Symmetry of hole spin transport in a two-terminal quantum system
(2006) In Physical Review B (Condensed Matter and Materials Physics) 74(23).- Abstract
- We study two-terminal hole spin transport in a p-type, light-hole-heavy-hole coupled, quantum-well system under the influence of Rashba spin-orbit interaction. An expression for the spin polarization of the outgoing hole flux is derived. It is shown that the in-plane spin polarization vanishes identically whenever the outgoing lead supports only heavy-hole channels. This result is independent of the details of the system. By analyzing the symmetries of the system, constraints on the spin-dependent transmission amplitudes are derived. It is shown that under time-reversal symmetry, the total hole spin polarization vanishes whenever the outgoing lead supports only one spin-degenerate hole channel, which is also independent of the details of... (More)
- We study two-terminal hole spin transport in a p-type, light-hole-heavy-hole coupled, quantum-well system under the influence of Rashba spin-orbit interaction. An expression for the spin polarization of the outgoing hole flux is derived. It is shown that the in-plane spin polarization vanishes identically whenever the outgoing lead supports only heavy-hole channels. This result is independent of the details of the system. By analyzing the symmetries of the system, constraints on the spin-dependent transmission amplitudes are derived. It is shown that under time-reversal symmetry, the total hole spin polarization vanishes whenever the outgoing lead supports only one spin-degenerate hole channel, which is also independent of the details of the system. It is further shown that generally it is difficult to achieve spin polarized currents from a laterally defined Rashba hole device without breaking its transverse reflection symmetry. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/679886
- author
- Brusheim, Patrik LU and Xu, Hongqi LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 74
- issue
- 23
- article number
- 233306
- publisher
- American Physical Society
- external identifiers
-
- wos:000243195700013
- scopus:33845761427
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.74.233306
- language
- English
- LU publication?
- yes
- id
- e7e7820e-528d-4ab7-9153-1629b769cde5 (old id 679886)
- date added to LUP
- 2016-04-01 16:48:41
- date last changed
- 2022-01-28 22:17:47
@article{e7e7820e-528d-4ab7-9153-1629b769cde5,
abstract = {{We study two-terminal hole spin transport in a p-type, light-hole-heavy-hole coupled, quantum-well system under the influence of Rashba spin-orbit interaction. An expression for the spin polarization of the outgoing hole flux is derived. It is shown that the in-plane spin polarization vanishes identically whenever the outgoing lead supports only heavy-hole channels. This result is independent of the details of the system. By analyzing the symmetries of the system, constraints on the spin-dependent transmission amplitudes are derived. It is shown that under time-reversal symmetry, the total hole spin polarization vanishes whenever the outgoing lead supports only one spin-degenerate hole channel, which is also independent of the details of the system. It is further shown that generally it is difficult to achieve spin polarized currents from a laterally defined Rashba hole device without breaking its transverse reflection symmetry.}},
author = {{Brusheim, Patrik and Xu, Hongqi}},
issn = {{1098-0121}},
language = {{eng}},
number = {{23}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Symmetry of hole spin transport in a two-terminal quantum system}},
url = {{http://dx.doi.org/10.1103/PhysRevB.74.233306}},
doi = {{10.1103/PhysRevB.74.233306}},
volume = {{74}},
year = {{2006}},
}