Low-temperature dependence of the thermo-magnetic transport properties of the SrTiO3/LaAlO3 interface

TL;DR

This paper investigates the unusual magnetic and thermal transport behaviors at the SrTiO3/LaAlO3 interface at low temperatures, revealing complex phenomena that are partially explained by a two-band model.

Contribution

It provides the first comprehensive analysis of multiple transport properties at this interface, highlighting the need for advanced models at high magnetic fields.

Findings

Transport properties show anomalous field and temperature dependence.

A two-band model explains low-temperature and low-field behavior.

High magnetic field behavior requires more detailed modeling.

Abstract

We report transport measurements, including: Hall, Seebeck and Nernst Effect. All these transport properties exhibit anomalous field and temperature dependences, with a change of behavior observed at about H 1.5T and T 15K. We were able to reconcile the low-temperature-low-field behavior of all transport properties using a simple two band analysis. A more detailed model is required in order to explain the high magnetic field regime.