Anisotropies in the magnetotransport properties of quasi-two-dimensional η-Mo4O11 crystals

Minoru Sasaki, Naoki Miyajima, Hiroshi Negishi, Wen Xiu Gao, Masasi Inoue, Hideoki Kadomatsu, Gordon Machel, Hiroyuki Nojiri, Mitsuhiro Motokawa

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10 Citations (Scopus)


Magnetotransport measurements have been made for quasi-two-dimensional η-Mo4O11 crystals in its charge-density-wave (CDW) phases along the crystallographic a*-, b-, and c-axes at low temperatures 0.3-4.2K in magnetic fields up to 11T. The diagonal components ρxx (or b-axis), ρyy (c-axis), and ρzz (a*-axis) of the resistivity tensor are highly anisotropic (ρxx < ρyy ≪ ρzz; ρzzxx ∼ 102). Computer simulations for the magnetic field dependence of ρxx, ρyy, and ρxy are made using a multicarrier model, in good agreement with the observations. From the in-plane anisotropy, we have estimated the anisotropic shape of the Fermi surfaces. These anisotropic properties are discussed by considering the characteristic crystal structure and conduction process via conducting and insulating layers along the z-axis. Furthermore, in view of the existing band model of this material and the data analyses, the observed quantum oscillations are not simply due to Shubnikov de-Haas oscillations but to some magnetic-field induced phase transition, as found for low-dimensional organic Bechgaard salts, the essence of which is the presence of hidden quasi-one-dimensional Fermi surface.

Original languageEnglish
Pages (from-to)539-547
Number of pages9
JournalJournal of the Physical Society of Japan
Issue number2
Publication statusPublished - 1999 Feb


  • Anisotropy
  • Charge-density-wave
  • Conduction mechanism
  • Magnetotransport
  • Quasi-two-dimensional matter
  • η-MoO


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