Proposal for an ac spin current source
Hofer, Patrick P. LU
; Aramberri, Hugo
; Schenke, Christoph
and Delplace, Pierre A.L.
(2014)
In EPL
107(2).
- Abstract
We propose an ac current source that can be tuned from a pure charge to a pure spin current source. The device consists of two mesoscopic capacitors attached to a two-dimensional strip of a topological insulator. The change from charge to spin current is controlled by an offset in the top gate potentials that drive the capacitors. In addition to this setup, which anticipates the experimental realisation of quantum point contacts in topological insulators, we propose an analogous source in the quantum Hall regime which only relies on presently available building blocks. To this end, we calculate the band structure of a topological insulator in a magnetic field. The intrinsic spin-orbit coupling, together with a split gate, allows for an... (More)
We propose an ac current source that can be tuned from a pure charge to a pure spin current source. The device consists of two mesoscopic capacitors attached to a two-dimensional strip of a topological insulator. The change from charge to spin current is controlled by an offset in the top gate potentials that drive the capacitors. In addition to this setup, which anticipates the experimental realisation of quantum point contacts in topological insulators, we propose an analogous source in the quantum Hall regime which only relies on presently available building blocks. To this end, we calculate the band structure of a topological insulator in a magnetic field. The intrinsic spin-orbit coupling, together with a split gate, allows for an analogous source, where charge and spin current can be manipulated. The realisation of the device as well as the detection of the ac spin current are within reach of the present experimental technology.
(Less)
- author
- Hofer, Patrick P.
LU
; Aramberri, Hugo
; Schenke, Christoph
and Delplace, Pierre A.L.
- publishing date
- 2014-07-01
- type
- Contribution to journal
- publication status
- published
- in
- EPL
- volume
- 107
- issue
- 2
- article number
- 27003
- publisher
- EDP Sciences
- external identifiers
-
- scopus:84904876600
- ISSN
- 0295-5075
- DOI
- 10.1209/0295-5075/107/27003
- language
- English
- LU publication?
- no
- id
- bb563b16-bc5c-4471-83d8-6591ea78f7fa
- date added to LUP
- 2019-05-14 09:52:18
- date last changed
- 2022-01-31 19:50:23
@article{bb563b16-bc5c-4471-83d8-6591ea78f7fa,
abstract = {{<p>We propose an ac current source that can be tuned from a pure charge to a pure spin current source. The device consists of two mesoscopic capacitors attached to a two-dimensional strip of a topological insulator. The change from charge to spin current is controlled by an offset in the top gate potentials that drive the capacitors. In addition to this setup, which anticipates the experimental realisation of quantum point contacts in topological insulators, we propose an analogous source in the quantum Hall regime which only relies on presently available building blocks. To this end, we calculate the band structure of a topological insulator in a magnetic field. The intrinsic spin-orbit coupling, together with a split gate, allows for an analogous source, where charge and spin current can be manipulated. The realisation of the device as well as the detection of the ac spin current are within reach of the present experimental technology.</p>}},
author = {{Hofer, Patrick P. and Aramberri, Hugo and Schenke, Christoph and Delplace, Pierre A.L.}},
issn = {{0295-5075}},
language = {{eng}},
month = {{07}},
number = {{2}},
publisher = {{EDP Sciences}},
series = {{EPL}},
title = {{Proposal for an ac spin current source}},
url = {{http://dx.doi.org/10.1209/0295-5075/107/27003}},
doi = {{10.1209/0295-5075/107/27003}},
volume = {{107}},
year = {{2014}},
}