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You searched on: Author: eric cockayne

Displaying records 21 to 30 of 53 records.
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21. First Principles Based Simulations of Relaxor Ferroelectrics
Published: 2/1/2006
Authors: Benjamin P Burton, Eric J Cockayne, Silvia Tinte, U V Waghmare
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854182

22. Wake Fields in the Electron Gas Including Transverse Response
Published: 1/19/2006
Authors: Eric J Cockayne, Zachary H Levine
Abstract: Relativistic electrons have transverse electric fields comparable in magnitude to the longitudinal fields. We determine the relative effects of transverse and longitudinal fields of a moving point charge on the dielectric response of a uniform elect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850908

23. First Principles Based Simulations of Relaxor Ferroelectrics
Published: 1/16/2006
Authors: Benjamin P Burton, Eric J Cockayne, Silvia Tinte, U Waghmare
Abstract: The phenomenology of Pb(B,B$ {\prime}$)O$_{3}$, perovskite based relaxor ferroelectrics is reviewed, with emphasis on the relationship between chemical short-range order and the formation of polar nanoregions in the temperature range between the free ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850911

24. Generation of Lattice Wannier Functions via Maximum Localization
Published: 3/1/2005
Author: Eric J Cockayne
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854239

25. Generation of Lattice Wannier Functions via Maximum Localization
Published: 1/20/2005
Author: Eric J Cockayne
Abstract: A method is presented for generating approximate lattice Wannier functions (LWF) for lattice dynamics problems, using the dynamical matrix for a supercell as input. The lattice Wannier functions fit selected phonon frequencies and eigenvectors exact ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850831

26. Lattice Dynamics in PbMg1/3Nb2/3O3
Published: 10/1/2004
Authors: S A Prosandeev, Eric J Cockayne, Benjamin P Burton, S Kamba, J Petzelt, Yu Yuzyuk, R S Katiyar, S B Vakhrushev
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850815

27. Review of Modeling of Clays and Mineral Surfaces
Published: 9/1/2004
Author: Eric J Cockayne
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854247

28. Dipole Moment of a Pb-O Vacancy Pair in PbTiO^d3^
Published: 4/1/2004
Authors: Eric J Cockayne, Benjamin P Burton
Abstract: The polarization of a nearest-neighbor (nn) Pb-O vacancy pair in PbTiO3 is calculated, using the modern theory of polarization, implemented in the density functional theory ultrasoft pseudopotential formalism. The dipole moment per divacancy is about ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850779

29. Molecular Modeling of Clays and Mineral Surfaces [Book Review]
Published: 1/21/2004
Author: Eric J Cockayne
Abstract: Molecular Modeling of Clays and Mineral Surface for REVIEW
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850841

30. First-Principles Calculations of the Dielectric Properties of Perovskite-Type Materials
Published: 11/1/2003
Author: Eric J Cockayne
Abstract: We compare first-principles (FP) calculations of the ionic effective charges, phonon frequencies, and static dielectric permittivities k^ds^ of several perovskite-type materials. Transition metal ions have anomalously large effective charges, though ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850677



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