A multiple origin for non-linear transport properties in molybdenum blue bronze

B. Zawilski; J. Marcus; T. Klein

doi:10.1209/epl/i2000-00237-5

All issues

Volume 50 / No 1 (April I 2000)

Europhys. Lett., 50 1 (2000) 75-80

Abstract

Issue		Europhys. Lett. Volume 50, Number 1, April I 2000


Page(s)		75 - 80
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2000-00237-5
Published online		01 September 2002

Europhys. Lett., 50 (1), pp. 75-80 (2000)

A multiple origin for non-linear transport properties in $\ab{K_{0.3}MoO_3}$ molybdenum blue bronze

B. Zawilski¹, J. Marcus² and T. Klein²

¹ Clemson University Department of Physics and Astronomy - Clemson, SC 29634 USA and Centre des Recherches sur les Très Basses Températures, CNRS BP 166, 38042 Grenoble Cedex, France
² Laboratoire d'Etudes des Propriétés Electroniques des Solides, CNRS BP 166, 38042 Grenoble Cedex, France

Corresponding author: bzawils@clemson.edu

Received: 6 September 1999
Accepted: 25 January 2000

Abstract

We report on non-linear transport properties in $\ab{K_{0.3}MoO_3}$ molybdenum blue bronze. We show that the conductivity sharply increases above a characteristic threshold field $E_{\ab T}^*$ in three perpendicular crystallographic directions. This threshold field is visible up to room temperature in the direction perpendicular to the ( $\bar201$ ) plane. Data suggests that this singularity is probably not related to the motion of the Charge Density Wave (CDW). Along the CDW axis, the electric field dependence of the conductivity for $E < E_{\ab T}^*$ can be very well described by the scaling theory of the CDW creep in the presence of randomly distributed pinning centers.

PACS: 71.45.Lr – Charge-density-wave systems / 72.15.Nj – Collective modes (e.g., in one-dimensional conductors) / 71.30.+h – Metal-insulator transitions and other electronic transitions

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