Effective mass of the two-dimensional electron gas and band nonparabolicity in AlxGa1-xN/GaN heterostructures

N. Tang; B. Shen; M. J. Wang; Z. J. Yang; K. Xu; G. Y. Zhang; T. Lin; B. Zhu; W. Z. Zhou; J. H. Chu

doi:10.1063/1.2197306

Effective mass of the two-dimensional electron gas and band nonparabolicity in Al_xGa_1-xN/GaN heterostructures

N. Tang^*
, B. Shen
, M. J. Wang
, Z. J. Yang
, K. Xu
, G. Y. Zhang
, T. Lin
, B. Zhu
, W. Z. Zhou
, J. H. Chu

^*Corresponding author for this work

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

21 Scopus citations

Abstract

Magnetotransport study has been performed on Alx Ga1-x NGaN heterostructures at low temperatures and high magnetic fields. Effective-mass values of the two-dimensional electron gas (2DEG) in the triangular quantum well at the heterointerfaces are obtained by analyzing the temperature-dependent Shubnikov-de Haas oscillations. It is found that the values have strong dependence on the magnetic field and the 2DEG density. Our results show that the effective mass increases 0.01 m0 T and 0.0027 m0 electron density of 1012 cm-2. Such behavior is thought to be due to the conduction band nonparabolicity in GaN. The extrapolated band edge effective mass of m0* = (0.145±0.006) m0 is obtained, which is smaller than most reports that neglected the influence of the magnetic field in Alx Ga1-x NGaN heterostructures.

Original language	English
Article number	172115
Journal	Applied Physics Letters
Volume	88
Issue number	17
DOIs	https://doi.org/10.1063/1.2197306
State	Published - 2006
Externally published	Yes

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@article{80993d1c3d444c8684ef791c1f0b42a7,

title = "Effective mass of the two-dimensional electron gas and band nonparabolicity in AlxGa1-xN/GaN heterostructures",

abstract = "Magnetotransport study has been performed on Alx Ga1-x NGaN heterostructures at low temperatures and high magnetic fields. Effective-mass values of the two-dimensional electron gas (2DEG) in the triangular quantum well at the heterointerfaces are obtained by analyzing the temperature-dependent Shubnikov-de Haas oscillations. It is found that the values have strong dependence on the magnetic field and the 2DEG density. Our results show that the effective mass increases 0.01 m0 T and 0.0027 m0 electron density of 1012 cm-2. Such behavior is thought to be due to the conduction band nonparabolicity in GaN. The extrapolated band edge effective mass of m0* = (0.145±0.006) m0 is obtained, which is smaller than most reports that neglected the influence of the magnetic field in Alx Ga1-x NGaN heterostructures.",

author = "N. Tang and B. Shen and Wang, \{M. J.\} and Yang, \{Z. J.\} and K. Xu and Zhang, \{G. Y.\} and T. Lin and B. Zhu and Zhou, \{W. Z.\} and Chu, \{J. H.\}",

year = "2006",

doi = "10.1063/1.2197306",

language = "英语",

volume = "88",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "17",

}

TY - JOUR

T1 - Effective mass of the two-dimensional electron gas and band nonparabolicity in AlxGa1-xN/GaN heterostructures

AU - Tang, N.

AU - Shen, B.

AU - Wang, M. J.

AU - Yang, Z. J.

AU - Xu, K.

AU - Zhang, G. Y.

AU - Lin, T.

AU - Zhu, B.

AU - Zhou, W. Z.

AU - Chu, J. H.

PY - 2006

Y1 - 2006

N2 - Magnetotransport study has been performed on Alx Ga1-x NGaN heterostructures at low temperatures and high magnetic fields. Effective-mass values of the two-dimensional electron gas (2DEG) in the triangular quantum well at the heterointerfaces are obtained by analyzing the temperature-dependent Shubnikov-de Haas oscillations. It is found that the values have strong dependence on the magnetic field and the 2DEG density. Our results show that the effective mass increases 0.01 m0 T and 0.0027 m0 electron density of 1012 cm-2. Such behavior is thought to be due to the conduction band nonparabolicity in GaN. The extrapolated band edge effective mass of m0* = (0.145±0.006) m0 is obtained, which is smaller than most reports that neglected the influence of the magnetic field in Alx Ga1-x NGaN heterostructures.

AB - Magnetotransport study has been performed on Alx Ga1-x NGaN heterostructures at low temperatures and high magnetic fields. Effective-mass values of the two-dimensional electron gas (2DEG) in the triangular quantum well at the heterointerfaces are obtained by analyzing the temperature-dependent Shubnikov-de Haas oscillations. It is found that the values have strong dependence on the magnetic field and the 2DEG density. Our results show that the effective mass increases 0.01 m0 T and 0.0027 m0 electron density of 1012 cm-2. Such behavior is thought to be due to the conduction band nonparabolicity in GaN. The extrapolated band edge effective mass of m0* = (0.145±0.006) m0 is obtained, which is smaller than most reports that neglected the influence of the magnetic field in Alx Ga1-x NGaN heterostructures.

UR - https://www.scopus.com/pages/publications/33646399497

U2 - 10.1063/1.2197306

DO - 10.1063/1.2197306

M3 - 文章

AN - SCOPUS:33646399497

SN - 0003-6951

VL - 88

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

M1 - 172115

ER -

Effective mass of the two-dimensional electron gas and band nonparabolicity in Al_xGa_1-xN/GaN heterostructures

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