Magnetic Field Induced Coherence-Incoherence Crossover in the Interlayer Conductivity of a Layered Organic Metal

Abstract

The angle-dependent interlayer magnetoresistance of the layered organic metal $\alpha$-(BEDT-TTF)${}_2$KHg(SCN)${}_4$ is found to undergo a dramatic change from the classical conventional behavior at low magnetic fields to an anomalous one at high fields. This field-induced crossover and its dependence on the sample purity and temperature imply the existence of two parallel channels in the interlayer transport: a classical Boltzmann conductivity ${\sigma }_c$ and an incoherent channel ${\sigma }_i$. We propose a simple model for ${\sigma }_i$ explaining its metallic temperature dependence and low sensitivity to the inplane field component.

5 pages

References in corpus (7)

• The effect of irradiation-induced disorder on the conductivity and critical temperature of the organic superconductor $\kappa$-(BEDT-TTF)${}_2$Cu(SCN)${}_2$
• Angle-dependent magnetoresistance in the weakly incoherent interlayer transport regime
• Anomalous c-axis transport in layered metals
• Indications of coherence-incoherence crossover in layered transport
• c-axis transport in highly anisotropic metals: role of small polarons
• Boson-assisted tunneling in layered metals
• Dimensional crossover and anomalous magnetoresistivity in single crystals $N{a}_{x}Co{O}_2$

Cited by in corpus (18)

• Fermi Surface of the Electron-doped Cuprate Superconductor Nd_{2-x}Ce_xCuO_{4} Probed by High-Field Magnetotransport
• Effective Coulomb interactions within BEDT-TTF dimers
• Magnetic-field-induced dimensional crossover in the organic metal $\alpha$-(BEDT-TTF)${}_2$KHg(SCN)${}_4$
• Weakly incoherent magnetotransport in layered metals
• Longitudinal interlayer magnetoresistance in quasi-2D metals
• Angular dependence of magnetoresistance in strongly anisotropic quasi-two-dimensional metals for various Landau-level shapes
• Conductivity of anisotropic inhomogeneous superconductors above critical temperature
• Bilayer splitting versus Fermi-surface warping as an origin of slow oscillations of in-plane magnetoresistance in rare-earth tritellurides
• Crossover from the weak to strong-field behavior of the longitudinal interlayer magnetoresistance in quasi-two-dimensional conductors
• Monotonic growth of interlayer magnetoresistance in strong magnetic field in very anisotropic layered metals
• Transport enhancement from incoherent coupling between one-dimensional quantum conductors
• False spin zeros in the angular dependence of magnetic quantum oscillation in quasi-two-dimensional metals
• Magnetic quantum oscillations in the charge-density-wave state of the organic metals $\alpha$-(BEDT-TTF)${}_2$MHg(SCN)${}_4$ with M = K and Tl
• Fermi surface properties of the bifunctional organic metal $\kappa$-(BETS)${}_2$Mn[N(CN)${}_2$]${}_3$ near the metal--insulator transition
• Exponential suppression of interlayer conductivity in very anisotropic quasi-two-dimensional compounds in high magnetic field
• Slow in-plane magnetoresistance oscillations in multiband quasi-two-dimensional metals
• Resistive properties and phase diagram of the organic antiferromagnetic metal $\kappa$-(BETS)${}_2$FeCl${}_4$
• In-plane and interlayer magnetoresistance in FeSe