Abstract
The angle-dependent interlayer magnetoresistance of the pressurized (to the normal metallic state) layered organic metal 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.
- Received 1 April 2009
DOI:https://doi.org/10.1103/PhysRevB.79.165120
©2009 American Physical Society