2021/05/28 by M. K. Tran, Michaël Tran, Ana Akrap +12
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Ambient pressure #Anisotropy #Chemistry #Condensed matter physics #Crystallography #Diamond anvil cell #High pressure #Inorganic Fluorides and Related Compounds #Lithium (medication) #Materials science #Optics #Organic and Molecular Conductors Research #Physics #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.103.235124
published as Phys. Rev. B 103, 235124 (2021) · 10 pages, 12 figures
arxiv created 2021/05/28 · openalex publication_date 2021/06/14 · arxiv updated 2021/06/15 · openalex created_date 2021/06/22 · openalex updated_date 2026/08/06
At ambient pressure, lithium molybdenum purple bronze (Li0.9Mo6O17) 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.