Pressure-induced structural transitions triggering dimensional crossover in the lithium purple bronze Li0.9Mo6O17
| Autor: | D. van der Marel, Céline Besnard, Ana Akrap, Martha Greenblatt, J. W. Allen, Pascal Schouwink, Jérémie Teyssier, Julien Levallois, M. K. Tran, Ph. Lerch |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Phase transition
Materials science Condensed matter physics chemistry.chemical_element Infrared spectroscopy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Optical conductivity chemistry.chemical_compound symbols.namesake chemistry Lithium molybdenum purple bronze Molybdenum 0103 physical sciences symbols Lithium 010306 general physics 0210 nano-technology Raman spectroscopy Ambient pressure |
| Zdroj: | Physical Review B. 103 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | At ambient pressure, lithium molybdenum purple bronze (${\mathrm{Li}}_{0.9}{\mathrm{Mo}}_{6}{\mathrm{O}}_{17}$) is a quasi-one-dimensional solid in which the anisotropic crystal structure and the linear dispersion of the underlying bands produced 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 family where a Peierls instability has not been identified at low temperatures. The present paper reports a pressure-induced series of phase transitions between 0 and 12 GPa. These transitions are strongly reflected in infrared spectroscopy, Raman spectroscopy, and x-ray diffraction. The most dramatic effect seen in optical conductivity is the metalization of the $c$ axis, concomitant to the decrease in conductivity along the $b$ axis. This indicates that high pressure drives the material away from its quasi-one-dimensional behavior at ambient pressure. Although the first pressure-induced structure of the series is resolved, the identification of the underlying mechanisms driving the dimensional change in the physics remains a challenge. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|