Thomas-Fermi-Dirac-von Weizsacker hydrodynamics in laterally modulated electronic systems

Article

关键词: MAGNETOPLASMA MODES;    PERIODIC ARRAY;    CHARGE-DENSITY;    QUANTUM WIRES;    GAS;    EXCITATIONS;    PLASMONS;    HETEROJUNCTIONS;    ABSORPTION;    CHANNELS;   

DOI  :  10.1103/PhysRevB.59.2079

来源: SCIE

【 摘 要 】

We have studied the collective plasma excitations of a two-dimensional electron gas with an arbitrary lateral charge-density modulation. The dynamics is formulated using a previously developed hydrodynamic theory based on the Thomas-Fermi-Dirac-von Weizsacker approximation. In this approach, both the equilibrium and dynamical properties of the periodically modulated electron gas are treated ina consistent fashion. We pay particular attention to the evolution of the collective excitations as the system undergoes the transition from the ideal two-dimensional limit to the highly localized one-dimensional limit. We also calculate the power absorption in the long-wavelength limit to illustrate the effect of the modulation on the modes probed by far-infrared transmission spectroscopy. [S0163-1829(99)10403-X].

【 授权许可】

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