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Open Access Publications from the University of California

Magnetic field-induced quantum critical point in CeAuSb2

  • Author(s): Balicas, L
  • Nakatsuji, S
  • Lee, H
  • Schlottmann, P
  • Murphy, TP
  • Fisk, Z
  • et al.

Published Web Location Commons Attribution 4.0 International Public License

Transport, magnetic and thermal properties at high magnetic fields (H) and low temperatures (T) of the heavy fermion compound CeAuSb2are reported. At H=0 this layered system exhibits antiferromagnetic order below TN= 6K. Applying B along the inter-plane direction, leads to a continuous suppression of TNand a quantum critical point at Hc≅ 5.4 T. Although it exhibits Fermi liquid behavior within the Neel phase, in the paramagnetic state the fluctuations associated with Hcgive rise to unconventional behavior in the resistivity (sub-linear in T) and to a TlnT dependence in the magnetic contribution to the specific heat. For H > Hc, and low T the electrical resistivity exhibits an unusualT3-dependence. © 2006 American Institute of Physics.

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