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Scientific article
English

Pressure-induced structural transitions triggering dimensional crossover in the lithium purple bronze Li0.9Mo6O17

Published inPhysical Review. B, Condensed Matter, vol. 103, no. 23
Publication date2021
Abstract

At ambient pressure, lithium molybdenum purple bronze (Li0.9Mo6O17) is a quasi-one dimensionalsolid in which the anisotropic crystal structure and the linear dispersion of the underlying bandsproduced by electronic correlations possibly bring about a rare experimental realization of Tomomaga-Luttinger liquid physics. It is also the sole member of the broader purple molybdenum bronzes familywhere a Peierls instability has not been identified at low temperatures. The present study reports apressure-induced series of phase transitions between 0 and 12 GPa. These transitions are stronglyreflected in infrared spectroscopy, Raman spectroscopy, and x-ray diffraction. The most dramaticeffect seen in optical conductivity is the metalization of thec-axis, concomitant to the decrease ofconductivity along theb-axis. This indicates that high pressure drives the material away from itsquasi-one dimensional behavior at ambient pressure. While the first pressure-induced structure ofthe series is resolved, the identification of the underlying mechanisms driving the dimensional changein the physics remains a challenge.

Funding
  • Swiss National Science Foundation - 179157
Citation (ISO format)
TRAN, Michaël et al. Pressure-induced structural transitions triggering dimensional crossover in the lithium purple bronze Li<sub>0.9</sub>Mo<sub>6</sub>O<sub>17</sub>. In: Physical Review. B, Condensed Matter, 2021, vol. 103, n° 23. doi: 10.1103/PhysRevB.103.235124
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Article (Submitted version)
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Identifiers
ISSN of the journal1098-0121
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Creation07/02/2021 6:17:00 PM
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