Publikation: Harmonic lattice behavior of two-dimensional colloidal crystals
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2004
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Physical Review Letters. 2004, 92(21). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.92.215504
Zusammenfassung
Using positional data from videomicroscopy and applying the equipartition theorem for harmonic Hamiltonians, we determine the wave-vector-dependent normal mode spring constants of a two-dimensional colloidal model crystal and compare the measured band structure to predictions of the harmonic lattice theory. We find good agreement for both the transversal and the longitudinal modes. For q→0, the measured spring constants are consistent with the elastic moduli of the crystal.
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530 Physik
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Structure of specific crystalline solids, Colloids
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KEIM, Peter, Georg MARET, Uli HERZ, Hans Hennig VON GRÜNBERG, 2004. Harmonic lattice behavior of two-dimensional colloidal crystals. In: Physical Review Letters. 2004, 92(21). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.92.215504BibTex
@article{Keim2004Harmo-17263,
year={2004},
doi={10.1103/PhysRevLett.92.215504},
title={Harmonic lattice behavior of two-dimensional colloidal crystals},
number={21},
volume={92},
issn={0031-9007},
journal={Physical Review Letters},
author={Keim, Peter and Maret, Georg and Herz, Uli and von Grünberg, Hans Hennig}
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<dcterms:abstract xml:lang="eng">Using positional data from videomicroscopy and applying the equipartition theorem for harmonic Hamiltonians, we determine the wave-vector-dependent normal mode spring constants of a two-dimensional colloidal model crystal and compare the measured band structure to predictions of the harmonic lattice theory. We find good agreement for both the transversal and the longitudinal modes. For q→0, the measured spring constants are consistent with the elastic moduli of the crystal.</dcterms:abstract>
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