Pressure-induced suppression of the spin-gapped insulator phase in BaVS3: An infrared optical study

I. Kézsmárki, G. Mihály, R. Gaál, N. Barišić, H. Berger, L. Forró, C. C. Homes, and L. Mihály
Phys. Rev. B 71, 193103 – Published 26 May 2005

Abstract

The metal-insulator transition in BaVS3 was studied at ambient pressure and under hydrostatic pressure up to p=26kbar in the energy range of 2.5500meV. The charge gap determined from the optical reflectivity was enhanced, Δch(p)kBTMI(p)12. This ratio is independent of pressure, indicating that the character of the transition did not vary along the pT phase boundary. Above the critical pressure, pcr20kbar, metallic spectra were recorded in the whole temperature range, as expected from the shape of the phase diagram.

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  • Received 15 February 2005

DOI:https://doi.org/10.1103/PhysRevB.71.193103

©2005 American Physical Society

Authors & Affiliations

I. Kézsmárki1, G. Mihály1, R. Gaál2, N. Barišić2, H. Berger2, L. Forró2, C. C. Homes3, and L. Mihály4

  • 1Electron Transport Research Group of the Hungarian Academy of Science and Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary
  • 2Institut de Physique de la matière complexe, EPFL, CH-1015 Lausanne, Switzerland
  • 3Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 4Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794-3800, USA

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Issue

Vol. 71, Iss. 19 — 15 May 2005

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