Renormalization group for phases with broken discrete symmetry near quantum critical points

P. Jakubczyk, P. Strack, A. A. Katanin, W. Metzner

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

We extend the Hertz-Millis theory of quantum phase transitions in itinerant electron systems to phases with broken discrete symmetry. By using a set of coupled flow equations derived within the functional renormalization group framework, we compute the second order phase transition line Tc (δ), where δ is a nonthermal control parameter, near a quantum critical point. We analyze the interplay and relative importance of quantum and classical fluctuations at different energy scales, and we compare the Ginzburg temperature TG to the transition temperature Tc, the latter being associated with a non-Gaussian fixed point.

Original languageEnglish
Article number195120
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number19
DOIs
Publication statusPublished - 22 May 2008
Externally publishedYes

Fingerprint

Dive into the research topics of 'Renormalization group for phases with broken discrete symmetry near quantum critical points'. Together they form a unique fingerprint.

Cite this