%0 Journal Article %1 Gnan2014Multiple %A Gnan, Nicoletta %A Das, Gayatri %A Sperl, Matthias %A Sciortino, Francesco %A Zaccarelli, Emanuela %D 2014 %J Physical Review Letters %K a-singularities, glass-glass-transition, mode-coupling-theory critical-phenomena glasses %N 25 %R 10.1103/PhysRevLett.113.258302 %T Multiple Glass Singularities and Isodynamics in a Core-Softened Model for Glass-Forming Systems %U http://dx.doi.org/10.1103/PhysRevLett.113.258302 %V 113 %X We investigate the slow dynamics of a colloidal model with two repulsive length scales, whose interaction potential is the sum of a hard-core and a square shoulder. Despite the simplicity of the interactions, Mode-Coupling theory predicts a complex dynamic scenario: a fluid-glass line with two reentrances and a glass-glass line ending with multiple higher-order (\$A\_3\$ or \$A\_4\$) singularities. In this work we verify the existence of the two \$A\_4\$ points by numerical simulations, observing subdiffusive behaviour of the mean-square displacement and logarithmic decay of the density correlators. Surprisingly, we also discover a novel dynamic behaviour generated by the competition between the two higher-order singularities. This results in the presence of special loci along which the dynamics is identical at all length and time scales.

@article{Gnan2014Multiple, abstract = {We investigate the slow dynamics of a colloidal model with two repulsive length scales, whose interaction potential is the sum of a hard-core and a square shoulder. Despite the simplicity of the interactions, Mode-Coupling theory predicts a complex dynamic scenario: a fluid-glass line with two reentrances and a glass-glass line ending with multiple higher-order (\$A\_3\$ or \$A\_4\$) singularities. In this work we verify the existence of the two \$A\_4\$ points by numerical simulations, observing subdiffusive behaviour of the mean-square displacement and logarithmic decay of the density correlators. Surprisingly, we also discover a novel dynamic behaviour generated by the competition between the two higher-order singularities. This results in the presence of special loci along which the dynamics is identical \textit{at all} length and time scales.}, added-at = {2019-06-10T14:53:09.000+0200}, archiveprefix = {arXiv}, author = {Gnan, Nicoletta and Das, Gayatri and Sperl, Matthias and Sciortino, Francesco and Zaccarelli, Emanuela}, biburl = {https://www.bibsonomy.org/bibtex/20e87908e2f661084100b85381e7b2129/nonancourt}, citeulike-article-id = {13324390}, citeulike-linkout-0 = {http://dx.doi.org/10.1103/PhysRevLett.113.258302}, citeulike-linkout-1 = {http://arxiv.org/abs/1407.3917}, citeulike-linkout-2 = {http://arxiv.org/pdf/1407.3917}, day = 18, doi = {10.1103/PhysRevLett.113.258302}, eprint = {1407.3917}, interhash = {5f8f83aa8765077c792b6783c898c2e1}, intrahash = {0e87908e2f661084100b85381e7b2129}, issn = {1079-7114}, journal = {Physical Review Letters}, keywords = {a-singularities, glass-glass-transition, mode-coupling-theory critical-phenomena glasses}, month = dec, number = 25, posted-at = {2014-08-13 10:58:32}, priority = {2}, timestamp = {2019-07-31T12:31:28.000+0200}, title = {{Multiple Glass Singularities and Isodynamics in a Core-Softened Model for Glass-Forming Systems}}, url = {http://dx.doi.org/10.1103/PhysRevLett.113.258302}, volume = 113, year = 2014 }