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

doi:10.1166/jnn.2015.11497

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

KU-KIST Graduate School of Converging Science and Technology

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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 language	English
Pages (from-to)	8632-8636
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	15
Issue number	11
DOIs	https://doi.org/10.1166/jnn.2015.11497
Publication status	Published - 2015 Nov 1

Bibliographical note

Publisher Copyright:
Copyright © 2015 American Scientific Publishers.

Keywords

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

ASJC Scopus subject areas

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

Access to Document

10.1166/jnn.2015.11497

Cite this

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title = "Conductance change induced by the Rashba effect in the LaAlO3/SrTiO3 interface",

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.",

keywords = "2DEG, Lao/STO, Magnetoconductance, Rashba effect, Spin-orbit interaction",

author = "Taeyueb Kim and Kim, {Shin Ik} and Baek, {Seung Hyub} and Jinki Hong and Koo, {Hyun Cheol}",

note = "Publisher Copyright: Copyright {\textcopyright} 2015 American Scientific Publishers.",

year = "2015",

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doi = "10.1166/jnn.2015.11497",

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TY - JOUR

T1 - Conductance change induced by the Rashba effect in the LaAlO3/SrTiO3 interface

AU - Kim, Taeyueb

AU - Kim, Shin Ik

AU - Baek, Seung Hyub

AU - Hong, Jinki

AU - Koo, Hyun Cheol

PY - 2015/11/1

Y1 - 2015/11/1

N2 - 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.

AB - 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.

KW - 2DEG

KW - Lao/STO

KW - Magnetoconductance

KW - Rashba effect

KW - Spin-orbit interaction

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