Condensed Matter Physics Seminar
2 p.m., Thursday, October 5 2006
Room 1201, Physics Building
Inverse Design of Surface-Based Nanostructures via Multiscale Modeling
Zhenyu Zhang
(Oak Ridge National Laboratory & University of Tennessee)
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) fabrication of ordered
magnetic atom wires on non-magnetic metal substrates; (b) quantum growth of
atomically flat superconducting metal overlayers on semiconductor 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 synergistic efforts between theory and
experiment, including in the last example the striking observation of magnetic
ordering temperatures well above 300 K.
-
Host: Einstein
Back to Condensed Matter Physics Seminar Home
Page