Low Temperature Physics: 37, 919 (2011); https://doi.org/10.1063/1.3672160 (6 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 11 (November 2011), p. 1156-1162    ( to contents , go back )

Collective excitations of the electron gas on the nanotube surface in magnetic field

A.M. Ermolaev, G.I. Rashba, and M.A. Solyanik

V. Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61077, Ukraine
E-mail: alexander.m.ermolaev@univer.kharkov.ua
georgiy.i.rashba@univer.kharkov.ua

pos Анотація:

Received Marcg 18, 2011

Abstract

The spectra of magnetoplasma waves, zero sound and spin waves in the electron gas on the surface of nonferromagnetic nanotube in longitudinal magnetic field are considered. The primed spectrum of the electron energy is supposed to be parabolic, and the electron- electron interaction is taken into account in the random phase approximation. The plasmon intersubband frequency shift is proved to take place. It is proportional to the change of magnetic flow running though the tube cross-section. The magnetoplasma waves frequency and damping decrement in a nondegenerate electron gas are calculated. The zero sound and spin waves frequencies oscillate as the de Haasvan Alphen and Aharonov–Bohm types with changing the electron density and magnetic flux. This phenomenon takes place in a degenerate electron gas with a great number of populated subbands.

PACS: 71.45.–d Collective effects;
PACS: 73.20. Mf Collective excitations (including plasmons and other charge-density excitations);
PACS: 75.30 Ds Spin waves;
PACS: 78.67.Ch Nanotubes.

Key words: nanotubes, magnetoplasmons, zero sound, spin waves.

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