Field-induced metal-insulator transition in a two-dimensional organic superconductor

Abstract

The quasi-two-dimensional organic superconductor beta-(BEDT-TTF)_2SF_5CH_2CF_2SO_3 (T_c approx 4.4 K)shows very strong Shubnikov-de Haas (SdH) oscillations which are superimposed on a highly anomalous steady background magnetoresistance, R_b. Comparison with de Haas- van Alphen oscillations allow a reliable estimate of R_b which is crucial for the correct extraction of the SdH signal. At low temperatures and high magnetic fields insulating behavior evolves. The magnetoresistance data violate Kohler's rule, i.e., cannot be described within the framework of semiclassical transport theory, but converge onto a universal curve appropriate for dynamical scaling at a metal-insulator transition.

arXiv comment4 pages, 4 figures, Phys. Rev. Lett., in press

References in corpus (7)

• Dissipation effects on the superconductor-insulator transition in 2-D superconductors
• Comparison of coherent and weakly incoherent transport models for the interlayer magnetoresistance of layered Fermi liquids
• Incoherent interlayer transport and angular-dependent magnetoresistance oscillations in layered metals
• Violation of Kohler's rule by the magnetoresistance of a quasi-two-dimensional organic metal
• Critical Behavior of the Conductivity of Si:P at the Metal-Insulator Transition under Uniaxial Stress
• Angular Dependent Magnetoresistance Oscillation of a Quasi-Two-Dimensional System in a Periodic Potential
• Thermally fluctuating superconductors in two dimensions

Cited by in corpus (13)

• Charge ordering and antiferromagnetic exchange in layered molecular crystals of the theta type
• Coherent vs incoherent interlayer transport in layered metals
• Metal-insulator transition and charge ordering in the extended Hubbard model at one-quarter filling
• Magnetic Quantum Oscillations of the Longitudinal Conductivity ${\sigma }_{zz}$ in Quasi two-dimensional Metals
• Weakly incoherent magnetotransport in layered metals
• Thermal activation between Landau levels in the organic superconductor ${\beta }^{\prime \prime }$-(BEDT-TTF)${}_2$SF${}_5$CH${}_2$CF${}_2$SO${}_3$
• Crossover from the weak to strong-field behavior of the longitudinal interlayer magnetoresistance in quasi-two-dimensional conductors
• Spin-zero anomaly in the magnetic quantum oscillations of a two-dimensional metal
• Half-filled Hubbard ring with alternating site potentials in a magnetic field
• Shubnikov-de Haas oscillations and electronic correlations in the layered organic metal $\kappa$-(BETS)${}_2$Mn[N(CN)${}_2$]${}_3$
• Giant Quantum Oscillations of the Longitudinal Magnetoresistance in Quasi two-dimensional Metals
• Exponential suppression of interlayer conductivity in very anisotropic quasi-two-dimensional compounds in high magnetic field
• On the de Haas - van Alphen oscillations in quasi-two-dimensional metals: effect of the Fermi surface curvature