TY - JOUR

T1 - Theory of first-order layering transitions in thin helium films

AU - Saslow, W.

AU - Agnolet, G.

AU - Campbell, Charles E

AU - Krotscheck, E.

PY - 1996

Y1 - 1996

N2 - Thin liquid (Formula presented) films on graphite show evidence of layered growth with increasing number density via a succession of first-order phase transitions. These so-called "layering transitions" separate uniformly covering phases, such as monolayers and bilayers. The present work is a detailed theoretical study of such layering transitions using a Maxwell construction. We model the graphite surface by a strong substrate potential, and using a microscopic variational theory we obtain the uniform coverage solutions for liquid helium. For each layer, the theory yields the chemical potential (Formula presented) and surface tension (Formula presented) as functions of coverage (Formula presented), and from this we deduce (Formula presented). For each set of adjacent layers, we then obtain the crossing point in the curves of (Formula presented). In this way we obtain the values of (Formula presented), (Formula presented), and surface coverages for the transition. Particular attention is paid to the monolayer-bilayer transition.

AB - Thin liquid (Formula presented) films on graphite show evidence of layered growth with increasing number density via a succession of first-order phase transitions. These so-called "layering transitions" separate uniformly covering phases, such as monolayers and bilayers. The present work is a detailed theoretical study of such layering transitions using a Maxwell construction. We model the graphite surface by a strong substrate potential, and using a microscopic variational theory we obtain the uniform coverage solutions for liquid helium. For each layer, the theory yields the chemical potential (Formula presented) and surface tension (Formula presented) as functions of coverage (Formula presented), and from this we deduce (Formula presented). For each set of adjacent layers, we then obtain the crossing point in the curves of (Formula presented). In this way we obtain the values of (Formula presented), (Formula presented), and surface coverages for the transition. Particular attention is paid to the monolayer-bilayer transition.

UR - http://www.scopus.com/inward/record.url?scp=0004447698&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0004447698&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.54.6532

DO - 10.1103/PhysRevB.54.6532

M3 - Article

AN - SCOPUS:0004447698

SN - 1098-0121

VL - 54

SP - 6532

EP - 6538

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

ER -