Conductance change induced by the Rashba effect in the LaAlO3/SrTiO3 interface

Taeyueb Kim, Shin Ik Kim, Seung Hyub Baek, Jinki Hong, Hyun Cheol Koo

Research output: Contribution to journalArticle

Abstract

The LaAlO3/SrTiO3 (LAO/STO) heterostructure has an inherent space inversion asymmetry causing an internal electric field near the interface. The Rashba spin-orbit coupling arising from this structural characteristic has a considerable influence on spin transport. With application of an external magnetic field, we observed conductance change in the LAO/STO interface which depends on the sign and magnitude of the field. Our systematic study revealed that these results come from spin dependent transport, by which we obtained quantitative strength of the Rashba effect. The Rashba strength in this system depends on the temperature: it varies from 2.6×10-12 eVm to negligible value in the temperature range of 1.8 K∼12 K. This method for detecting Rashba effect covers a wider temperature range in comparison with those obtained from Shubnikov-de Haas oscillation or weak antilocalization measurements.

Original languageEnglish
Pages (from-to)8632-8636
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume15
Issue number11
DOIs
Publication statusPublished - 2015 Nov 1

Keywords

  • 2DEG
  • Lao/STO
  • Magnetoconductance
  • Rashba effect
  • Spin-orbit interaction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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