Eur. Phys. J. B 58, 25-30 (2007)
https://doi.org/10.1140/epjb/e2007-00202-8

Angular studies of the magnetoresistance in the density wave state of the quasi-two-dimensional purple bronze KMo₆O₁₇

¹ Institut Néel, CNRS/UJF- BP 166, 38042 Grenoble Cedex 9, France
² Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, 85748 Garching, Germany
³ Institut National Polytechnique de Grenoble, BP257, ENSPG, 38016 Grenoble Cedex 1, France
⁴ Grenoble High Magnetic Field Laboratory, BP 166, GHMFL, 38042 Grenoble Cedex 9, France
⁵ Laboratoire National des Champs Magnétiques Pulsés, LNCMP 143 Avenue de Rangueil, 31077 Toulouse, France

Corresponding author: ^a claire.schlenker@grenoble.cnrs.fr

Received: 14 March 2007
Revised: 8 June 2007
Published online: 28 July 2007

Abstract

The purple molybdenum bronze KMo₆O₁₇ is a quasi-two-dimensional compound which shows a Peierls transition towards a commensurate metallic charge density wave (CDW) state. High magnetic field measurements have revealed several transitions at low temperature and have provided an unusual phase diagram “temperature-magnetic field”. Angular studies of the interlayer magnetoresistance are now reported. The results suggest that the orbital coupling of the magnetic field to the CDW is the most likely mechanism for the field induced transitions. The angular dependence of the magnetoresistance is discussed on the basis of a warped quasi-cylindrical Fermi surface and provides information on the geometry of the Fermi surface in the low temperature density wave state.