Spin-fermion model near the quantum critical point: one-loop renormalization group results

Research output: Contribution to journalArticle

116 Scopus citations

Abstract

The properties of the antiferromagnetic quantum critical point for itinerant electrons were explored by expanding in the inverse number of hot spots in the Brillouin zone N = 8. By going beyond a self-consistent N = ∞ theory, it was found that the Fermi surface becomes nested at hot spots which is a weak spin-density wave (SDW) precursor effect, and vertex corrections account for anomalous spin dynamics and change the dynamical critical exponent from z = 2 to z > 2. To first order in 1/N, z = 2N/(N - 2) ≈ 2.67 was found.

Original languageEnglish (US)
Pages (from-to)5608-5611
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number24
DOIs
StatePublished - Jun 12 2000
Externally publishedYes

Fingerprint Dive into the research topics of 'Spin-fermion model near the quantum critical point: one-loop renormalization group results'. Together they form a unique fingerprint.

  • Cite this