Nonlocal spin diffusion driven by giant spin hall effect at oxide heterointerfaces

Mi Jin Jin; Seon Young Moon; Jungmin Park; Vijayakumar Modepalli; Junhyeon Jo; Shin Ik Kim; Hyun Cheol Koo; Byoung Chul Min; Hyun Woo Lee; Seung Hyub Baek; Jung Woo Yoo

doi:10.1021/acs.nanolett.6b03050

Nonlocal spin diffusion driven by giant spin hall effect at oxide heterointerfaces

Mi Jin Jin, Seon Young Moon, Jungmin Park, Vijayakumar Modepalli, Junhyeon Jo, Shin Ik Kim, Hyun Cheol Koo, Byoung Chul Min, Hyun Woo Lee, Seung Hyub Baek, Jung Woo Yoo

KU-KIST Graduate School of Converging Science and Technology

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

38 Citations (Scopus)

Abstract

A two-dimensional electron gas emerged at a LaAlO₃/SrTiO₃ interface is an ideal system for "spin-orbitronics" as the structure itself strongly couple the spin and orbital degree of freedom through the Rashba spin-orbit interaction. One of core experiments toward this direction is the nonlocal spin transport measurement, which has remained elusive due to the low spin injection efficiency to this system. Here we bypass the problem by generating a spin current not through the spin injection from outside but instead through the inherent spin Hall effect and demonstrate the nonlocal spin transport. The analysis on the nonlocal spin voltage, confirmed by the signature of a Larmor spin precession and its length dependence, displays that both D'yakonov-Perel' and Elliott-Yafet mechanisms involve in the spin relaxation at low temperature. Our results show that the oxide heterointerface is highly efficient in spin-charge conversion with exceptionally strong spin Hall coefficient λ ∼ 0.15 ± 0.05 and could be an outstanding platform for the study of coupled charge and spin transport phenomena and their electronic applications.

Original language	English
Pages (from-to)	36-43
Number of pages	8
Journal	Nano Letters
Volume	17
Issue number	1
DOIs	https://doi.org/10.1021/acs.nanolett.6b03050
Publication status	Published - 2017 Jan 11

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation (NRF) of Korea (Nos. 2014R1A1A2055685 and 2016R1D1A1B03935019) funded by the Ministry of Education, Science, and Technology and Future Challenge Project or Creativity and Innovation Project (No. 1.140092.01) funded by the Ulsan National Institute of Science and Technology. This research was also supported by the Korea Institute of Science and Technology (Nos. 2E26370 and 2E26380). H.-W. L. was supported by the NRF of Korea (No. 2011-0030046).

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

Nonlocal spin diffusion
Oxide heterointerface
Rashba spin-orbit interaction
Spin Hall effect
Spin-orbitronics

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.6b03050

Cite this

@article{4a92e8cb4b5b414da37941208fa10d30,

title = "Nonlocal spin diffusion driven by giant spin hall effect at oxide heterointerfaces",

abstract = "A two-dimensional electron gas emerged at a LaAlO3/SrTiO3 interface is an ideal system for {"}spin-orbitronics{"} as the structure itself strongly couple the spin and orbital degree of freedom through the Rashba spin-orbit interaction. One of core experiments toward this direction is the nonlocal spin transport measurement, which has remained elusive due to the low spin injection efficiency to this system. Here we bypass the problem by generating a spin current not through the spin injection from outside but instead through the inherent spin Hall effect and demonstrate the nonlocal spin transport. The analysis on the nonlocal spin voltage, confirmed by the signature of a Larmor spin precession and its length dependence, displays that both D'yakonov-Perel' and Elliott-Yafet mechanisms involve in the spin relaxation at low temperature. Our results show that the oxide heterointerface is highly efficient in spin-charge conversion with exceptionally strong spin Hall coefficient λ ∼ 0.15 ± 0.05 and could be an outstanding platform for the study of coupled charge and spin transport phenomena and their electronic applications.",

keywords = "Nonlocal spin diffusion, Oxide heterointerface, Rashba spin-orbit interaction, Spin Hall effect, Spin-orbitronics",

author = "Jin, {Mi Jin} and Moon, {Seon Young} and Jungmin Park and Vijayakumar Modepalli and Junhyeon Jo and Kim, {Shin Ik} and Koo, {Hyun Cheol} and Min, {Byoung Chul} and Lee, {Hyun Woo} and Baek, {Seung Hyub} and Yoo, {Jung Woo}",

note = "Funding Information: This work was supported by the National Research Foundation (NRF) of Korea (Nos. 2014R1A1A2055685 and 2016R1D1A1B03935019) funded by the Ministry of Education, Science, and Technology and Future Challenge Project or Creativity and Innovation Project (No. 1.140092.01) funded by the Ulsan National Institute of Science and Technology. This research was also supported by the Korea Institute of Science and Technology (Nos. 2E26370 and 2E26380). H.-W. L. was supported by the NRF of Korea (No. 2011-0030046). Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

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doi = "10.1021/acs.nanolett.6b03050",

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T1 - Nonlocal spin diffusion driven by giant spin hall effect at oxide heterointerfaces

AU - Jin, Mi Jin

AU - Moon, Seon Young

AU - Park, Jungmin

AU - Modepalli, Vijayakumar

AU - Jo, Junhyeon

AU - Kim, Shin Ik

AU - Koo, Hyun Cheol

AU - Min, Byoung Chul

AU - Lee, Hyun Woo

AU - Baek, Seung Hyub

AU - Yoo, Jung Woo

N1 - Funding Information: This work was supported by the National Research Foundation (NRF) of Korea (Nos. 2014R1A1A2055685 and 2016R1D1A1B03935019) funded by the Ministry of Education, Science, and Technology and Future Challenge Project or Creativity and Innovation Project (No. 1.140092.01) funded by the Ulsan National Institute of Science and Technology. This research was also supported by the Korea Institute of Science and Technology (Nos. 2E26370 and 2E26380). H.-W. L. was supported by the NRF of Korea (No. 2011-0030046). Publisher Copyright: © 2016 American Chemical Society.

PY - 2017/1/11

Y1 - 2017/1/11

N2 - A two-dimensional electron gas emerged at a LaAlO3/SrTiO3 interface is an ideal system for "spin-orbitronics" as the structure itself strongly couple the spin and orbital degree of freedom through the Rashba spin-orbit interaction. One of core experiments toward this direction is the nonlocal spin transport measurement, which has remained elusive due to the low spin injection efficiency to this system. Here we bypass the problem by generating a spin current not through the spin injection from outside but instead through the inherent spin Hall effect and demonstrate the nonlocal spin transport. The analysis on the nonlocal spin voltage, confirmed by the signature of a Larmor spin precession and its length dependence, displays that both D'yakonov-Perel' and Elliott-Yafet mechanisms involve in the spin relaxation at low temperature. Our results show that the oxide heterointerface is highly efficient in spin-charge conversion with exceptionally strong spin Hall coefficient λ ∼ 0.15 ± 0.05 and could be an outstanding platform for the study of coupled charge and spin transport phenomena and their electronic applications.

AB - A two-dimensional electron gas emerged at a LaAlO3/SrTiO3 interface is an ideal system for "spin-orbitronics" as the structure itself strongly couple the spin and orbital degree of freedom through the Rashba spin-orbit interaction. One of core experiments toward this direction is the nonlocal spin transport measurement, which has remained elusive due to the low spin injection efficiency to this system. Here we bypass the problem by generating a spin current not through the spin injection from outside but instead through the inherent spin Hall effect and demonstrate the nonlocal spin transport. The analysis on the nonlocal spin voltage, confirmed by the signature of a Larmor spin precession and its length dependence, displays that both D'yakonov-Perel' and Elliott-Yafet mechanisms involve in the spin relaxation at low temperature. Our results show that the oxide heterointerface is highly efficient in spin-charge conversion with exceptionally strong spin Hall coefficient λ ∼ 0.15 ± 0.05 and could be an outstanding platform for the study of coupled charge and spin transport phenomena and their electronic applications.

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Nonlocal spin diffusion driven by giant spin hall effect at oxide heterointerfaces

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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