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

^*Corresponding author for this work

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

18 Citations (Scopus)

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.

Original language	English
Article number	192105
Journal	Applied Physics Letters
Volume	100
Issue number	19
DOIs	https://doi.org/10.1063/1.4711775
Publication status	Published - 7 May 2012
Externally published	Yes

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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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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

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

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