The range and nature of effective interactions in hard-sphere solids. Issue 9 (2nd February 2016)

• Record Type: Journal Article
• Authors: Schindler, Michael; Maggs, A. C.
• Is Part Of: Soft matter. Volume 12:Issue 9(2016)
• Page Start: 2612
• Page End: 2622
• Publication Date: 2016-02-02
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c6sm00032k
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : In thermal colloidal systems, entropy contributes in a non-central an nonlocal way to the effective interactions that can be measured using the correlation matrix of particle displacements. Abstract : Colloidal systems observed in video microscopy are often analysed using the displacements correlation matrix of particle positions. In non-thermal systems, the inverse of this matrix can be interpreted as a pair-interaction potential between particles. If the system is thermally agitated, however, only an effective interaction is accessible from the correlation matrix. We show how this effective interaction differs from the non-thermal case by comparing with high-statistics numerical data from hard-sphere crystals.