Magnetic field induced coherence-incoherence crossover in the interlayer conductivity of a layered organic metal

M. V. Kartsovnik, P. D. Grigoriev, W. Biberacher, and N. D. Kushch
Phys. Rev. B 79, 165120 – Published 28 April 2009

Abstract

The angle-dependent interlayer magnetoresistance of the pressurized (to the normal metallic state) layered organic metal α(BEDT-TTF)2KHg(SCN)4 is found to change from the conventional behavior at low magnetic fields to an anomalous one at high fields. The dependence of this field-induced crossover on the sample purity and temperature reveals parallel contribution of the classical Boltzmann and incoherent channels in the interlayer conductivity. The latter channel, having a metallic temperature dependence but being insensitive to an in-plane magnetic field, may be responsible for magnetoresistance anomalies observed in a number of layered metals. We propose a possible mechanism for the incoherent channel combining interlayer tunneling via local hopping centers and intralayer diffusion.

  • Figure
  • Figure
  • Figure
  • Received 1 April 2009

DOI:https://doi.org/10.1103/PhysRevB.79.165120

©2009 American Physical Society

Authors & Affiliations

M. V. Kartsovnik1, P. D. Grigoriev2, W. Biberacher1, and N. D. Kushch3

  • 1Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany
  • 2L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
  • 3Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 79, Iss. 16 — 15 April 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×