Phys. Rev. Lett. 85, 1938–1941 (2000)Pressure Induced Quantum Critical Point and Non-Fermi-Liquid Behavior in BaVS3Received 24 January 2000; published in the issue dated 28 August 2000 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 pcr = 20kbar. We find two kinds of anomalous conducting states. The high-pressure metallic phase is a non-Fermi liquid described by Δρ∝Tn where n = 1.2–1.3 at 1<T<40K. At p<pcr, the transition is preceded by a wide precursor region with critically increasing resistivity which we ascribe to the opening of a soft Coulomb gap. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.1938
DOI:
10.1103/PhysRevLett.85.1938
PACS:
71.10.Hf, 71.27.+a, 71.30.+h, 72.80.Ga
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