Competing Ordered Phases in URu2Si2: Hydrostatic Pressure and Re-substitution
J. R. Jeffries, N. P. Butch, B. T. Yukich, and M. B. Maple
TL;DR
This study investigates how hydrostatic pressure and Re substitution influence the competing ordered phases in URu2Si2, revealing a critical pressure where the hidden order transition is notably affected, impacting superconductivity and electronic structure.
Contribution
It provides new insights into the pressure-induced phase transitions and the interplay between hidden order and superconductivity in URu2Si2 with Re substitution.
Findings
Kink in transition temperature at critical pressure Pc=15 kbar
Destruction of superconductivity at Pc
Change in spin excitation gap and Fermi surface gapping
Abstract
A persistent kink in the pressure dependence of the \hidden order" (HO) transition temperature of URu2-xRexSi2 is observed at a critical pressure Pc=15 kbar for 0 < x < 0.08. In URu2Si2, the kink at Pc is accompanied by the destruction of superconductivity; a change in the magnitude of a spin excitation gap, determined from electrical resistivity measurements; and a complete gapping of a portion of the Fermi surface (FS), inferred from a change in scattering and the competition between the HO state and superconductivity for FS fraction.
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