Antiferromagnetic criticality at a heavy-fermion quantum phase transition

Abstract

The interpretation of the magnetic phase diagrams of strongly correlated electron systems remains controversial. In particular, the physics of quantum phase transitions, which occur at zero temperature, is still enigmatic. Heavy-fermion compounds aretextbook examples of quantum criticality, as doping, or the application of pressure or a magnetic field can lead to a quantum phase transition between a magnetically ordered state and a paramagnetic regime. A central question concerns the microscopic nature of the critical quantum fluctuations. Are they antiferromagnetic or of local origin? Here we demonstrate, using inelastic neutron scattering experiments, that the quantum phase transition in the heavy-fermion system Ce1-xLaxRu2Si2 is controlled by fluctuations of the antiferromagnetic order parameter. At least for this heavy-fermion family, the Hertz-Millis-Moriya spin fluctuation approach seems to be a sound basis for describing the quantum antiferromagnetic-paramagnetic instability.

15 pages, 4 figures

References in corpus (15)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• Locally critical quantum phase transitions in strongly correlated metals
• Superconducting phases of f-electron compounds
• Onset of antiferromagnetism in heavy fermion metals
• Quantum criticality
• How do Fermi liquids get heavy and die?
• Quantum magnetism and criticality
• Two-dimensional fluctuations at the quantum-critical point of CeCu_{6-x}Au_x
• Phase separation and suppression of critical dynamics at quantum transitions of itinerant magnets: MnSi and (Sr${}_{1-x}$Ca${}_x$)RuO${}_3$
• 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
• A Fermi Sea of Heavy Electrons (a Kondo Lattice) is Never a Fermi Liquid
• Artificial scaling laws of the dynamical magnetic susceptibility in heavy-fermion systems
• Low energy spin fluctuations in the heavy fermion compound Ce${}_{0.925}$La${}_{0.075}$Ru${}_2$Si${}_2$

Cited by in corpus (62)

• Heavy Fermions and Quantum Phase Transitions
• Quantum and classical criticality in a dimerized quantum antiferromagnet
• Quantum Criticality and Global Phase Diagram of Magnetic Heavy Fermions
• Coherent and dissipative dynamics at quantum phase transitions
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Pressure dependence of superconducting critical temperature and upper critical field of 2H-NbS2
• Finite-size scaling at first-order quantum transitions
• Heavy fermions in high magnetic field
• Precise study of the resonance at Q0=(1,0,0) in URu2Si2
• Fermi surface topology of the two-dimensional Kondo lattice model: a dynamical cluster approximation approach
• High-field moment polarization in the ferromagnetic superconductor UCoGe
• Field-induced spin-density wave beyond hidden order in URu2Si2
• Ground-state fidelity at first-order quantum transitions
• High-field metamagnetism in the antiferromagnet CeRh${}_2$Si${}_2$
• Large and Small Fermi-Surface Spin Density Waves in the Kondo Lattice Model
• Orbital-selective Kondo-lattice and enigmatic f-electrons emerging from inside the antiferromagnetic phase of a heavy fermion
• Interplay of magnetism, Fermi surface reconstructions, and hidden-order in the heavy-fermion material URu${}_2$Si${}_2$
• Finite-size scaling at the first-order quantum transitions of quantum Potts chains
• Magnetic Polarization and Fermi Surface Instability: Case of YbRh2Si2
• Fermi Surface Properties, Metamgnetic Transition and Quantum Phase Transition of CeRu${}_2$Si${}_2$ and Its Alloys Probed by the dHvA Effect--Fermi Surface Studies on the Itinerant and Localized Dichotomy of $f$ Electron Nature
• Field-induced quantum fluctuations in the heavy fermion superconductor CeCu2Ge2
• Scaling properties of the dynamics at first-order quantum transitions when boundary conditions favor one of the two phases
• Finite-size scaling at first-order quantum transitions when boundary conditions favor one of the two phases
• Phase diagram, energy scales and nonlocal correlations in the Anderson lattice model
• Quantum phase transition inside the superconducting dome of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by optical magneto-sensing using NV-centers in diamond
• Phase diagram and dynamics of the SU($\mathbf{N}$) symmetric Kondo lattice model
• Three-dimensional critical phase diagram of the Ising antiferromagnet CeRh${}_2$Si${}_2$ under intense magnetic field and pressure
• Thermoelectric response near a quantum critical point of beta-YbAlB4 and YbRh2Si2: A comparative study
• Field-Temperature Phase Diagram and Entropy Landscape of CeAuSb${}_2$
• Fragile antiferromagnetism in the heavy-fermion compound YbBiPt
• Ultra-High Resolution Neutron Spectroscopy of Low-Energy Spin Dynamics in UGe${}_2$
• Dissipative dynamics at first-order quantum transitions
• From Ising resonant fluctuations to static uniaxial order in antiferromagnetic and weakly superconducting CeCo(In${}_{1-x}$Hg${}_x$)${}_5$ ($x$=0.01)
• The dual nature of magnetism in a uranium heavy fermion system
• Convergence of the enhancement of the effective mass under pressure and magnetic field in heavy-fermion compounds: CeRu2Si2, CeRh2Si2, and CeIn3
• The magnetic ground state of two isostructual polymeric quantum magnets, [Cu(HF${}_2$)(pyrazine)${}_2$]SbF${}_6$ and [Co(HF${}_2$)(pyrazine)${}_2$]SbF${}_6$, investigated with neutron powder diffraction
• Complex magneto-elastic properties in the frustrated kagome-staircase compounds (Co${}_{1-x}$Ni${}_x$)${}_3$V${}_2$O${}_8$
• Quantum criticality and Lifshitz transition in the Ising system CeRu2Si2: Comparison with YbRh2Si2
• Existence of Anisotropic Spin Fluctuations at Low Temperature in the Normal Phase of the Superconducting Ferromagnet UCoGe
• Unusual Coupling Between Field-induced Spin Fluctuations and Spin Density Wave in Intermetallic CeAg2Ge2
• Break up of heavy fermions at an antiferromagnetic instability
• Incommensurate antiferromagnetism in UTe2 under pressure
• A Local Quantum Phase Transition in YFe${}_2$Al${}_{10}$
• Structural and Magnetic Phase Transitions in CeCu${}_{6-x}{T}_x$ ($T$ = Ag, Pd)
• Scaling phenomena driven by inhomogeneous conditions at first-order quantum transitions
• Out-of-equilibrium dynamics across the first-order quantum transitions of one-dimensional quantum Ising models
• Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice
• Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice
• Interplay between charge, magnetic and superconducting order in a Kondo lattice with an attractive Hubbard interaction
• Magnetic Field Driven Electronic Singularities through Metamagnetic Phenomena: Case of the Heavy Fermion Antiferromagnet Ce(Ru0.92Rh0.08)2Si2
• Temperature dependent tunneling spectroscopy in the heavy fermion CeRu2Si2 and in the antiferromagnet CeRh2Si2
• Quantum Simulation of Quantum Phase Transitions Using the Convex Geometry of Reduced Density Matrices
• Quantum criticality of Ce${}_{1-x}$La${}_x$Ru${}_2$Si${}_2$ : the magnetically ordered phase
• Ferromagnetic and metamagnetic transitions in itinerant electron systems: a microscopic study
• Missing spectral weight in a heavy-fermion system far above Néel temperature
• Interplay of spin gap and nanoscopic quantum fluctuations in intermetallic CeCu2Ge2
• Quantum Critical Fluctuations in the Heavy fermion compound Ce(Ni${}_{0.935}$Pd${}_{0.065}$)${}_2$Ge${}_2$
• High-field moment polarization in the itinerant ferromagnet URhSi
• Taking a step back and looking at the superconducting dome from a distance
• Boosted magnetic fluctuations at the onset of superconductivity in UTe${}_2$ beyond 40 T
• Magnetic Field Dependence of the Spin Fluctuations in CeCu${}_{5.8}$Ag${}_{0.2}$
• Magnetic transition and spin fluctuations in the unconventional antiferromagnetic compound Yb3Pt4