2006/10/04 by Hongtao Yuan, H. Q. Yuan, M. Nicklas +3 · 34 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Electrical resistivity and conductivity #Fermi liquid theory #Ferromagnetism #Iron-based superconductors research #Materials science #Nuclear physics #Paramagnetism #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Residual resistivity #Scattering #Strongly correlated material #Superconductivity #Valence (chemistry) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.74.212403
published in Physical Review B 74(21) (American Physical Society) · 4 pages, 5 figures
arxiv created 2006/10/04 · openalex publication_date 2006/12/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the pressure-temperature phase diagram of YbIr2Si2 by measuring the electrical resistivity \ensuremathρ(T). In contrast to the widely investigated YbRh2Si2, YbIr2Si2 is a paramagnetic metal below pc\ensuremath≃8\phantom\rule0.3em0exGPa. Interestingly, a first-order, presumably ferromagnetic, transition develops at pc. Similar magnetic properties were also observed in YbRh2Si2 and YbCu2Si2 at sufficiently high pressures, suggesting a uniform picture for these Yb compounds. The ground state of YbIr2Si2 under pressure can be described by Landau Fermi-liquid theory, in agreement with the nearly ferromagnetic Fermi-liquid model. Moreover, evidence of a weak valence transition, characterized by a jump of the Kadowaki-Woods ratio as well as an enhancement of the residual resistivity \ensuremathρ0 and of the quasiparticle-quasiparticle scattering cross section, is observed around 6\phantom\rule0.3em0exGPa.