2009/03/23 by H. Shishido, Hiroaki Shishido, K. Hashimoto +17
Chemistry · Materials Science · Physics and Astronomy · #Anomaly (physics) #Chemistry #Condensed matter physics #Electrical resistivity and conductivity #Fermi surface #Field (mathematics) #Impurity #Iron-based superconductors research #Magnetic field #Order (exchange) #Oscillation (cell signaling) #Phase (matter) #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Scattering #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.102.156403
published as Phys. Rev. Lett. 102, 156403 (2009) · 4 pages, 4 figures, accepted for publication in Physical Review Letters
arxiv created 2009/03/23 · openalex publication_date 2009/04/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
To elucidate the underlying nature of the hidden order (HO) state in heavy-fermion compound URu(2)Si(2), we measure electrical transport properties of ultraclean crystals in a high field, low temperature regime. Unlike previous studies, the present system with much less impurity scattering resolves a distinct anomaly of the Hall resistivity at H;* = 22.5 T, well below the destruction field of the HO phase = or approximately 36 T. In addition, a novel quantum oscillation appears above a magnetic field slightly below H;*. These results indicate an abrupt reconstruction of the Fermi surface, which implies a possible phase transition well within the HO phase caused by a band-dependent destruction of the HO parameter.