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Nonequilibrium Interface and Surface Dynamics 2007
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Inverse Design of Metallic and Magnetic
Nanostructures via Multiscale Modeling
CSIC Building (#406),
Seminar Room 4122.
Directions: home.cscamm.umd.edu/directions
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Inverse Design of Metallic and Magnetic
Nanostructures via Multiscale Modeling
Professor
Zhenyu Zhang
Oak Ridge National Laboratory
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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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