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dc.contributor.authorWu, TMen_US
dc.contributor.authorChang, SLen_US
dc.contributor.authorTsai, KHen_US
dc.date.accessioned2014-12-08T15:19:07Z-
dc.date.available2014-12-08T15:19:07Z-
dc.date.issued2005-05-22en_US
dc.identifier.issn0021-9606en_US
dc.identifier.urihttp://dx.doi.org/10.1063/1.1900726en_US
dc.identifier.urihttp://hdl.handle.net/11536/13700-
dc.description.abstractAt low-enough fluid densities, we have found some naive singular behavior, like the van Hove singularities in the phonon spectra of lattices, appearing in the instantaneous normal mode spectra of the Lennard-Jones (LJ) 2n-n fluids, which serve as a prototype of topologically disordered systems. The singular behavior cannot be predicted by the mean-field theory, but interpreted by the perturbed binary modes of some special pairs, called the mutual nearest neighbor pairs, at separations corresponding to the extreme binary frequencies, which are solely determined by the attractive part of the LJ 2n-n pair potential. By reducing the range of attraction in the pair potential under the conditions of the same particle diameter and well depth, the tendency for the appearance of the singular behavior shifts to higher fluid densities. From this study, we conclude that pair potential with a short-range attraction can be a mechanism to produce a counterpart of the van Hove singularity in the vibrational spectra of disordered systems without a reference lattice. 2005 American Institute of Physics.en_US
dc.language.isoen_USen_US
dc.titleMechanism for singular behavior in vibrational spectra of topologically disordered systems: Short-range attractionsen_US
dc.typeArticleen_US
dc.identifier.doi10.1063/1.1900726en_US
dc.identifier.journalJOURNAL OF CHEMICAL PHYSICSen_US
dc.citation.volume122en_US
dc.citation.issue20en_US
dc.citation.epageen_US
dc.contributor.department物理研究所zh_TW
dc.contributor.departmentInstitute of Physicsen_US
dc.identifier.wosnumberWOS:000229544500040-
dc.citation.woscount2-
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