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Observation of the magnetic field dependence of the cyclotron mass in the Kondo lattice CeB6.

  • Author(s): Joss, W;
  • van Ruitenbeek JM;
  • Crabtree, GW;
  • Tholence, JL;
  • van Deursen AP;
  • Fisk, Z
  • et al.
Abstract

Low-temperature, high-field deHaas van Alphen measurements are presented which show that the conduction-electron mass in the Kondo lattice CeB6 decreases strongly with field. This field dependence is consistent with recent specific-heat results. The geometry of the Fermi surface does not depend on field. Thus we observe a reduction in the many-body enhancement of the electronic density of states at the Fermi energy which is described by a change of the itinerant-electron mass alone; the number of particles and the occupation of states in k space remain unchanged. We argue that CeB6 represents a different limit of heavy-fermion behavior as compared to UPt3. © 1987 The American Physical Society.

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