Fermi surface in the hidden-order state of URu${}_2$Si${}_2$ under intense pulsed magnetic fields up to 81~T

Abstract

We present measurements of the resistivity ${\rho }_{x,x}$ of URu2Si2 high-quality single crystals in pulsed high magnetic fields up to 81~T at a temperature of 1.4~K and up to 60~T at temperatures down to 100~mK. For a field \textbf{H} applied along the magnetic easy-axis \textbf{c}, a strong sample-dependence of the low-temperature resistivity in the hidden-order phase is attributed to a high carrier mobility. The interplay between the magnetic and orbital properties is emphasized by the angle-dependence of the phase diagram, where magnetic transition fields and crossover fields related to the Fermi surface properties follow a 1/$\cos \theta$-law, $\theta$ being the angle between \textbf{H} and \textbf{c}. For $\mathbf{H}\parallel \mathbf{c}$, a crossover defined at a kink of ${\rho }_{x,x}$, as initially reported in [Shishido et al., Phys. Rev. Lett. \textbf{102}, 156403 (2009)], is found to be strongly sample-dependent: its characteristic field ${\mu }_0{H}^{\ast }$ varies from $\simeq 20$~T in our best sample with a residual resistivity ratio RRR of $225$ to $\simeq 25$~T in a sample with a RRR of $90$. A second crossover is defined at the maximum of ${\rho }_{x,x}$ at the sample-independent characteristic field ${\mu }_0{H}_{\rho ,max}^{LT}\simeq 30$~T. Fourier analyzes of SdH oscillations show that $H_{\rho ,max}^{LT}$ coincides with a sudden modification of the Fermi surface, while $H^{\ast }$ lies in a regime where the Fermi surface is smoothly modified. For $\mathbf{H}\parallel \mathbf{a}$, i) no phase transition is observed at low temperature and the system remains in the hidden-order phase up to 81~T, ii) quantum oscillations surviving up to 7~K are related to a new and almost-spherical orbit - for the first time observed here - at the frequency $F_{\lambda }\simeq 1400$~T and associated with a low effective mass $m_{\lambda }^{\ast }=(1\pm 0.5)\cdot m_0$, and iii) no Fermi surface modification occurs up to 81~T.

11 pages, 8 figures

References in corpus (13)

• Exotic Superconducting Properties in the Electron-Hole Compensated Heavy Fermion `Semimetal' URu2Si2
• Emergent Rank-5 'Nematic' Order in URu2Si2
• Fermi surface instability at the hidden-order transition of URu2Si2
• Heavy fermions in high magnetic field
• Cyclotron Resonance in the Hidden-Order Phase of URu2Si2
• Possible Phase Transition Deep Inside the Hidden Order Phase of Ultraclean URu2Si2
• On the destruction of the hidden order in URu${}_2$Si${}_2$ by a strong magnetic field
• High-Field Fermi Surface Properties in the Low Carrier Heavy Fermion Compound URu2Si2
• Γ3-type Lattice Instability and the Hidden Order of URu2Si2
• Hybridization-Driven Orthorhombic Lattice Instability in URu2Si2
• Cyclotron resonance study of quasiparticle mass and scattering rate in the hidden-order and superconducting phases of URu2Si2
• High frequency magnetic oscillations of the organic metal $\theta$-(ET)${}_4$ZnBr${}_4$(C${}_6$H${}_4$Cl${}_2$) in pulsed magnetic field of up to 81 T
• Angular Dependence of the High-Magnetic-Field Phase Diagram of URu2Si2

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• Collinear antiferromagnetic order in URu${}_2$Si${}_{2-x}$P${}_x$ revealed by neutron diffraction
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