Phase transitions in tetrahedral Ising lattices
Author
Kabakçıoğlu, Alkan
Advisor
Yalabık, Cemal
Date
1993Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
After a review of the Renormalization CJroup theory, the phase diagram
of unisotro])ic tetrahedral Ising lattice is explored l)y the motivation gained
through the recent experimental findings about SiGe alloys. Renormalization
Group approcich and the mean-field R(J approximation previously pro])osed
by Kinzel ¿ire used. Four different ordered pluises are olxserved. The critical
expoiKMit // is Ciih’uhited using the liiUNirized t.ra.nsform<ition ¿iround the fixed
points and ('om|)fii’ed with previous works. It is ('oiu'luded tluit the newly
observed orderings in Si(!e superlattices are induced by surface effects.