Novel structures in 'simple' metals

Stacking - fault energies in simple metals : applications to BCC metals

We present a general method for calculating the stacking-fault energy in simple metals, and then we apply this to the ( 1 1 2 ) faults in body-centred cubic (BCC) metals. Our method contains no approximations for a given wavenumber characteristic (or equivalently the pair potential). Our results show that metastable faults do indeed exist in the simple BCC metals (Li, Na. K, Rb, Cs, Ca. Sr, Ba)...

Freezing of simple liquid metals

Freezing of simple liquid metals and the relative stabilities of competing crystalline solids are investigated using thermodynamic perturbation theory, the interactions between ions being modeled by e€ective pair potentials derived from pseudopotential theory. The ionic free energy of the solid phase is calculated, to ®rst order in the perturbation potential, using classical density-functional ...

Surface-plasmon dispersion in simple metals.

Angle-resolved reflection inelastic electron scattering has been used to measure the dispersion of the surface plasmon for thick films of Na and K. The measured dispersion is negative at small momentum parallel to the surface as predicted by quantum-mechanical calculations of the dynamic response of the electrons at the surface of an interacting electron gas. A simple physical picture is presen...

Domain structures in magnetoresistive granular metals

We have imaged the magnetic domain structure of several heterogeneous CoxAg12x alloys by using scanning electron microscopy with polarization analysis. These images show that extended domain structures exist in both the as-deposited samples and in samples annealed at moderate temperatures. This suggests that a significant fraction of the cobalt in these materials does not contribute to the gian...

Surface core-level shifts for simple metals.