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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 'BY' version 4.0 license
Abstract

Transport, magnetic and thermal properties at high magnetic fields (H) and low temperatures (T) of the heavy fermion compound CeAuSb2 are 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 TN and a quantum critical point at H c ≅ 5.4 T. Although it exhibits Fermi liquid behavior within the Neel phase, in the paramagnetic state the fluctuations associated with H c give 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 unusual T3-dependence. © 2006 American Institute of Physics.

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