Origin and transport properties of two-dimensional electron gas at ZnMgO/ZnO interface grown by MOVPE

Jiandong Ye; Sze Ter Lim; Shulin Gu; H. Hoe Tan; Chennupati Jagadish; Kie Leong Teo

doi:10.1002/pssc.201200927

Origin and transport properties of two-dimensional electron gas at ZnMgO/ZnO interface grown by MOVPE

Jiandong Ye^*, Sze Ter Lim, Shulin Gu, H. Hoe Tan, Chennupati Jagadish, Kie Leong Teo

^*Corresponding author for this work

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

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Abstract

In this study, the origin and transport properties of high mobility carriers of two-dimensional electron gas (2DEG) at ZnMgO/ZnO interface have been investigated. It is found that the observed experimental dependence of carrier sheet density of 2DEG on ZnMgO thickness and Mg composition exhibits an excellent agreement with the theoretical calculations based on the surface charge model. It indicates that the mobile electrons in 2DEG are originated from the donor-like surface states. Moreover, the anomalous periodicity of Shubnikov-de Haas oscillations has been observed and the partial spin polarization feature of 2DEG has also been demonstrated, which exhibits the promising development in oxide spintronics applications.

Original language	English
Pages (from-to)	1268-1271
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	10
Issue number	10
DOIs	https://doi.org/10.1002/pssc.201200927
Publication status	Published - Oct 2013

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abstract = "In this study, the origin and transport properties of high mobility carriers of two-dimensional electron gas (2DEG) at ZnMgO/ZnO interface have been investigated. It is found that the observed experimental dependence of carrier sheet density of 2DEG on ZnMgO thickness and Mg composition exhibits an excellent agreement with the theoretical calculations based on the surface charge model. It indicates that the mobile electrons in 2DEG are originated from the donor-like surface states. Moreover, the anomalous periodicity of Shubnikov-de Haas oscillations has been observed and the partial spin polarization feature of 2DEG has also been demonstrated, which exhibits the promising development in oxide spintronics applications.",

keywords = "Metal-organic vapor phase epitaxy, Polar oxides, Two-dimensional electron gas",

author = "Jiandong Ye and Lim, {Sze Ter} and Shulin Gu and Tan, {H. Hoe} and Chennupati Jagadish and Teo, {Kie Leong}",

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T1 - Origin and transport properties of two-dimensional electron gas at ZnMgO/ZnO interface grown by MOVPE

AU - Ye, Jiandong

AU - Lim, Sze Ter

AU - Gu, Shulin

AU - Tan, H. Hoe

AU - Jagadish, Chennupati

AU - Teo, Kie Leong

PY - 2013/10

Y1 - 2013/10

N2 - In this study, the origin and transport properties of high mobility carriers of two-dimensional electron gas (2DEG) at ZnMgO/ZnO interface have been investigated. It is found that the observed experimental dependence of carrier sheet density of 2DEG on ZnMgO thickness and Mg composition exhibits an excellent agreement with the theoretical calculations based on the surface charge model. It indicates that the mobile electrons in 2DEG are originated from the donor-like surface states. Moreover, the anomalous periodicity of Shubnikov-de Haas oscillations has been observed and the partial spin polarization feature of 2DEG has also been demonstrated, which exhibits the promising development in oxide spintronics applications.

AB - In this study, the origin and transport properties of high mobility carriers of two-dimensional electron gas (2DEG) at ZnMgO/ZnO interface have been investigated. It is found that the observed experimental dependence of carrier sheet density of 2DEG on ZnMgO thickness and Mg composition exhibits an excellent agreement with the theoretical calculations based on the surface charge model. It indicates that the mobile electrons in 2DEG are originated from the donor-like surface states. Moreover, the anomalous periodicity of Shubnikov-de Haas oscillations has been observed and the partial spin polarization feature of 2DEG has also been demonstrated, which exhibits the promising development in oxide spintronics applications.

KW - Metal-organic vapor phase epitaxy

KW - Polar oxides

KW - Two-dimensional electron gas

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M3 - Article

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JO - Physica Status Solidi (C) Current Topics in Solid State Physics

JF - Physica Status Solidi (C) Current Topics in Solid State Physics

IS - 10

ER -

Origin and transport properties of two-dimensional electron gas at ZnMgO/ZnO interface grown by MOVPE

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