Effect of bulk magnetic field on critical Ising films

Citation
A. Drzewinski et al., Effect of bulk magnetic field on critical Ising films, PHYS REV E, 61(5), 2000, pp. 5009-5018
Citations number
29
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW E
ISSN journal
1063651X → ACNP
Volume
61
Issue
5
Year of publication
2000
Part
A
Pages
5009 - 5018
Database
ISI
SICI code
1063-651X(200005)61:5<5009:EOBMFO>2.0.ZU;2-G
Abstract
Two-dimensional Ising films Lx infinity in a nonvanishing bulk magnetic fie ld H are studied at the bulk critical temperature T-c for two choices of su rface fields (a) H-1=H-L=0 (ordinary transition), and (b) H-1=H-L=infinity (normal transition) by the density-matrix renormalization-group method. Uni versal scaling functions for magnetization profiles, the excess magnetizati on Gamma, the longitudinal correlation length xi parallel to, and for the a nalog of the solvation force f(solv) are found and discussed. When H-1=0 th e scaling function for f(solv) has two symmetric minima at y = sgn(H)L\H\ ( v/Delta) approximate to +/- 1 with an amplitude at the minimum about 3.8 ti mes the value at H=0, the Casimir amplitude. For the normal transition the scaling function for f(solv) has a single minimum near the continuation of the pseudocoexistence (capillary condensation) line, with an amplitude abou t 100 times the Casimir amplitude.