Issue |
EPL
Volume 113, Number 1, January 2016
|
|
---|---|---|
Article Number | 17001 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/113/17001 | |
Published online | 22 December 2015 |
Separated spin-up and spin-down evolution of degenerated electrons in two-dimensional systems: Dispersion of longitudinal collective excitations in plane and nanotube geometry
Faculty of physics, Lomonosov Moscow State University, Moscow, Russian Federation
(a) andreevpa@physics.msu.ru
(b) lsk@phys.msu.ru
Received: 1 April 2015
Accepted: 26 November 2015
Applying the separated spin evolution quantum hydrodynamics to the two-dimensional electron gas in plane samples and nanotubes located in external magnetic fields we have found a novel type of waves in the electron gas which is called spin-electron acoustic wave. A separate spin-up and spin-down electrons' evolution reveals the replacement of the Langmuir wave by a pair of hybrid waves. One of the two hybrid waves is a modified Langmuir wave. Another hybrid wave is a spin-electron acoustic wave. We studied the dispersion of these waves in two-dimensional structures of electrons. We also considered the dependence of dispersion properties on spin polarization of electrons in an external magnetic field.
PACS: 73.22.Lp – Collective excitations / 52.30.Ex – Two-fluid and multi-fluid plasmas / 52.35.Dm – Sound waves
© EPLA, 2015
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