Quantum Critical Point of Itinerant Antiferromagnet in Heavy Fermion

Abstract

A quantum critical point (QCP) of the heavy fermion Ce(Ru_{1-x}Rh_x)_2Si_2 (x = 0, 0.03) has been studied by single-crystalline neutron scattering. By accurately measuring the dynamical susceptibility at the antiferromagnetic wave vector k_3 = 0.35 c^*, we have shown that the energy width Gamma(k_3), i.e., inverse correlation time, depends on temperature as Gamma(k_3) = c_1 + c_2 T^{3/2 +- 0.1}, where c_1 and c_2 are x dependent constants, in a low temperature range. This critical exponent 3/2 +- 0.1 proves that the QCP is controlled by that of the itinerant antiferromagnet.

4 pages, 3 figures

References in corpus (3)

• Anomalous scaling behavior of the dynamical spin susceptibility of Ce${}_{0.925}$La${}_{0.075}$Ru${}_2$Si${}_2$
• Spin Fluctuation in Heavy Fermion CeRu_2Si_2
• Spin Fluctuations and Non-Fermi-Liquid Behavior of CeNi_2Ge_2

Cited by in corpus (10)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• 4f-derived Fermi Surfaces of CeRu2(Si[1-x]Ge[x])2 near the Quantum Critical Point: Resonant Soft X-ray ARPES Study
• Existence of Heavy Fermions in the Antiferromagnetic Phase of CeIn3
• Two-dimensional heavy fermions on the strongly correlated boundaries of Kondo topological insulators
• Lifshitz Transition and Metamagnetism: Thermoelectric Studies of CeRu${}_2$Si${}_2$
• Quantum Phase Transition in the Itinerant Antiferromagnet (V0.9Ti0.1)2O3
• Evidence for magnetic clusters in stoichiometric quantum critical CeRu${}_2$Si${}_2$
• Quantum Critical Fluctuations in the Heavy fermion compound Ce(Ni${}_{0.935}$Pd${}_{0.065}$)${}_2$Ge${}_2$
• A Quantitative Solution to the Kondo Lattice Problem