Collisionless hydrodynamics for one-dimensional motion of inhomogeneous degenerate electron gases: Equivalence of two recent descriptions

Article

关键词: DENSITY-FUNCTIONAL THEORY;    PARABOLIC QUANTUM-WELLS;    SURFACE-PLASMONS;    LINEAR-RESPONSE;    EXCHANGE;    JELLIUM;    MODEL;    DISPERSION;    EXCITATIONS;    METALS;   

DOI  :  10.1103/PhysRevB.66.075301

来源: SCIE

【 摘 要 】

Recently Tokatly and Pankratov (TP) [Phys. Rev. B 60, 15 550 (1999)] used velocity moments of a classical kinetic equation to derive a hydrodynamic description of the motion of an electron gas. Independently, the present authors [Theochem 501-502, 327 (2000)] used considerations arising from the Harmonic Potential Theorem [Phys. Rev. Lett. 73, 2244 (1994)] to generate a form of high-frequency hydrodynamics for inhomogeneous degenerate electron gases (HPT-N3 hydrodynamics). We show here that TP hydrodynamics yields HPT-N3 hydrodynamics when linearized about a Thomas-Fermi ground state with one-dimensional spatial inhomogeneity.

【 授权许可】

Free