Anomalous electron collimation in HgTe quantum wells with inverted band structure

We investigate the electron collimation behavior in HgTe quantum wells (QWs) with a magnetic-electric barrier induced by a ferromagnetic metal stripe. We find that electrons can transmit perfectly through the magnetic-electric barrier at some specific incidence angles. These angles can be controlled...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2013-02, Vol.25 (7), p.075801-075801, Article 075801
Main Authors: Zou, Y L, Zhang, L B, Song, J T
Format: Article
Language:English
Subjects:
Band structure of solids
Barriers
Collimation
Computer Simulation
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electromagnetic Fields
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport in multilayers, nanoscale materials and structures
Electrons
Exact sciences and technology
Fermi surfaces
Mercury - chemistry
Models, Chemical
Models, Molecular
Physics
Quantum Theory
Quantum wells
Tellurium - chemistry
Tuning
Voltage
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Summary:We investigate the electron collimation behavior in HgTe quantum wells (QWs) with a magnetic-electric barrier induced by a ferromagnetic metal stripe. We find that electrons can transmit perfectly through the magnetic-electric barrier at some specific incidence angles. These angles can be controlled by the tuning gate voltage, local magnetic field and Fermi energy of incident electrons in QWs with appropriate barrier length. This collimation feature can be used to construct momentum filters in HgTe QWs and has potential application in nanodevices.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/25/7/075801