Fermi surface properties and de Haas–van Alphen oscillation in both the normal and superconducting mixed states of URu₂Si₂

A minimal model for “Hidden Order” in URu2Si2

“…Angle-resolved photoemission [5][6][7][8][9][10] and neutronscattering experiments [11][12][13] indicate that the transition may be driven by Fermi-surface nesting with wave vector (0,0,1) and, at the transition, the structure changes from bodycentred tetragonal to simple tetragonal. The results of quantum oscillation experiments [14][15][16] in the ordered state are consistent with electronic structure calculations based on the simple tetragonal structure [17]. Despite almost 30 years since its discovery, the nature of the order parameter is still unknown and the low-temperature phase has come to be known as the "Hidden Order" phase [18].…”

Unfolding the physics of URu2Si2 through silicon to phosphorus substitution

“…Data for x =0 is from ref. 38. ( e ) The Kohler scaled electrical resistivity versus the reduced field H / R 0 for 0≤ x ≤0.028.…”

Signatures of broken spin-rotational invariance in the “Hidden Ordered” compound URu2Si2?

“…To the contrary, the strong Ising character of the system would seem to indicate that a localized crystal field description [69] is appropriate. The strong Ising character of the system is inferred from 16 zeros of the spin-splitting factor found in de Haas -van Alphen experiments [68,90], and is reviewed in the article by Chandra et al in this issue [73]. However, the absence of signatures of crystal fields in the neutron-scattering data and the report [24] that colossal Ising anisotropy can also be obtained from (itinerant) relativistic density functional calculations which suggest that the Ising-like anisotropy may be common to theoretical descriptions which assume either localized or itinerant starting points.…”