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Crystal-melt interfacial free energy of binary hard spheres from capillary fluctuations
dc.contributor.author | Amini, Majeed | |
dc.contributor.author | Laird, Brian Bostian | |
dc.date.accessioned | 2014-12-16T21:13:44Z | |
dc.date.available | 2014-12-16T21:13:44Z | |
dc.date.issued | 2008-10-30 | |
dc.identifier.citation | Amini, Majeed; Laird, Brian Bostian. (2008). "Crystal-melt interfacial free energy of binary hard spheres from capillary fluctuations." Physical Review B, 78(14):144112. http://dx.doi.org/10.1103/PhysRevB.78.144112 | |
dc.identifier.issn | 1098-0122 | |
dc.identifier.uri | http://hdl.handle.net/1808/16131 | |
dc.description | This is the publisher's version, also available electronically from http://journals.aps.org/prb/abstract/10.1103/PhysRevB.78.144112. | |
dc.description.abstract | Using molecular-dynamics simulation coupled with an analysis of equilibrium capillary fluctuations in interfacial position, we compute the magnitude and anisotropy of the interfacial free energy γ for a binary hard-sphere system with a diameter ratio α=0.9. This system, in which the fluid mixture coexists with a randomly substituted face-centered-cubic solid solution, is a useful reference model for alloys. Our results show that γ increases with increasing mole fraction of the smaller sized particle when temperature is held constant. However, after rescaling the results to fixed pressure and varying temperature, we find that γ decreases with increased alloying by the smaller particle (corresponding to lower temperatures). Thus, γ is seen to decrease with increasing concentration of the lower melting point solute, consistent with earlier simulations on Ni/Cu and Lennard-Jones mixtures. The anisotropy in γ is such that the inequality γ100>γ110>γ111 holds for all concentrations studied. Using the classification scheme of Haxhimali et al., [Nat. Mater. 5, 660 (2006)] we find that the anisotropy in γ is consistent with a predicted ⟨100⟩ primary dendrite growth direction. | |
dc.publisher | American Physical Society | |
dc.title | Crystal-melt interfacial free energy of binary hard spheres from capillary fluctuations | |
dc.type | Article | |
kusw.kuauthor | Amini, Majeed | |
kusw.kuauthor | Laird, Brian Bostian | |
kusw.kudepartment | Physics and Astronomy | |
kusw.kudepartment | Chemistry | |
dc.identifier.doi | 10.1103/PhysRevB.78.144112 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item does not meet KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess |