Dimensional crossover in the purple bronze Li0.9Mo6O17.

Magnetism in purple bronze Li0.9Mo6O17

Probing localization effects in Li0.9Mo6O17 purple bronze: An optical-properties investigation

We report the polarized reflectance and optical conductivity of the quasi-one-dimensional conductor Li0.9Mo6O17 as a function of temperature. The compound displays an unusual ~non-Drude-type! mobile carrier response at low-energy, with partially screened vibrational features along the highly conducting b axis. In addition, we observe Mo d→d transitions near 0.42, 0.57, and 1.3 eV, and an O p→Mo...

Direct observation of charge state in the quasi-one-dimensional conductor Li0.9Mo6O17

The quasi-one-dimensional conductor Li0.9Mo6O17 has been of great interest because of its unusual properties. It has a conducting phase with properties different from a simple Fermi liquid, a poorly understood "insulating" phase as indicated by a metal-"insulator" crossover (a mystery for over 30 years), and a superconducting phase which may involve spin triplet Cooper pairs as a three-dimensio...

2 2 M ar 2 01 3 Photoemission Spectroscopy and the Unusually Robust One Dimensional Physics of Lithium Purple

Temperature dependent photoemission spectroscopy in Li0.9Mo6O17 contributes to evidence for one dimensional physics that is unusually robust. Three generic characteristics of the Luttinger liquid are observed, power law behavior of the k-integrated spectral function down to temperatures just above the superconducting transition, k-resolved lineshapes that show holon and spinon features, and qua...

Directional field-induced metallization of quasi-one-dimensional Li0.9Mo6O17.

We report a detailed magnetotransport study of the highly anisotropic quasi-one-dimensional oxide Li(0.9)Mo(6)O(17) whose in-chain electrical resistivity diverges below a temperature T_{min} approximately 25 K. For T < T_{min}, a magnetic field applied parallel to the conducting chain induces a large negative magnetoresistance and, ultimately, the recovery of a metallic state. We show evidence ...