Naslov
Nonlocal microscopic theory of quantum friction between parallel metallic slabs

Autori
Despoja, Vito ; Echenique, Pedro M. ; Šunjić, Marijan

Izvornik
Physical review. B, Condensed matter and materials physics (1098-0121) 83 (2011), 20; 205424, 10

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quantum friction ; nonlocal response ; Drude and plasmon models

Sažetak
We present a new derivation of the friction force between two metallic slabs moving with constant relative parallel velocity, based on T=0 quantum field theory formalism. By including fully nonlocal description of dynamically screened electron fluctuations in the slab, and avoiding the usual matching condition procedure, we generalise previous expressions for the friction force, to which our results reduce in the local limit. Analyzing the friction force calculated in the two local models and in the nonlocal theory we show that for physically relevant velocities local theories using the plasmon and Drude models of dielectric response are inappropriate to describe friction, which is due to excitation of low energy electron-hole pairs which are properly included in nonlocal theory. We also show that inclusion of dissipation in the nonlocal electronic response has negligible influence on friction.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA