Spin-polarized two-dimensional electron gas in undoped Mg xZn 1-xO/ZnO heterostructures

K. Han; N. Tang; J. D. Ye; J. X. Duan; Y. C. Liu; K. L. Teo; B. Shen

doi:10.1063/1.4711775

Spin-polarized two-dimensional electron gas in undoped Mg _xZn _1-xO/ZnO heterostructures

K. Han^*, N. Tang, J. D. Ye, J. X. Duan, Y. C. Liu, K. L. Teo, B. Shen

^*此作品的通讯作者

科研成果: 期刊稿件 › 文章 › 同行评审

18 引用（Scopus）

摘要

Quantum transport properties of two-dimensional electron gas (2DEG) in undoped Mg _xZn _1-xO/ZnO heterostructures grown by metal organic vapor phase epitaxy have been investigated. A large zero-field spin-splitting energy more than 15 meV in the 2DEG is determined at 1.6 K. Meanwhile, ferromagnetism is observed in the heterostructures. The findings reveal that the 2DEG is spin polarized at zero magnetic fields. It is believed that the exchange interaction between the itinerant electrons in the two-dimensional channel and the magnetic polarons in the Mg _xZn _1-xO barrier around the interface results in the spin polarization of the 2DEG.

源语言	英语
文章编号	192105
期刊	Applied Physics Letters
卷	100
期	19
DOI	https://doi.org/10.1063/1.4711775
出版状态	已出版 - 7 5月 2012
已对外发布	是

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title = "Spin-polarized two-dimensional electron gas in undoped Mg xZn 1-xO/ZnO heterostructures",

abstract = "Quantum transport properties of two-dimensional electron gas (2DEG) in undoped Mg xZn 1-xO/ZnO heterostructures grown by metal organic vapor phase epitaxy have been investigated. A large zero-field spin-splitting energy more than 15 meV in the 2DEG is determined at 1.6 K. Meanwhile, ferromagnetism is observed in the heterostructures. The findings reveal that the 2DEG is spin polarized at zero magnetic fields. It is believed that the exchange interaction between the itinerant electrons in the two-dimensional channel and the magnetic polarons in the Mg xZn 1-xO barrier around the interface results in the spin polarization of the 2DEG.",

author = "K. Han and N. Tang and Ye, {J. D.} and Duan, {J. X.} and Liu, {Y. C.} and Teo, {K. L.} and B. Shen",

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T1 - Spin-polarized two-dimensional electron gas in undoped Mg xZn 1-xO/ZnO heterostructures

AU - Han, K.

AU - Tang, N.

AU - Ye, J. D.

AU - Duan, J. X.

AU - Liu, Y. C.

AU - Teo, K. L.

AU - Shen, B.

PY - 2012/5/7

Y1 - 2012/5/7

N2 - Quantum transport properties of two-dimensional electron gas (2DEG) in undoped Mg xZn 1-xO/ZnO heterostructures grown by metal organic vapor phase epitaxy have been investigated. A large zero-field spin-splitting energy more than 15 meV in the 2DEG is determined at 1.6 K. Meanwhile, ferromagnetism is observed in the heterostructures. The findings reveal that the 2DEG is spin polarized at zero magnetic fields. It is believed that the exchange interaction between the itinerant electrons in the two-dimensional channel and the magnetic polarons in the Mg xZn 1-xO barrier around the interface results in the spin polarization of the 2DEG.

AB - Quantum transport properties of two-dimensional electron gas (2DEG) in undoped Mg xZn 1-xO/ZnO heterostructures grown by metal organic vapor phase epitaxy have been investigated. A large zero-field spin-splitting energy more than 15 meV in the 2DEG is determined at 1.6 K. Meanwhile, ferromagnetism is observed in the heterostructures. The findings reveal that the 2DEG is spin polarized at zero magnetic fields. It is believed that the exchange interaction between the itinerant electrons in the two-dimensional channel and the magnetic polarons in the Mg xZn 1-xO barrier around the interface results in the spin polarization of the 2DEG.

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DO - 10.1063/1.4711775

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Spin-polarized two-dimensional electron gas in undoped Mg xZn 1-xO/ZnO heterostructures

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Spin-polarized two-dimensional electron gas in undoped Mg _xZn _1-xO/ZnO heterostructures