Quantum effects in an n-component vector model for structural phase transitions
Abstract
The influence of quantum effects on the critical properties of an n-component vector model for structural phase transitions is explored. It is shown for n = 1, 2, and ∞ that these effects can suppress the occurrence of a phase transition for all dimensions d. This turns out to be of particular relevance for systems where the classical transition temperature almost vanishes (Tc=0 represents the displacive limit). We also discuss the critical properties at this limit for n = ∞ and show that the critical exponents change discontinously.
- Publication:
-
Physical Review B
- Pub Date:
- February 1976
- DOI:
- 10.1103/PhysRevB.13.1123
- Bibcode:
- 1976PhRvB..13.1123S