|
Title
|
|
|
|
Spin-current modulation and square-wave transmission through periodically stubbed electron waveguides
|
|
|
Author
|
|
|
|
|
|
|
Abstract
|
|
|
|
| Ballistic spin transport through waveguides, with symmetric or asymmetric double stubs attached to them periodically, is studied systematically in the presence of a weak spin-orbit coupling that makes the electrons precess. By an appropriate choice of the waveguide length and of the stub parameters injected spin-polarized electrons can be blocked completely and the transmission shows a periodic and nearly-square-type behavior, with values 1 and 0, with wide gaps when only one mode is allowed to propagate in the waveguide. A similar behavior is possible for a certain range of the stub parameters even when two modes can propagate in the waveguide and the conductance is doubled. Such a structure is a good candidate for establishing a realistic spin transistor. A further modulation of the spin current can be achieved by inserting defects in a finite-number stub superlattice. Finite-temperature effects on the spin conductance are also considered. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
|
|
|
Publication
|
|
|
|
Lancaster, Pa
:
2002
|
|
|
ISSN
|
|
|
|
1098-0121
[print]
1550-235X
[online]
|
|
|
DOI
|
|
|
|
10.1103/PHYSREVB.65.165217
|
|
|
Volume/pages
|
|
|
|
65
:16
(2002)
, 10 p.
|
|
|
Article Reference
|
|
|
|
165217
|
|
|
ISI
|
|
|
|
000175325000061
|
|
|
Medium
|
|
|
|
E-only publicatie
|
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|
|
Full text (open access)
|
|
|
|
|
|