The Fermi surface of platinum

Abstract

We have made measurements of the extremal cross-sectional areas of the open hole surface of the Fermi surface of platinum for the previously unobserved, heavy mass orbits centered on F and X with the magnetic field along the [100] and [110] directions, respectively. When combined with previous measurements, the necessary data associated with all classes of orbits on all three sheets of the surface are now available. Using a relativistic non-muffin-tin, Korringa-Kohn-Rostoker formalism, data were fitted using the scattering phase shifts associated with the appropriate irreducible relativistic cubic representations as disposable parameters (through l = 2) to an accuracy of 0.3%. The resulting radii of all sheets of the Fermi surface are reported. A volume integration yields the necessary charge neutrality for this even-valent metal to within 1%. Next, available cyclotron mass data were fitted using the energy derivatives of the scattering phase shifts as disposable parameters (many-body effects being absorbed in the parameter set) to an accuracy of 3.4 % ; here the measured total electronic density of states was used as a constraint. The resulting Fermi velocities are also reported.

Fermi Surface Properties of Platinum

“…Our results are consistent with those from Bordoloi and Auluck [33], Watson-Yang et al [34], and Dye et al [8]. …”

“…We have calculated the band masses for these orbits using Slater Xu-XC and experimental cyclotron masses from Dye et al [8] [34] and Dye et al [8] are also shown for comparison. The calculations of the former have been made on the basis of a first-principles RAPW warped-muffin-tin method, while those of the latter are results of a RKKR fitting scheme.…”

Indirect heating of Pt by short-pulse laser irradiation of Au in a nanoscale Pt/Au bilayer

“…Using v F = 0.24 × 10 6 m sec −1 for the [111] direction of Pt [24] and v F = 1.4 × 10 6 m sec −1 from the free-electron model for Au, the DMM prediction for is 15.5 MW m −2 K −2 , i.e., G ee 5 GW m −2 K −1 at room temperature. We have previously shown that the Wiedemann-Franz law works well in predicting the thermal conductance of Pd/Ir interfaces [14].…”

β-NMR study of isolated8Li+in the enhanced paramagnet platinum

“…One of these (the 6 band) is broad while the other (XW 5) is substantially narrower, contributing about 80% of the density of states at E F . 35,36 We identify these as the s and d bands, respectively, in our simplified discussion. We expect a similar decomposition of the shift applies to the 8 Li impurity hyperfine coupled to the host conduction bands, but the relative magnitudes of each term will be substantially different than for the host nuclear spins.…”

“…This interband coupling must be weak enough that it does not substantially alter the overall band structure that is consistent with low-temperature quantum oscillations. 36 Saturation by this mechanism is reminiscent (perhaps fortuitously) of the Kondo screening of a local magnetic impurity by a degenerate conduction band, where far below the Kondo temperature, the CW-like χ saturates. 46 In this context, consider the effect of the interstitial Li + .…”