# 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/en/paper/0912.3731v1/

## Key points

- The LaAlO3/SrTiO3 interface is a quasi-two-dimensional electron gas with exciting new functionalities
- The interface has been proposed as a promising nanoelectronics fabrication platform
- A large Rashba spin-orbit interaction arises from the interfacial breaking of inversion symmetry
- This interaction can be modulated by an external electric field, offering potential for novel spintronic applications
- Magnetotransport experiments were conducted to explore the evolution of the spin-orbit coupling across the phase diagram of the system
- A steep rise in Rashba interaction occurs around the doping level where a quantum critical point separates insulating and superconducting ground states
- Tuning this Rashba interaction could be used to control and manipulate electronic properties in this system
- Oxide interfaces offer rich opportunities for exploring novel electronic properties and developing new technologies based on their unique characteristics.

## Summary

The LaAlO3/SrTiO3 interface is a quasi-two-dimensional electron gas that has been found to offer exciting new functionalities, including tunable superconductivity, and has been proposed as a promising nanoelectronics fabrication platform. In this study, the authors present a new example of an electronic property arising from the interfacial breaking of inversion symmetry: a large Rashba spin-orbit interaction. This interaction can be modulated by the application of an external electric field, offering potential for novel spintronic applications. To explore the evolution of the spin-orbit coupling across the phase diagram of the system, magnetotransport experiments were conducted. The researchers uncovered 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. This finding suggests that tuning this Rashba interaction could be used to control and manipulate electronic properties in this system. These results demonstrate that oxide interfaces offer rich opportunities for exploring novel electronic properties and developing new technologies based on their unique characteristics. Furthermore, this discovery provides evidence that tuning this Rashba spin-orbit interaction could be used to control and manipulate electronic properties in these systems. Overall, these findings add to our understanding of oxide interfaces and open up exciting possibilities for future research in this area.