6533b7dafe1ef96bd126e975

RESEARCH PRODUCT

Quantum simulations in materials science: molecular monolayers and crystals

M. ReberM. ReberD. LödingChr. RickwardtM. PresberPeter NielabaPeter Nielaba

subject

PhotonMaterials scienceMonte Carlo methodGeneral Physics and AstronomyCrystallographic defectMolecular physicsThermal expansionCondensed Matter::Materials ScienceHardware and ArchitectureMonolayerPath integral formulationPhysical chemistryGraphitePhysics::Chemical PhysicsPath integral Monte Carlo

description

Low temperature properties and anomalies in crystals and molecular monolayers are studied by path integral Monte Carlo (PIMC) simulations. For light particles (H 2 , D 2 ) 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, N 2 ) is in much better agreement with experiments compared to the results obtained with purely classical simulations.

https://doi.org/10.1016/s0010-4655(99)00397-5