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Richard D. EttersProfessor 
Condensed Matter TheoryTwo major areas of research are emphasized. These involve investigations of the static and dynamic properties of simple molecular solids and fluids, both at zero external pressure and at high pressures, and the properties of molecular surfaces and fractional, monolayer and multilayer deposits of admolecules on heterogeneous substrates such as graphite.The bulk molecular solids and fluids calculations include determinations of the equilibrium structures and orientations, phase transitions, lattice vibrational and librational frequencies, intramolecular mode frequencies, second virial coefficients, pressure-volume relations, sublimation energies, phonon velocities, magnetic order, specific heats, and compressibilities. In addition, various properties of matrix isolated atomic and molecular impurities in solid atomic host lattices are determined. The surface studies include determinations of the equilibrium structures and molecular orientations near the surface, and surface libron, vibron, and phonon modes of excitation in bulk solids. For the molecular layers on heterogeneous substrates, equilibrium structures and orientations are determined for various surface densities versus temperature. Also determined are structural, orientational melting, and magnetic phase transitions, specific heats, and librational and vibrational modes of excitation. |