Application of the Lifshitz Theory to Poor Conductors

2008/09/23 by V. B. Svetovoy, Vitaly B. Svetovoy · 2 citations
Engineering · Physics and Astronomy · #Cosmology and Gravitation Theories #Quantum Electrodynamics and Casimir Effect #Thermal Radiation and Cooling Technologies #cond-mat.mtrl-sci #quant-ph

paper · pdf · doi:10.1103/physrevlett.101.163603

published as Phys. Rev. Lett. 101, 163603 (2008) · Accepted for publication in PRL

arxiv created 2008/09/23 · openalex publication_date 2008/10/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

The Lifshitz formula for dispersive forces is generalized to the materials, which cannot be described with the local dielectric response. The principal nonlocality of poor conductors is related to the finite screening length of the penetrating field and collisional relaxation; at low temperatures the role of collisions plays the Landau damping. Spatial dispersion makes the theory self-consistent. Our predictions are compared with the recent experiment. It is demonstrated that at low temperatures Casimir-Lifshitz entropy disappears as T in the case of degenerate plasma and as T2 for the nondegenerate one.

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