Low-temperature quantum critical behaviour of systems with transverse Ising-like intrinsic dynamics

✍ Scribed by A. Caramico D'Auria; L. De Cesare; I. Rabuffo

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 234 KB
• Volume: 327
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/s0378-4371(03)00403-5

✦ Synopsis

The low-temperature properties and crossover phenomena of d-dimensional transverse Isinglike systems within the in uence domain of the quantum critical point are investigated solving the appropriate one-loop renormalization group equations. The phase diagram is obtained near and at d = 3 and several sets of critical exponents are determined which describe di erent responses of a system to quantum uctuations according to the way of approaching the quantum critical point. The results are in remarkable agreement with experiments for a wide variety of compounds exhibiting a quantum phase transition, as the ferroelectric oxides and other displacive systems.