NonFermiLiquid Crossovers in a QuasiOneDimensional Conductor in a Tilted Magnetic Field
Abstract
We consider a theoretical problem of electronelectron scattering time in a quasionedimensional (Q1D) conductor in a magnetic field, perpendicular to its conducting axis. We show that inverse electronelectron scattering time becomes of the order of characteristic electron energy, 1 /τ ∼ɛ ∼T , in a high magnetic field, directed far from the main crystallographic axes, which indicates breakdown of the Fermiliquid theory. In a magnetic field, directed close to one of the main crystallographic axis, inverse electronelectron scattering time becomes much smaller than characteristic electron energy and, thus, applicability of Fermiliquid theory restores. We suggest that there exist crossovers (or phase transitions) between Fermiliquid and some nonFermiliquid states in a strong enough tilted magnetic field. Application of our results to the Q1D conductor (Per)_{2}Au (mnt)_{2} shows that it has to be possible to observe the abovementioned phenomenon in feasibly high magnetic fields of the order of H ≥H^{*}≃25 T .
 Publication:

Physical Review Letters
 Pub Date:
 October 2015
 DOI:
 10.1103/PhysRevLett.115.157001
 arXiv:
 arXiv:1511.01888
 Bibcode:
 2015PhRvL.115o7001L
 Keywords:

 74.70.Kn;
 71.10.Ay;
 71.10.Hf;
 75.20.En;
 Organic superconductors;
 Fermiliquid theory and other phenomenological models;
 NonFermiliquid ground states electron phase diagrams and phase transitions in model systems;
 Metals and alloys;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 5 pages, 2 figures