https://doi.org/10.1051/epjap/2014140088
Band structure and localization of electronic states of 2DEG in an inhomogeneous magnetic field
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang
621010, P.R. China
a e-mail: xwzhang1980@gmail.com
Received:
3
March
2014
Revised:
26
June
2014
Accepted:
15
September
2014
Published online:
13
October
2014
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.
© EDP Sciences, 2014
