Critical Casimir force in $^4$He films: confirmation of finite-size scaling

Details Critical Casimir force in $^4$He films: confirmation of finite-size scaling Critical Casimir force in $^4$He films: confirmation of finite-size scaling

2006-05-26

arxiv.org/abs/cond-mat/0605663v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.97.075301

We present new capacitance measurements of critical Casimir force-induced thinning of $^4$He films near the superfluid/normal transition, focused on the region below $T_{\lambda}$ where the effect is the greatest. $^4$He films of 238, 285, and 340 \AA thickness are adsorbed on N-doped silicon substrates with roughness $\approx 8 {\AA}$. The Casimir force scaling function $\vartheta $, deduced from the thinning of these three films, collapses onto a single universal curve, attaining a minimum $\vartheta = -1.30 \pm 0.03$ at $x=td^{1/\nu}=-9.7\pm 0.8 {\AA}^{1/\nu}$. The collapse confirms the finite-size scaling origin of the dip in the film thickness. Separately, we also confirm the presence down to $2.13 K$ of the Goldstone/surface fluctuation force, which makes the superfluid film $\sim 2 {\AA}$ thinner than the normal film.

Affiliated with

Also associated with

No associations

Rating

Critical Casimir force in $^4$He films: confirmation of finite-size scaling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Critical Casimir force in $^4$He films: confirmation of finite-size scaling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Critical Casimir force in $^4$He films: confirmation of finite-size scaling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-238362