2000/01/28 by L. Forro, L. Forró, R. Gaal +10
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paper · pdf · doi:10.1103/physrevlett.85.1938
published as Phys. Rev. Lett. 85, 1938 (2000) · 4 pages, 5 eps figures, problem with figure corrected
arxiv created 2000/01/28 · openalex publication_date 2004/01/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/04/28
The phase diagram of BaVS3 is studied under pressure using resistivity measurements. The temperature of the metal to nonmagnetic Mott insulator transition decreases under pressure, and vanishes at the quantum critical point p(cr) = 20 kbar. We find two kinds of anomalous conducting states. The high-pressure metallic phase is a non-Fermi liquid described by Deltarho approximately T(n) where n = 1.2-1.3 at 1<T<40 K. At p<p(cr), the transition is preceded by a wide precursor region with critically increasing resistivity which we ascribe to the opening of a soft Coulomb gap.