Prog. Theor. Phys. Vol. 65 No. 5 (1981) pp. 1493-1503
Phase Transitions in Adsorbed Systems
Department of Physics, Kyushu University, Fukuoka 812
(Received December 12, 1980)
Possible phase transitions in adsorbed monolayers are discussed. Nature of the transitions is divided into two classes by a parameter p which is the ratio of an adsorbate lattice constant to a sbstrate lattice constant. When p is greater than some special value Pc, the system is described by a two-component sine-Gordon model and would exhibit two Kosterlitz Thouless like phase transitions as shown by Nelson and Halperin. On the other hand an orderdisorde transition would occur for p<pc. A two-componet Zp model is applied to clarify the transition. It is shown in the present approach that the transition is continuous for p≤2 while it becomes first order for 2<p<pc.
DOI : 10.1143/PTP.65.1493
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Citing Article(s) :
Progress of Theoretical Physics Vol. 66 No. 6 (1981) pp. 2276-2279
Critical Point of Two-Layered Potts Model Coupled with Four-Body Interaction