Quantum critical point description of the 2D metal–insulator transition

✍ Scribed by D.J.W. Geldart; D. Neilson

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 166 KB
• Volume: 40
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.08.029

✦ Synopsis

We argue that a quantum critical point associated with the putative metal-insulator transition phenomenon in 2D controls not only the usual quantum critical sector but also a range of the low temperature insulator sector. The extended range of criticality permits a unified analysis of data from the insulating critical sector and quantum critical sector. Both the dynamical critical exponent z and the correlation length critical exponent n can then be determined from published data from a single experiment in the insulator critical region. The resulting value of zn is consistent with the T dependence of the resistivity in the quantum critical sector which provides support for the presence of a quantum critical point.