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Research Activities > Programs > Nonequilibrium Interface and Surface Dynamics 2007

Inverse Design of Metallic and Magnetic Nanostructures via Multiscale Modeling

CSIC Building (#406), Seminar Room 4122.
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Inverse Design of Metallic and Magnetic Nanostructures via Multiscale Modeling

Professor Zhenyu Zhang

Oak Ridge National Laboratory

Abstract:   Multiscale modeling is gaining an increasingly important role in guiding the fabrication of artificially structured nanomaterials with atomic-scale precision and desirable physical properties. In this talk, a few recent examples will be presented to illustrate its predictive power in modern materials research. The modeling approaches range from electronic-scale calculations based on first principles to mesoscopic-scale continuum elasticity theory. Specific physical systems considered include: (a) nanoclystal formation via true upward adatom migration and faceting; (b) fabrication of ordered magnetic atom wires on non-magnetic metal substrates; and (c) optimal dopant control in dilute magnetic semiconductors via "Subsurfactant Epitaxy". Emphasis will be made on the substantially improved structure-property relationships achieved through such synergetic efforts between theory and experiment, including in the last example the striking observation of magnetic ordering temperatures well above 300 K.
*Supported by DOE & NSF.

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