Abstract

Low temperature properties and anomalies in crystals and molecular monolayers are studied by path integral Monte Carlo (PIMC) simulations. For light particles (H2,D2) adsorbed on graphite anomalies in the transition to the low temperature 3 -phases have been observed in experiments and are analyzed by PIMC. The computed thermal expansion of various crystalline materials (Si,N2) is in much better agreement with experiments compared to the results obtained with purely classical simulations.

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