Since the end of the cold war, macroscopic amounts of separated stable isotopes of most
elements have been available “off the shelf” at affordable prices. Using these materials …

The path-integral formulation of the statistical mechanics of quantum many-body systems is
described, with the purpose of introducing practical techniques for the simulation of solids …

We report measurements of lattice constants of single-crystal synthetic diamonds that cover
the range of isotopic compositions from almost-pure C 12 to almost-pure C 13. These …

Considerable progress has been made in recent years in the field of ab initio calculations of
electronic band structures of semiconductors and insulators. The one-electron states (and …

The effects of zero-point motion and the anharmonicity of the lattice vibrations of diamond
have been explored theoretically in the context of a valence force model explicitly …

Scientific interest, technological promise, and increased availability of highly enriched
isotopes have led to a sharp rise in the number of experimental and theoretical studies with …

We calculate the isotope and temperature shifts of the indirect and direct band gaps in
natural silicon (M= 28.09 u), in natural diamond C 12 and its isotope C 13, in natural …

70Ge and 74Ge isotopes were successfully separated from natural Ge and zone purified.
Several highly enriched, high purity 70Ge and 74Ge single crystals were grown by the …

The lattice constants of diamond crystals consisting of an isotopic mixture of C x 12 13 C (1−
x) were measured as a function of the isotopic composition by single-crystal diffractometry …

Gem-quality diamonds of varying isotopic composition have been synthesized by sequential
application of chemical vapor deposition and high-pressure technologies of diamond …