Experimental Determination of a Two-Dimensional Liquid-Vapor Critical-Point Exponent
Abstract
The liquid-vapor coexistence boundary of submonolayer CH4 adsorbed on graphite was mapped out in an extensive ac heat-capacity study. The order-parameter exponent β that describes the shape of the liquid-vapor coexistence boundary was found to be 0.127 +/- 0.020. This is in good agreement with 18, the exact value calculated for a two-dimensional Ising-model system.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 1984
- DOI:
- 10.1103/PhysRevLett.53.170
- Bibcode:
- 1984PhRvL..53..170K
- Keywords:
-
- 67.70.+n;
- 64.70.Fx;
- 68.55.+b;
- Films;
- Liquid-vapor transitions