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Band structure and localization of electronic states of 2DEG in an inhomogeneous magnetic field

Published online by Cambridge University Press:  13 October 2014

Xiao Wei Zhang ,
Sun Yu Mou ,
Yu Liang Liu  and
Bo Dai
Xiao Wei Zhang*
Affiliation:
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, P.R. China
Sun Yu Mou
Affiliation:
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, P.R. China
Yu Liang Liu
Affiliation:
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, P.R. China
Bo Dai
Affiliation:
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, P.R. China
*
ae-mail: [email protected]
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Abstract

Based on the finite-differences approach, we study the electronic properties of two-dimensional electron gas under an inhomogeneous magnetic field. Such structure can be realized by deposition of ferromagnetic strips on the surface of a semiconductor heterostructure. It is found that the system exhibits rich band structures. Many bound states are twofold degenerate for θ = π/2, which defines the magnetization direction in the ferromagnetic strips, while few degenerate state exist for θ = 0. Despite of this, there are three kinds of electronic states in our system: the extended, localized and intermediate ones, which is very different from the case of absence of magnetic field.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 68 , Issue 1 , October 2014 , 10201
Copyright
© EDP Sciences, 2014

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