Skip to main content
eScholarship
Open Access Publications from the University of California

Quantum critical fluctuations in the heavy fermion compound Ce(Ni0.935Pd0.065)2Ge2

  • Author(s): Wang, CH
  • Poudel, L
  • Taylor, AE
  • Lawrence, JM
  • Christianson, AD
  • Chang, S
  • Rodriguez-Rivera, JA
  • Lynn, JW
  • Podlesnyak, AA
  • Ehlers, G
  • Baumbach, RE
  • Bauer, ED
  • Gofryk, K
  • Ronning, F
  • McClellan, KJ
  • Thompson, JD
  • et al.
Abstract

© 2015 IOP Publishing Ltd. Electric resistivity, specific heat, magnetic susceptibility, and inelastic neutron scattering experiments were performed on a single crystal of the heavy fermion compound Ce(Ni0.935Pd0.065)2Ge2in order to study the spin fluctuations near an antiferromagnetic (AF) quantum critical point (QCP). The resistivity and the specific heat coefficient for T ≤ 1K exhibit the power law behavior expected for a 3D itinerant AF QCP (ρ(T) ∼ T3/2and γ(T) ∼ γ0- bT1/2). However, for 2 ≤ T ≤ 10 K, the susceptibility and specific heat vary as logT and the resistivity varies linearly with temperature. Furthermore, despite the fact that the resistivity and specific heat exhibit the non-Fermi liquid behavior expected at a QCP, the correlation length, correlation time, and staggered susceptibility of the spin fluctuations remain finite at low temperature. We suggest that these deviations from the divergent behavior expected for a QCP may result from alloy disorder.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View