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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

https://doi.org/10.1063/1.2354899Creative Commons Attribution 4.0 International Public License
Abstract

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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