Specific heat and NMR of the Kondo system YbPd2Si2

Temperature and pressure-induced valence transitions inYbNi2Ge2andYbPd2Yamaoka1, Jarrige2, Tsujii3 et al. 2010Phys. Rev. B506560View full textAdd to dashboardCite

“…For YbPd 2 Si 2 , Sampathkumaran et al 12 obtained v = 2.82Ϯ 0.08 at 16 K and v = 2.89Ϯ 0.08 at 300 K from the analysis of their XAS spectra. Besnus et al 45 derived v = 2.89 from the specific-heat measurement. Schlottmann 10 analyzed the magnetic susceptibility of YbPd 2 Si 2 by the Anderson model with = 4 and T K = 87 K and obtained v = 2.82 at T = 0 K. These values are overall comparable to our estimations based on RXES.…”

High pressure effects on the electrical resistivity behavior of the Kondo lattice, YbPd2Si2

“…Temperature dependencies of magnetic susceptibility, x-ray absorption and x-ray photoemission spectra [13] clearly established that this is a fluctuating valent non-magnetic compound with a fractional valence of Yb very close to 3 with a very weak temperature dependence. ) of electronic co-efficient [15,16]. This compound subsequently generated some interest involving many other experimental methods, including NMR [16], inelastic neutron scattering [17], Yb-quadrupolar moment studies [18], Hall effect and magnetoresistance [19].…”

“…of electronic co-efficient [15,16]. This compound subsequently generated some interest involving many other experimental methods, including NMR [16], inelastic neutron scattering [17], Yb-quadrupolar moment studies [18], Hall effect and magnetoresistance [19]. In addition, this compound attracted a theoretical interest as well; Schlottmann [20] examined the properties of this compound within the framework of the single-ion Anderson model revealing thereby that the Kondo temperature is of the order of 100 K. It is however surprising that this nearly-trivalent non-magnetic Yb compound has not been studied by high P experiments till to date to simulate an interplay between magnetism and the Kondo effect, particularly noting that the isostructural Yb-based The sample in the polycrystalline form was prepared by arc melting stoichiometric amounts of constituent elements in an atmosphere of argon.…”

Transmission phase shifts of Kondo impurities

“…Thus, there is no elastic singleparticle scattering off a 2CK impurity at the non-Fermi liquid fixed point. The 2CK system was first discussed as a purely theoretical problem 10 , but it was soon invoked as a candidate explanation for remarkable low-energy properties of some heavy fermion materials [13][14][15][16] and glassy metals [17][18][19][20][21] and more recently in graphene [22][23][24][25] . In the past decade, a few single-impurity realizations of the 2CK system were proposed [26][27][28][29][30] , offering the hope of microscopically manipulating system parameters, and one of the proposals 29 was built and measured 31 .…”