Field-induced spin-density wave beyond hidden order in URu2Si2

Abstract

URu2Si2 is one of the most enigmatic strongly-correlated-electron systems and offers a fertile testing ground for new concepts in condensed matter science. In spite of >30 years of intense research, no consensus on the order parameter of its low-temperature hidden-order phase exists. A strong magnetic field transforms the hidden order into magnetically-ordered phases, whose order parameter has also been defying experimental observation. Here, thanks to an instrumentation breakthrough in high-field neutron scattering, we identify the field-induced phases of URu2Si2 as a spin-density-wave state with wavevector k1 = (0.6 0 0). The transition to the spin-density wave represents a unique touchstone for understanding the hidden-order phase. An intimate relationship between this magnetic structure, the magnetic fluctuations, and the Fermi surface is emphasized, calling for dedicated band structure calculations.

arXiv comment22 pages, 4 Figures + supplementary information (3 pages, 1 table)

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• Charge density wave with anomalous temperature dependence in UPt2Si2
• Pressure-Induced Rotational Symmetry Breaking in URu${}_2$Si${}_2$
• Search for Multipolar Instability in URu${}_2$Si${}_2$ Studied by Ultrasonic Measurements under Pulsed Magnetic Field
• Electronic properties of a heavy-fermion U(Ru0.92Rh0.08)2Si2 single crystal
• A concise 40 T pulse magnet for condensed matter experiments
• Interwoven atypical quantum states in CeLiBi${}_2$
• Incommensurate antiferromagnetism in UTe2 under pressure
• Magnetoelastic coupling in URu2Si2: Probing multipolar correlations in the hidden order state
• Magnetic structure in U(Ru0.92Rh0.08)2Si2 single crystal studied by neutron diffraction in static magnetic fields up to 24 T
• Neutron Diffraction Study on Single-crystalline UAu${}_2$Si${}_2$
• Spin-density-wave order controlled by uniaxial stress in CeAuSb${}_2$
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• One-dimensional moire charge density wave in the hidden order state of URu2Si2 induced by fracture
• Field-induced phases in a heavy-fermion U(Ru${}_{0.92}$Rh${}_{0.08}$)${}_2$Si${}_2$ single crystal
• Magnetic-field-controlled spin fluctuations and quantum criticality in Sr3Ru2O7