Magnetic field induced ordering in quasi-one-dimensional quantum magnets

Magnetic Field Induced Ordering in Quasi-One-Dimensional Quantum Magnets

Three-dimensional magnetic ordering transitions are studied theoretically in strongly anisotropic quantum magnets. An external magnetic field can drive quasi-one-dimensional subsystems with a spin gap into a gapless regime, thus inducing long-range three-dimensional magnetic ordering due to weak residual magnetic coupling between the subsystems. Compounds with higher spin degrees of freedom, su...

Superconductivity of Quasi-One-Dimensional Electrons in Strong Magnetic Field

The superconductivity of quasi-one-dimensional electrons in the magnetic field is studied. The system is described as the one-dimensional electrons with no frustration due to the magnetic field. The interaction is assumed to be attractive between electrons in the nearest chains, which corresponds to the lines of nodes of the energy gap in the absence of the magnetic field. The effective interac...

Magnetic Ordering in Layered Magnets

Quasi-one-dimensional superconductors: from weak to strong magnetic field

We discuss the possible existence of a superconducting phase at high magnetic field in organic quasione-dimensional conductors. We consider in particular (i) the formation of a Larkin-OvchinnikovFulde-Ferrell state, (ii) the role of a temperature-induced dimensional crossover occuring when the transverse coherence length ξz(T ) becomes of the order of the lattice spacing, and (iii) the effect o...

High magnetic field induced charge density wave state in a quasi-one-dimensional organic conductor.

The quasi-one-dimensional organic conductor (Per)2Pt(mnt)2 exhibits a charge density wave ground state below 8 K. Magnetoresistance and magnetization measurements show that the charge density wave is suppressed with magnetic fields of order 20 T, above which a high resistance state, with a cascade of subphases, appears. This new state, tentatively identified as a field induced charge density wa...