Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO                         3                          Interfaces

Hongrui Zhang; Yang Ma; Hui Zhang; Xiaobing Chen; Shuanhu Wang; Gang Li; Yu Yun; Xi Yan; Yuansha Chen; Fengxia Hu; Jianwang Cai; Baogen Shen; Wei Han; Jirong Sun

doi:10.1021/acs.nanolett.8b04509

Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO ₃ Interfaces

Hongrui Zhang, Yang Ma, Hui Zhang, Xiaobing Chen, Shuanhu Wang, Gang Li, Yu Yun, Xi Yan, Yuansha Chen, Fengxia Hu, Jianwang Cai, Baogen Shen, Wei Han, Jirong Sun

School of Physical Science and Technology

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

36 Scopus citations

Abstract

With the help of the two-dimensional electron gas (2DEG) at the LaAlO ₃ -SrTiO ₃ interface, spin and charge currents can be interconverted. However, the conversion efficiency has been strongly depressed by LaAlO ₃ , which blocks spin transmission. It is therefore highly desired to explore 2DEGs sandwiched between ferromagnetic insulators that are transparent for magnons. By constructing epitaxial heterostructure with ferromagnetic EuO, which is conducting for spin current but insulating for electric current, and KTaO ₃ , we successfully obtained the 2DEGs, which can receive thermally injected spin current directly from EuO and convert the spin current to charge current via inverse Edelstein effect of the interface. Strong dependence of the spin Seebeck coefficient on the layer thickness of EuO is further observed and the propagation length for non-equilibrium magnons in EuO has been determined. The present work demonstrates the great potential of the 2DEGs formed by ferromagnetic oxides for spin caloritronics.

Original language	English
Pages (from-to)	1605-1612
Number of pages	8
Journal	Nano Letters
Volume	19
Issue number	3
DOIs	https://doi.org/10.1021/acs.nanolett.8b04509
State	Published - 13 Mar 2019

Keywords

2DEG
inverse Edelstein effect
Rashba spin splitting
spin-charge conversion
thermal spin injection

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10.1021/acs.nanolett.8b04509

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Zhang, H., Ma, Y., Zhang, H., Chen, X., Wang, S., Li, G., Yun, Y., Yan, X., Chen, Y., Hu, F., Cai, J., Shen, B., Han, W., & Sun, J. (2019). Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO ₃ Interfaces Nano Letters, 19(3), 1605-1612. https://doi.org/10.1021/acs.nanolett.8b04509

@article{9b19ea2c81d04368a7dd2ed876357666,

title = " Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO 3 Interfaces ",

abstract = " With the help of the two-dimensional electron gas (2DEG) at the LaAlO 3 -SrTiO 3 interface, spin and charge currents can be interconverted. However, the conversion efficiency has been strongly depressed by LaAlO 3 , which blocks spin transmission. It is therefore highly desired to explore 2DEGs sandwiched between ferromagnetic insulators that are transparent for magnons. By constructing epitaxial heterostructure with ferromagnetic EuO, which is conducting for spin current but insulating for electric current, and KTaO 3 , we successfully obtained the 2DEGs, which can receive thermally injected spin current directly from EuO and convert the spin current to charge current via inverse Edelstein effect of the interface. Strong dependence of the spin Seebeck coefficient on the layer thickness of EuO is further observed and the propagation length for non-equilibrium magnons in EuO has been determined. The present work demonstrates the great potential of the 2DEGs formed by ferromagnetic oxides for spin caloritronics.",

keywords = "2DEG, inverse Edelstein effect, Rashba spin splitting, spin-charge conversion, thermal spin injection",

author = "Hongrui Zhang and Yang Ma and Hui Zhang and Xiaobing Chen and Shuanhu Wang and Gang Li and Yu Yun and Xi Yan and Yuansha Chen and Fengxia Hu and Jianwang Cai and Baogen Shen and Wei Han and Jirong Sun",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = mar,

day = "13",

doi = "10.1021/acs.nanolett.8b04509",

language = "英语",

volume = "19",

pages = "1605--1612",

journal = "Nano Letters",

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publisher = "American Chemical Society",

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Zhang, H, Ma, Y, Zhang, H, Chen, X, Wang, S, Li, G, Yun, Y, Yan, X, Chen, Y, Hu, F, Cai, J, Shen, B, Han, W & Sun, J 2019, ' Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO ₃ Interfaces ', Nano Letters, vol. 19, no. 3, pp. 1605-1612. https://doi.org/10.1021/acs.nanolett.8b04509

Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO ₃ Interfaces . / Zhang, Hongrui; Ma, Yang; Zhang, Hui et al.
In: Nano Letters, Vol. 19, No. 3, 13.03.2019, p. 1605-1612.

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

TY - JOUR

T1 - Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO 3 Interfaces

AU - Zhang, Hongrui

AU - Ma, Yang

AU - Zhang, Hui

AU - Chen, Xiaobing

AU - Wang, Shuanhu

AU - Li, Gang

AU - Yun, Yu

AU - Yan, Xi

AU - Chen, Yuansha

AU - Hu, Fengxia

AU - Cai, Jianwang

AU - Shen, Baogen

AU - Han, Wei

AU - Sun, Jirong

PY - 2019/3/13

Y1 - 2019/3/13

N2 - With the help of the two-dimensional electron gas (2DEG) at the LaAlO 3 -SrTiO 3 interface, spin and charge currents can be interconverted. However, the conversion efficiency has been strongly depressed by LaAlO 3 , which blocks spin transmission. It is therefore highly desired to explore 2DEGs sandwiched between ferromagnetic insulators that are transparent for magnons. By constructing epitaxial heterostructure with ferromagnetic EuO, which is conducting for spin current but insulating for electric current, and KTaO 3 , we successfully obtained the 2DEGs, which can receive thermally injected spin current directly from EuO and convert the spin current to charge current via inverse Edelstein effect of the interface. Strong dependence of the spin Seebeck coefficient on the layer thickness of EuO is further observed and the propagation length for non-equilibrium magnons in EuO has been determined. The present work demonstrates the great potential of the 2DEGs formed by ferromagnetic oxides for spin caloritronics.

AB - With the help of the two-dimensional electron gas (2DEG) at the LaAlO 3 -SrTiO 3 interface, spin and charge currents can be interconverted. However, the conversion efficiency has been strongly depressed by LaAlO 3 , which blocks spin transmission. It is therefore highly desired to explore 2DEGs sandwiched between ferromagnetic insulators that are transparent for magnons. By constructing epitaxial heterostructure with ferromagnetic EuO, which is conducting for spin current but insulating for electric current, and KTaO 3 , we successfully obtained the 2DEGs, which can receive thermally injected spin current directly from EuO and convert the spin current to charge current via inverse Edelstein effect of the interface. Strong dependence of the spin Seebeck coefficient on the layer thickness of EuO is further observed and the propagation length for non-equilibrium magnons in EuO has been determined. The present work demonstrates the great potential of the 2DEGs formed by ferromagnetic oxides for spin caloritronics.

KW - 2DEG

KW - inverse Edelstein effect

KW - Rashba spin splitting

KW - spin-charge conversion

KW - thermal spin injection

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DO - 10.1021/acs.nanolett.8b04509

M3 - 文章

C2 - 30715894

AN - SCOPUS:85061978691

SN - 1530-6984

VL - 19

SP - 1605

EP - 1612

JO - Nano Letters

JF - Nano Letters

IS - 3

ER -

Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO ₃ Interfaces

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