標題: Transmission properties of electrons in a T-type opened quantum waveguide with inhomogeneous magnetic fields
作者: Chen, K
Gu, BY
Lin, YK
Chuu, DS
電子物理學系
Department of Electrophysics
公開日期: 30-三月-1999
摘要: We calculate the quantum-mechanical transmission of electrons in a T-shaped opened quantum waveguide (TOQW) subjected to an inhomogeneous magnetic field perpendicular to the TOQW plane with the use of the mode-matching technique. An electron incident through one branch of the waveguide can travel into the other two channels in the quantum ballistic regime. We find that transmission coefficients in two channels exhibit quite difference from each other and depend sensitively on geometric parameters and magnetic configurations. Sharp peaks with unity amplitude and deep dips are observed in transmission spectrum as a function of the Fermi energy of the incident electrons at some high fields. We also study the variation of transmission with magnetic field and find that the transmission exhibits various patterns such as step drop, deep dips, wide valley, large oscillations, or without any structure, sensitively depending on the incident electron energy and magnetic confinement configurations. It is expected that by applying inhomogeneous magnetic fields to the TOQW with appropriate magnetic configuration one may provide an available way to control transmission property of the TOQW to match practical requirements in devices.
URI: http://hdl.handle.net/11536/31441
ISSN: 0217-9792
期刊: INTERNATIONAL JOURNAL OF MODERN PHYSICS B
Volume: 13
Issue: 8
起始頁: 903
結束頁: 915
顯示於類別:期刊論文