Spin density wave – metal (superconductor) competition: A phase segregation scenario

C. Pasquier; M. Héritier; D. Jérome

doi:doi:10.1051/jp4:20020355

Issue		J. Phys. IV France Volume 12, Number 9, November 2002


Page(s)		61 - 64
DOI		https://doi.org/10.1051/jp4:20020355

J. Phys. IV France 12 (2002) Pr9-61
DOI: 10.1051/jp4:20020355

Spin density wave - metal (superconductor) competition: A phase segregation scenario

C. Pasquier, M. Héritier and D. Jérome

Laboratoire de Physique des Solides, bâtiment 510, Centre Universitaire, 91405 Orsay cedex, France

Abstract
We present a model comparing the free energy of a phase exhibiting a segregation between spin density wave (SDW) and metallic domains (eventually superconducting domains) and the free energy of homogeneous phases which explains the findings observed recently in (TMTSF) ₂PF ₆. The dispersion relation of this quasi-one-dimensional organic conductor is linearized around the Fermi level. Deviations from perfect nesting which stabilizes the SDW state are described by a unique parameter t '_b, this parameter can be the pressure as well.