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- W3058492703 abstract "The Lennard-Jones (LJ) potential is perhaps one of the most widely used models for the interaction of uncharged particles, such as noble gas solids. The phase diagram of the classical LJ solid is known to exhibit transitions between hcp and fcc phases. However, the phase behavior of the quantum LJ solid remains unknown. Thermodynamic integration based on path integral molecular dynamics (PIMD) and lattice dynamics calculations are used to study the phase stability of the hcp and fcc LJ solids. The hcp phase is shown to be stabilized by quantum effects in PIMD, while fcc is shown to be favored by lattice dynamics, which suggests a possible re-entrant low pressure fcc phase for highly quantum systems. Implications for the phase stability of noble gas solids are discussed. For parameters equating to helium, the expansion due to zero-point vibrations is associated with quantum melting: neither crystal structure is stable at zero pressure." @default.
- W3058492703 created "2020-08-24" @default.
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- W3058492703 date "2020-08-21" @default.
- W3058492703 modified "2023-10-18" @default.
- W3058492703 title "Phase behavior of the quantum Lennard-Jones solid" @default.
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- W3058492703 doi "https://doi.org/10.1063/5.0017973" @default.
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