Soliton Wall Superlattice Phase in Organic Conductor (Per)$_{2}$Pt(mnt)$_{2}$ in a Magnetic Field

We suggest a model [1] to explain the appearance of a high resistance high magnetic field charge-density-wave (CDW) phase, discovered in quasi-one-dimensional (Q1D) organic conductor (Per)$_{2}$Pt(mnt)$_{2}$. In particular, we show that the Pauli spin-splitting effects improve the nesting properties of a realistic Q1D electron spectrum, and, therefore, a high resistance Peierls CDW phase is stabilized in high magnetic fields. In intermediate and very high magnetic fields, a periodic soliton wall superlattice (SWS) phase is found to be a ground state. We suggest to study the predicted phase transitions between the Peierls and SWS CDW phases to discover a unique SWS state. [1] A.G. Lebed and Si Wu, Physical Review Letters, submitted (2006).