Influence of surface electronic structure on quantum friction between Ag(111) slabs

Despoja, Vito and Silkin, Vyacheslav M. and Echenique, Pedro M. and Šunjić, Marijan (2015) Influence of surface electronic structure on quantum friction between Ag(111) slabs. Physical Review B, 92 (12). pp. 125424-10. ISSN 1098-0121

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Abstract

The theoretical formulation developed in Phys. Rev. B 83, 205424 (2011) is applied to explore how surface electronic structure modifies the noncontact friction force between two silver slabs. We find that the friction shows three distinct regimes for different thicknesses. For very thin slabs N=1–7 monolayers (ML) quantum friction vs velocity shows oscillations which are due to the quantum size effect. At about 10ML friction rapidly increases because the surface state energies fall below E_F, which opens a new intraband electron-hole excitation channel. And for N>15 the friction is strongly enhanced due to the excitation of acoustic surface plasmons.

Item Type: Article
Date: 16 September 2015
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2015) by the American Physical Society. Received 19 June 2015; Revised manuscript received 3 September 2015; Published 16 September 2015.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 22 Sep 2015 13:09
Last Modified: 02 Dec 2017 17:45
URI: http://digre.pmf.unizg.hr/id/eprint/4233

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