Real Space Imaging of Ballistic Carrier Propagation in Bi Single Crystals

Hot electron lifetimes in metals probed by time-resolved two-photon photoemission

“…Such anisotropic transport due to a non-spherical Fermi surface was predicted before [119] and experimentally also observed in Bi, Ag and W [120,121].…”

Ballistic transport and electronic structure

“…The difference between the extrapolated value and the value obtained using 48 3 k points is smaller than 0.01ϫ10…”

“…It was pointed out by Sharvin 1 that electrical transport in ballistic samples is a sensitive tool to study Fermi surface properties, as has been demonstrated by electron focusing experiments. 2,3 In studies of electrical transport through single ballistic point contacts attention has often been focussed on the nonlinear phenomena in the current-voltage characteristics. The observed deviations from Ohm's law can be used for a spectral analysis of the interaction mechanisms of the conduction electrons with elementary excitations in metals.…”

“…We make use of the linear-muffin-tin orbital ͑LMTO͒ method in the atomic-spheres approximation ͑ASA͒. 67,68 For the bulk calculations presented in this section the electronic structure was calculated self-consistently using a mesh of 12 3 k points in the first Brillouin zone. Unless stated otherwise a basis of s, p, and d orbitals is used; the effect of f states is discussed below.…”

“…The solid and dashed lines are the Sharvin conductances for transport in the ͑100͒ direction for the majority and minority spin electrons, respectively. The conductances were calculated using 48 3 k points in the first Brillouin zone. negligible for Cu, the largest deviation being 0.003ϫ10 15 ⍀ Ϫ1 m Ϫ2 for the ͑100͒ direction.…”