Interplay of magnetism, Fermi surface reconstructions, and hidden-order in the heavy-fermion material URu${}_2$Si${}_2$

Abstract

URu${}_2$Si${}_2$ is surely one of the most mysterious of the heavy-fermion compounds. Despite more than twenty years of experimental and theoretical works, the order parameter of the transition at $T_0=17.5$ K is still unknown. The state below $T_0$ remains called "hidden-order phase" and the stakes are still to identify the energy scales driving the system to this phase. We present new magnetoresistivity and magnetization measurements performed on very-high-quality single crystals in pulsed magnetic fields up to 60 T. We show that the transition to the hidden-order state in URu${}_2$Si${}_2$ is initially driven by a high-temperature crossover at around 40-50 K, which is a fingerprint of inter-site electronic correlations. In a magnetic field $\mathbf{H}$ applied along the easy-axis $\mathbf{c}$, the vanishing of this high-temperature scale precedes the polarization of the magnetic moments, as well as it drives the destabilization of the hidden-order phase. Strongly impurity-dependent magnetoresistivity confirms that the Fermi surface is reconstructed below $T_0$ and is strongly modified in a high magnetic field applied along $\mathbf{c}$, i.e. at a sufficiently-high magnetic polarization. The possibility of a sharp crossover in the hidden-order state controlled by a field-induced change of the Fermi surface is pointed out.

10 pages, 6 figures, accepted in Physical Review B

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Cited by in corpus (23)

• Heavy fermions in high magnetic field
• High-field moment polarization in the ferromagnetic superconductor UCoGe
• Field-induced spin-density wave beyond hidden order in URu2Si2
• Lifshitz Transitions in the Ferromagnetic Superconductor UCoGe
• High-Field Fermi Surface Properties in the Low Carrier Heavy Fermion Compound URu2Si2
• Three-dimensional critical phase diagram of the Ising antiferromagnet CeRh${}_2$Si${}_2$ under intense magnetic field and pressure
• Γ3-type Lattice Instability and the Hidden Order of URu2Si2
• Lattice dynamics of the heavy fermion compound URu${}_2$Si${}_2$
• Hybridization-Driven Orthorhombic Lattice Instability in URu2Si2
• High-magnetic field lattice length changes in URu2Si2
• Fermi Surface Reconstruction inside the Hidden Order Phase of URu2Si2 Probed by Thermoelectric Measurements
• Search for Multipolar Instability in URu${}_2$Si${}_2$ Studied by Ultrasonic Measurements under Pulsed Magnetic Field
• Field induced Lifshitz transition in UPt${}_2$Si${}_2$: Fermi surface under extreme conditions
• Fermi surface in the hidden-order state of URu${}_2$Si${}_2$ under intense pulsed magnetic fields up to 81~T
• Fermi-Surface Selective Determination of the $\mathbf{g}$-Factor Anisotropy in URu${}_2$Si${}_2$
• Magnetoelastic coupling in URu2Si2: Probing multipolar correlations in the hidden order state
• Angular Dependence of the High-Magnetic-Field Phase Diagram of URu2Si2
• Ultrasonic Study of the Hidden Order and Heavy-Fermion State in URu${}_2$Si${}_2$ with Hydrostatic Pressure, Rh-doping, and High-Magnetic Fields
• Anisotropic Kondo pseudo-gap in URu2Si2
• URu${}_2$Si${}_2$ under intense magnetic fields: from hidden order to spin-density wave
• The role of band filling in tuning the high field phases of URu2Si2
• Collinear antiferromagnetic order in URu${}_2$Si${}_{2-x}$P${}_x$ revealed by neutron diffraction
• Field-induced phases in a heavy-fermion U(Ru${}_{0.92}$Rh${}_{0.08}$)${}_2$Si${}_2$ single crystal