Ultra-High Resolution Neutron Spectroscopy of Low-Energy Spin Dynamics in UGe${}_2$

Abstract

Studying the prototypical ferromagnetic superconductor UGe${}_2$ we demonstrate the potential of the Modulated IntEnsity by Zero Effort (MIEZE) technique---a novel neutron spectroscopy method with ultra-high energy resolution of at least 1~$\mu$eV---for the study of quantum matter. We reveal purely longitudinal spin fluctuations in UGe${}_2$ with a dual nature arising from $5f$ electrons that are hybridized with the conduction electrons. Local spin fluctuations are perfectly described by the Ising universality class in three dimensions, whereas itinerant spin fluctuations occur over length scales comparable to the superconducting coherence length, showing that MIEZE is able to spectroscopically disentangle the complex low-energy behavior characteristic of quantum materials.

arXiv comment7 pages, 9 figures, supplemental materials

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Cited by in corpus (14)

• MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems
• The longitudinal neutron resonant spin echo spectrometer RESEDA
• Time of Flight Modulation of Intensity by Zero Effort on Larmor
• Dual nature of magnetism in MnSi
• Novel critical behavior of magnetization in URhSi:Similarities to uranium ferromagnetic superconductors UGe${}_2$ and URhGe
• Coexisting Kondo hybridization and itinerant f-electron ferromagnetism in UGe2
• Neutron Depolarization due to Ferromagnetism and Spin Freezing in CePd${}_{1-x}$Rh${}_x$
• Dualism of the 4f electrons and high-temperature antiferromagnetism of the heavy-fermion compound YbCoC${}_2$
• High-field moment polarization in the itinerant ferromagnet URhSi
• Extending MIEZE spectroscopy towards thermal wavelengths
• Experimental determination of the spin Hamiltonian of the cubic chiral magnet MnSi
• MIASANS at the longitudinal neutron resonant spin-echo spectrometer RESEDA
• Critical magnetic fluctuations in the layered ruthenates Ca${}_2$RuO${}_4$ and Ca${}_3$Ru${}_2$O${}_7$
• Paramagnetic fluctuations of the magnetocaloric compound MnFe${}_4$Si${}_3$