Europhys. Lett.
Volume 71, Number 3, August 2005
Page(s) 425 - 430
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 29 June 2005
Europhys. Lett., 71 (3), pp. 425-430 (2005)
DOI: 10.1209/epl/i2005-10089-y

Soliton phase near antiferromagnetic quantum critical point in Q1D conductors

L. P. Gor'kov1, 2 and P. D. Grigoriev1, 2

1  National High Magnetic Field Laboratory, Florida State University Tallahassee, FL 32306-4005, USA
2  L. D. Landau Institute for Theoretical Physics - Chernogolovka, Russia

received 6 April 2005; accepted in final form 27 May 2005
published online 29 June 2005

In frameworks of a nesting model for Q1D organic conductors at the antiferromagnetic (SDW) quantum critical point, the first-order transition separates the metallic state from the soliton phase having periodic domain structure. The low-temperature phase diagram also displays a 2nd-order transition line between the soliton and the uniformly gapped SDW phases. The results agree with the phase diagram of (TMTSF)2PF6 near critical pressure (Vuletic T. et al. , Eur. Phys. J. B 25 (2002) 319). The detection of the 2nd-order transition line is discussed. We comment on superconductivity at low temperature.

71.30.+h - Metal-insulator transitions and other electronic transitions.
74.70.Kn - Organic superconductors.
75.30.Fv - Spin-density waves.

© EDP Sciences 2005