Pressure-tuned point-contact spectroscopy of URu<mml:mrow/>2Si<mml:mrow/>2from hidden order to antiferromagnetic states: Similarity of the Fermi surface gapping

2011/12/23 by Xin Lu, F. Ronning, Paul H. Tobash +5
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Algorithm #Antiferromagnetism #Chemistry #Computer science #Condensed matter physics #Crystallography #Iron-based superconductors research #Materials science #Order (exchange) #Physics #Rare-earth and actinide compounds #Spectroscopy #State (computer science) #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.85.020402

published as Phys. Rev. B 85, 020402 (R) (2012) · 5 pages, 3 figures, accepted to be published in Phys. Rev. B as rapid communication

arxiv created 2011/12/23 · openalex publication_date 2012/01/04 · arxiv updated 2012/01/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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 clue to unraveling the puzzling HO state.

Citations

• Magnetic state in URu2Si2, UPd2Al3, and UNi2Al3 probed by point contacts
• Electronic structure theory of the hidden-order materialURu2Si2
• Group theory and octupolar order inURu2Si2
• Precise Study of the Resonance at Q0=(1,0,0) in URu2Si2
• Electron Cotunneling into a Kondo Lattice
• Gapped itinerant spin excitations account for missing entropy in the hidden-order state of URu2Si2