insulator Bi2Te3 Thin Films

TL;DR

This study investigates the magneto-transport properties of Bi2Te3 thin films under high magnetic fields up to 60 Tesla, revealing non-saturating linear magneto-resistance explained by weak antilocalization and Dirac fermion physics.

Contribution

First demonstration of high-field magneto-resistance in Bi2Te3 thin films, linking linear MR to weak antilocalization and topological insulator properties.

Findings

Linear magneto-resistance persists up to 60 Tesla.

Weak antilocalization explains the high-field MR behavior.

Elastic scattering time exceeds spin-orbit scattering time.

Abstract

We report magneto-transport studies of topological insulator Bi_{2}Te_{3} thin films grown by pulsed laser deposition. A non-saturating linear-like magneto-resistance (MR) is observed at low temperatures in the magnetic field range from a few Tesla up to 60 Tesla. We demonstrate that the strong linear-like MR at high field can be well understood as the weak antilocalization phenomena described by Hikami-Larkin-Nagaoka theory. Our analysis suggests that in our system, a topological insulator, the elastic scattering time can be longer than the spin-orbit scattering time. We briefly discuss our results in the context of Dirac Fermion physics and 'quantum linear magnetoresistance'.