Complex Crystals from Size-Disperse Spheres

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Bommineni PK, Varela-Rosales NR, Klement M, Engel M
Zeitschrift: Physical Review Letters
Jahr der Veröffentlichung: 2019
Band: 122
Heftnummer: 12
ISSN: 0031-9007


Colloids are rarely perfectly uniform but follow a distribution of sizes, shapes, and charges. This dispersity can be inherent (static) or develop and change over time (dynamic). Despite a long history of research, the conditions under which nonuniform particles crystallize and which crystal forms is still not well understood. Here, we demonstrate that hard spheres with Gaussian radius distribution and dispersity up to 19% always crystallize if compressed slowly enough, and they do so in surprisingly complex ways. This result is obtained by accelerating event-driven simulations with particle swap moves for static dispersity and particle resize moves for dynamic dispersity. Above 6% dispersity, AB(2) Laves, AB(13), and a region of Frank-Kasper phases are found. The Frank-Kasper region includes a quasicrystal approximant with Pearson symbol oS276. Our findings are relevant for ordering phenomena in soft matter and alloys.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Bommineni, Praveen Kumar Dr.
Juniorprofessur für Modellierung von Selbstorganisationsprozessen
Engel, Michael Prof. Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems
Klement, Marco
Juniorprofessur für Modellierung von Selbstorganisationsprozessen


Bommineni, P.K., Varela-Rosales, N.R., Klement, M., & Engel, M. (2019). Complex Crystals from Size-Disperse Spheres. Physical Review Letters, 122(12).

Bommineni, Praveen Kumar, et al. "Complex Crystals from Size-Disperse Spheres." Physical Review Letters 122.12 (2019).


Zuletzt aktualisiert 2019-15-04 um 12:53