@article{oai:nagoya.repo.nii.ac.jp:00005539,
 author = {Watanabe, Hiroshi and Yukawa, Satoshi and Ito, Nobuyasu},
 issue = {1},
 journal = {Physical Review E},
 month = {Jan},
 note = {In order to investigate the effect of size dispersity on two-dimensional melting transitions, hard-disk systems with equimolar bidispersity are studied by means of particle dynamics simulations. From the nonequilibrium relaxation behaviors of bond-orientational order parameters, we find that (i) there is a critical dispersity at which the melting transition of the hexagonal solid vanishes and (ii) the quadratic structure is metastable in a certain region of the dispersity-density parameter space. These results suggest that the dispersity not only destroys order but produces new structures under certain specific conditions.},
 pages = {016702--016702},
 title = {Size-dispersity effects in two-dimensional melting},
 volume = {71},
 year = {2005}
}