Intersubband plasmons in quasi-one-dimensional electron systems on a liquid helium surface

Details Intersubband plasmons in quasi-one-dimensional electron systems on a liquid helium surface Intersubband plasmons in quasi-one-dimensional electron systems on a liquid helium surface

2003-09-12

arxiv.org/abs/cond-mat/0309323v1

Physics

Condensed Matter

Strongly Correlated Electrons

To be published as a Rapid Communication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.140504

The collective excitation spectra are studied for a multisubband quasi-one-dimensional electron gas on the surface of liquid helium. Different intersubband plasmon modes are identified by calculating the spectral weight function of the electron gas within a 12 subband model. Strong intersubband coupling and depolarization shifts are found. When the plasmon energy is close to the energy differences between two subbands, Landau damping in this finite temperature system leads to plasmon gaps at small wavevectors.

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