Pressure-Tuned Point-Contact Spectroscopy of URu2Si2 from Hidden Order to Antiferromagnetic States: Similarity of the Fermi Surface Gapping

Abstract

We report soft point-contact spectroscopy studies of URu2Si2 both in the hidder order (HO) and the large-moment antiferromagnetic (LMAF) states accessed by pressure. In the HO state at ambient pressure, the spectroscopy shows two asymmetric peaks around the Fermi energy that emerge below the hidden order temperature T_{HO}. In the LMAF state at higher pressures, the spectra are remarkably similar to those in the HO state, indicating a similar Fermi surface gapping in the HO and LMAF states and providing a new clue to unraveling the puzzling HO state.

5 pages, 3 figures, accepted to be published in Phys. Rev. B as rapid communication

References in corpus (6)

• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Gapped itinerant spin excitations account for missing entropy in the hidden order state of URu${}_2$Si${}_2$
• Fermi surface instability at the hidden-order transition of URu2Si2
• Electron Cotunneling into a Kondo Lattice
• Antiferromagnetic critical pressure in URu2Si2 under hydrostatic conditions
• Competing Ordered Phases in URu2Si2: Hydrostatic Pressure and Re-substitution

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• Hidden Order Behaviour in URu2Si2 (A Critical Review of the Status of Hidden Order in 2014)
• Symmetry and correlations underlying Hidden Order in URu2Si2
• Two-channel point-contact tunneling theory of superconductors
• Nuclear magnetic resonance studies of pseudospin fluctuations in URu${}_2$Si${}_2$
• 3D Modulated Spin Liquid model applied to URu${}_2$Si${}_2$
• Global perspectives of the bulk electronic structure of URu${}_2$Si${}_2$ from angle-resolved photoemission
• Origin of gap-like behaviors in URu${}_2$Si${}_2$: Combined study via quasiparticle scattering spectroscopy and resistivity measurements
• Heat capacity of URu${}_{2-x}$Os${}_x$Si${}_2$ at low temperatures
• Spatial interferences in the electron transport of heavy fermion materials