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

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Dobson, JF
Le, HM
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2002
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Abstract

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.

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Physical Review B: Condensed Matter and Materials Physics

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66

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© 2002 American Physical Society. Reproduced in accordance with the copyright policy of the publisher. This journal is available online - use hypertext links.

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