Kapfer Krauth 2014
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'''S. C. Kapfer, W. Krauth ''' | '''S. C. Kapfer, W. Krauth ''' | ||
'''''Soft-disk melting: From liquid-hexatic coexistence to continuous transitions ''''' ''' arXiv:1406.7224 (2014)''' | '''''Soft-disk melting: From liquid-hexatic coexistence to continuous transitions ''''' ''' arXiv:1406.7224 (2014)''' | ||
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To appear in '''Physical Review Letters (2015)''' | To appear in '''Physical Review Letters (2015)''' | ||
Revision as of 22:48, 17 December 2014
S. C. Kapfer, W. Krauth Soft-disk melting: From liquid-hexatic coexistence to continuous transitions arXiv:1406.7224 (2014)
To appear in Physical Review Letters (2015)
Paper (Preprint)
Abstract The phase diagram of two-dimensional soft disks with repulsive power-law pair interactions ∝r^(−n) is determined using Event-Chain Monte Carlo. The recently established melting scenario for hard disks (corresponding to n=∞) is preserved for finite n, and first-order liquid-hexatic and continuous hexatic-solid transitions are identified. The density difference between the coexisting hexatic and liquid is non-monotonous as a function of n. For smaller n, the coexisting liquid shows extremely long orientational correlations, and positional correlations in the hexatic become extremely short. For n≲6, the liquid-hexatic transition is continuous, with correlations consistent with the KTHNY scenario.