Magnetotransport properties in purple bronze Li$_{0.9}$Mo$_6$O$_{17}$ Single Crystal

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

doi:10.1088/0953-8984/21/1/016004

paper

Magnetotransport properties in purple bronze Li $_{0.9}$ Mo $_{6}$ O $_{17}$ Single Crystal

arXiv:0906.3855 · doi:10.1088/0953-8984/21/1/016004

Abstract

We have measured resistivity along the a, b and c axes of Li $_{0.9}$ Mo $_{6}$ O $_{17}$ single crystal. The anisotropy $ρ$ $_{c}$ / $ρ$ $_{a}$ and $ρ$ $_{c}$ / $ρ$ $_{b}$ is given, confirming the quasi-one-dimensionality of the compound. The sharp decrease in the anisotropy below a certain temperature (T $_{M}$ ) indicates dimensional crossover. Superconductivity occurs at 1.8 K well below $T_{M}$ . Negative MRs are observed with magnetic field (H) applied along b axis. This could be ascribed to suppression of energy gap associated with CDW state. While large positive MR is observed with H $∥$ c-axis. The MR data can be well fitted by a modified two-band model which has been used in CDW compounds such as quasi-two-dimensional purple bronzes A $_{0.9}$ Mo $_{6}$ O $_{17}$ (A = K, Na, Tl) and quasi-one-dimensional conductor NbSe $_{3}$ . The behavior of MR provides a strong evidence for the existence of CDW instability in $L i_{0.9} M o_{6} O_{17}$ .

6 pages, 5 figures

Magnetotransport properties in purple bronze Li0.9​Mo6​O17​ Single Crystal

Abstract

References in corpus (8)

Magnetotransport properties in purple bronze Li $_{0.9}$ Mo $_{6}$ O $_{17}$ Single Crystal