Schmidt, Felix M.; Diehl, Hans-Werner:
Crossover from attractive to repulsive Casimir forces and vice versa
In: Physical Review Letters, Jg. 101 (2008), Heft 10, Artikel 100601
2008Artikel/Aufsatz in ZeitschriftOpen Access
Physik (inkl. Astronomie)Fakultät für PhysikZentrale Serviceeinrichtungen » Universitätsbibliothek (UB)
Damit verbunden: 1 Publikation(en)
Titel in Englisch:
Crossover from attractive to repulsive Casimir forces and vice versa
Autor*in:
Schmidt, Felix M.UDE
LSF ID
46892
ORCID
0000-0002-9277-7954ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Diehl, Hans-WernerUDE
LSF ID
10365
ORCID
0000-0002-6283-8947ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
Erscheinungsjahr:
2008
Open Access?:
Open Access
arXiv.org ID
Scopus ID
Sprache des Textes:
Englisch

Abstract in Englisch:

Systems described by an O(n) symmetrical 4 Hamiltonian are considered in a d-dimensional film geometry at their bulk critical points. The critical Casimir forces between the film's boundary planes Bj, j=1,2, are investigated as functions of film thickness L for generic symmetry-preserving boundary conditions n=cj. The L-dependent part of the reduced excess free energy per cross-sectional area takes the scaling form fresD(c1LΦ/ν,c2LΦ/ν)/ Ld-1 when d<4, where ci are scaling fields associated with the variables ci and Φ is a surface crossover exponent. Explicit two-loop renormalization group results for the function D(c1,c2) at d=4- dimensions are presented. These show that (i)the Casimir force can have either sign, depending on c1 and c2, and (ii)for appropriate choices of the enhancements cj, crossovers from attraction to repulsion and vice versa occur as L increases. © 2008 The American Physical Society.