Magnetotransport properties in purple bronze Li0.9Mo6O17 single crystal

H. Chen; J. J. Ying; Y. L. Xie; G. Wu; T. Wu; X. H. Chen

doi:10.1209/0295-5075/89/67010

All issues

Volume 89 / No 6 (March 2010)

EPL, 89 6 (2010) 67010

Abstract

Issue		EPL Volume 89, Number 6, March 2010


Article Number		67010
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/89/67010
Published online		19 April 2010

EPL, 89 (2010) 67010

Magnetotransport properties in purple bronze Li_0.9Mo₆O₁₇ single crystal

H. Chen, J. J. Ying, Y. L. Xie, G. Wu, T. Wu and X. H. Chen

Hefei National Laboratory for Physical Science at Microscale and Department of Physics, University of Science and Technology of China - Hefei, Anhui 230026, PRC

Corresponding author: chenxh@ustc.edu.cn

Received: 8 January 2010
Accepted: 16 March 2010

Abstract

We have measured the resistivity along the a, b and c axes in Li_0.9Mo₆O₁₇ single crystals. The anisotropy ratios $\rho_{c}$ / $\rho _{a}$ and $\rho _{c}$ / $\rho _{b}$ are presented, confirming the quasi–one-dimensionality of the compound. Both the sharp decrease in the anisotropy and the sharp increase in the Hall coefficient R_H below a certain temperature (T_M) indicate potential dimensional crossover. Negative magnetoresistances are observed with magnetic field (H) applied along the b-axis which could be ascribed to the suppression of dimensional crossover. In contrast, large positive magnetoresistance is observed with H applied along the a-axis and the c-axis. While the temperature-dependent resistivity anisotropy indicates dimensional crossover, we find no solid proof for the existence of CDW order by fitting the positive magnetoresistances.

PACS: 71.45.Lr – Charge-density-wave systems / 74.25.F- – Transport properties / 72.20.My – Galvanomagnetic and other magnetotransport effects

© EPLA, 2010

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