Quantum Critical Scaling and origin of Non-Fermi-Liquid behavior in Sc${}_{1-x}$U${}_x$Pd${}_3$

Abstract

We use inelastic neutron scattering to study magnetic excitations of Sc${}_{1-x}$U${}_x$Pd${}_3$ for U concentrations ($x=0.25$, 0.35) near the spin glass quantum critical point (QCP). The excitations are spatially incoherent, broad in energy ($E=\hslash \omega$), and follow $\omega /T$ scaling at all wave vectors investigated. Since similar $\omega /T$ scaling has been observed for UCu${}_{5-x}$Pd${}_x$ and CeCu${}_{6-x}$Au${}_x$ near the antiferromagnetic (AF) QCP, we argue that the observed non Fermi liquid (NFL) behavior in these $f$-electron materials arises from the critical phenomena near a T=0 K phase transition, irrespective of the nature of the transition.

arXiv commentSubmitted to PRL

References in corpus (12)

• Locally critical quantum phase transitions in strongly correlated metals
• Quantum Fluctuations of a Nearly Critical Heisenberg Spin Glass
• Disorder-driven non-Fermi liquid behavior in Kondo alloys
• Scaling of magnetic fluctuations near a quantum phase transition
• Non-Fermi Liquid Behavior in U and Ce Alloys: Criticality, Disorder, Dissipation, and Griffiths-McCoy singularities
• Non Fermi Liquid Behaviour near a $T=0$ spin-glass transition
• Local fluctuations in quantum critical metals
• Quantum field theory of metallic spin glasses
• Glassy Spin Dynamics in Non-Fermi-Liquid UCu_{5-x}Pd_x, x = 1.0 and 1.5
• Non-Fermi Liquid Behavior in a Disordered Kondo Alloy Model
• Effects of lattice disorder in the UCu_(5-x)Pd_(x) system
• Non-Fermi-Liquid Scaling in Ce(Ru_{0.5}Rh_{0.5})_2Si_2

Cited by in corpus (11)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Global Magnetic Phase Diagram and Local Quantum Criticality in Heavy Fermion Metals
• Dynamic Scaling in the Susceptibility of the Spin-1\2 Kagome Lattice Antiferromagnet Herbertsmithite
• Evolution of the low energy spin dynamics in electron-doped high-transition temperature superconductor Pr0.88LaCe0.12CuO4-d
• Dynamical correlations and quantum phase transition in the quantum Potts model
• Magnetic Quantum Phase Transitions in Kondo Lattices
• Quantum critical spin-liquid-like behavior in S = 1/2 quasikagome lattice CeRh1-xPdxSn investigated using muon spin relaxation and neutron scattering
• Unusual Coupling Between Field-induced Spin Fluctuations and Spin Density Wave in Intermetallic CeAg2Ge2
• Zero-Field Ambient-Pressure Quantum Criticality in the Stoichiometric Non-Fermi Liquid System CeRhBi
• Further analysis of the quantum critical point of Ce${}_{1-x}$La${}_x$Ru${}_2$Si${}_2$
• Inelastic neutron scattering studies of Crystal Field Levels in PrOs${}_4$As${}_{12}$