One-dimensional electron system with attractive interaction in a magnetic field

✍ Scribed by G. I. Japaridze; A. A. Nersesyan

• Publisher: Springer US
• Year: 1979
• Tongue: English
• Weight: 699 KB
• Volume: 37
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00114059

✦ Synopsis

The phase transition with respect to a magnetic field from a nonmagnetic (h < A) to a paramagnetic (h > A) state at zero temperature in a one-dimensional electron system with attractive interaction is studied. An exact solution o/the Luther-Emery model for a particular value of the coupling constant UII = -67rvv/ 5 is used. The transition shows up as the appearance of a gapless mode in the spin-excitation spectrum at the critical field hc =/% where h is the gap in the spectrum in zero fieM. The behavior of various correlation functions and the low-temperature anomalies of the thermodynamic quantities are calculated. Some questions related to a quantitative description of the transition in the Luther-Emery model for UII #-6rrvv/5, and also in other models, are discussed.