Skip to main content
eScholarship
Open Access Publications from the University of California

UC Irvine

UC Irvine Previously Published Works bannerUC Irvine

Strong correlation between anomalous quasiparticle scattering and unconventional superconductivity in the hidden-order phase of URu 2Si 2

  • Author(s): Tateiwa, N
  • Matsuda, TD
  • Onuki, Y
  • Haga, Y
  • Fisk, Z
  • et al.
Abstract

The pressure dependent electrical resistivity of URu 2Si 2 has been studied at high pressure across the first order phase boundary of P x where the ground state switches under pressure from "hidden order" (HO) to large moment antiferromagnetic (LAFM) states. The electrical transport in URu 2Si 2 at low temperatures shows a strong sample dependence. We have measured an ultraclean single crystal whose quality is the highest among those used in previous studies. The generalized power law ρ=ρ 0+A nTn analysis finds that the electric transport property deviates from Fermi liquid theory in the HO phase but obeys the theory well above P x. The analysis using the polynomial in T expression ρ= ρ 0+α 1T+α 2T2 reveals the relation α 1/α 2 T sc in the HO phase. While the pressure dependence of α 2 is very weak, α 1 is roughly proportional to T sc. This suggests a strong correlation between the anomalous quasiparticle scattering and the superconductivity and that both have a common origin. The present study clarifies a universality of the HO phase inherent in strongly correlated electron superconductors near quantum criticality. © 2012 American Physical Society.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View