2003/11/18 by D. Graf, David Graf, J. S. Brooks +10 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Magnetism in coordination complexes #Molecular Junctions and Nanostructures #Organic and Molecular Conductors Research #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.69.125113
12 pages, 5 figures
arxiv created 2003/11/18 · openalex publication_date 2004/03/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The charge density wave (CDW) transition temperature in the quasi-one-dimensional (Q1D) organic material (Per)2Au(mnt)2 is relatively low (TCDW\ensuremath∼12K). Hence in a mean field BCS model, the CDW state should be completely suppressed in magnetic fields of order 30--40 T. To explore this possibility, the magnetoresistance of (Per)2Au(mnt)2 was investigated in magnetic fields to 45 T for 0.5K<T<12K. For fields directed along the Q1D molecular stacking direction, TCDW decreases with field, terminating at about \ensuremath∼37T for temperatures approaching zero. Results for this field orientation are in general agreement with theoretical predictions, including the field dependence of the magnetoresistance and the energy gap, \ensuremathΔCDW. However, for fields tilted away from the stacking direction, orbital effects arise above 15 T that may be related to the return of un-nested Fermi surface sections that develop as the CDW state is suppressed. These findings are consistent with expectations that Q1D metallic behavior will return outside the CDW phase boundary.