Please use this identifier to cite or link to this item:
|Title:||Spin filtering in a two-dimensional electron gas device with asymmetric spatially spread magnetic-electric barriers|
|Citation:||Jalil, M.B.A. (2005-01-15). Spin filtering in a two-dimensional electron gas device with asymmetric spatially spread magnetic-electric barriers. Journal of Applied Physics 97 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.1835568|
|Abstract:||We calculate, based on the effective mass Hamiltonian, the spin dependence of ballistic transport through a two-dimensional electron gas (2DEG) under the influence of an electric U and a pair of magnetic B barriers with finite spatial width. The spin polarization of electron transmission P is strongly dependent on the degree of asymmetry in the magnetic barriers. An asymmetry in the B barrier widths and heights which conserves the magnetic vector potential A along the conduction path leads to a low P of less than 1% in the high transmission region. If conservation of A is broken, much higher P values of up to 30% is achievable but at the cost of increasing the energy threshold Eth. Finally, we suggest a scheme which utilizes a thin break in the 2DEG conduction path to achieve a comparable modulation of P of 25%, while conserving A and maintaining Eth at moderate electron energies. © 2005 American Institute of Physics.|
|Source Title:||Journal of Applied Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Oct 15, 2018
WEB OF SCIENCETM
checked on Oct 8, 2018
checked on Oct 13, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.