Electronic structure of a quasi-one-dimensional insulator: The molybdenum red bronze K0.33MoO3

S. Mitrovic, L. Perfetti, C. Søndergaard, G. Margaritondo, M. Grioni, N. Barišić, L. Forró, and L. Degiorgi
Phys. Rev. B 69, 035102 – Published 13 January 2004
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Abstract

High-resolution angle-resolved photoemission (ARPES) displays quasi-one dimensional (1D) electronic states in the insulating molybdenum red bronze K0.33MoO3, in good qualitative agreement with band structure calculations. Combined ARPES, optical conductivity, and electrical resistivity data underline the importance of defects which pin the Fermi level within the gap. The ARPES line shape exhibits the same strong-coupling features observed in the blue bronze K0.3MoO3, a related 1D Peierls conductor. We speculate that a similar mechanism could be at the origin of the gaps in both materials.

  • Received 22 May 2003

DOI:https://doi.org/10.1103/PhysRevB.69.035102

©2004 American Physical Society

Authors & Affiliations

S. Mitrovic, L. Perfetti, C. Søndergaard, G. Margaritondo, and M. Grioni

  • Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

N. Barišić and L. Forró

  • Institut de Physique de la Matière Complexe, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

L. Degiorgi

  • PSI, CH-5232 Villigen, Switzerland
  • Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich, Switzerland

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Vol. 69, Iss. 3 — 15 January 2004

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