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44 papers · 1 filter
Step bunching during Si(001) homoepitaxy caused by the surface diffusion anisotropy
J. Myslivecek, C. Schelling, F. Schaffler +4
Scanning tunneling microscopy experiments show that the unstable growth morphology observed during molecular beam homoepitaxy on slightly vicinal Si(001) surfaces consists of strai…
Weak axial nuclear heavy meson exchange currents and interactions of solar neutrinos with deuterons
B. Mosconi, P. Ricci, E. Truhlik
Starting from the axial heavy meson exchange currents, constructed earlier in conjunction with the Bethe--Salpeter equation, we first present the axial --, -- and meson…
Generalizations of pp-wave spacetimes in higher dimensions
A. Coley, R. Milson, N. Pelavas +3
We shall investigate -dimensional Lorentzian spacetimes in which all of the scalar invariants constructed from the Riemann tensor and its covariant derivatives are zero. These s…
Proton spin structure and valence quarks
Petr Zavada
The spin structure of the system of quasifree fermions having total angular momentum is studied in a consistently covariant approach. Within this model the relations betwee…
First-principles Simulations of the stretching and final breaking of Al nanowires: Mechanical properties and electrical conductance
Pavel Jelínek, Rubén Pérez, José Ortega +1
The evolution of the structure and conductance of an Al nanowire subject to a tensile stress has been studied by first-principles total-energy simulations. Our calculations show th…
Three-dimensional harmonic oscillator and time evolution in quantum mechanics
Pavel Kundrat, Milos V. Lokajicek
The problem of defining time (or phase) operator for three-dimensional harmonic oscillator has been analyzed. A new formula for this operator has been derived. The results have bee…