# Tunable Rashba spin-orbit interaction at oxide interfaces

**Authors:** A. D. Caviglia, M. Gabay, S. Gariglio, N. Reyren, C. Cancellieri, J. -M. Triscone  
**arXiv:** [0912.3731](https://arxiv.org/abs/0912.3731)  
**Date:** 2009-12-18  
**Summary page:** https://www.summarizepaper.com/fr/paper/0912.3731v1/

## Abstract

The quasi-two-dimensional electron gas found at the LaAlO3/SrTiO3 interface offers exciting new functionalities, such as tunable superconductivity, and has been proposed as a new nanoelectronics fabrication platform. Here we lay out a new example of an electronic property arising from the interfacial breaking of inversion symmetry, namely a large Rashba spin-orbit interaction, whose magnitude can be modulated by the application of an external electric field. By means of magnetotransport experiments we explore the evolution of the spin-orbit coupling across the phase diagram of the system. We uncover a steep rise in Rashba interaction occurring around the doping level where a quantum critical point separates the insulating and superconducting ground states of the system.