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This Week at Physics

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Event Number 2105

  Tuesday, March 15th, 2011

R. G. Herb Condensed Matter Seminar
Quantum wire dots and quantum posts
Time: 4:00 pm
Place: 5310 Chamberlin
Speaker: Craig Pryor, University of Iowa
Abstract: The theoretical understanding of the electronic and optical properties of strained semiconductor nanostructures, such as quantum dots, has been quite successful, in spite of the uncertainties in the composition and geometry of the structures, and the material properties. As experimentalists have developed more exotic structures, such as nanowire quantum dots and quantum posts, additional complications arise. For example, nanowires typically have a different crystal structure from the bulk materials, and large quantum posts can confine 5 or 6 electrons. I will discuss the progress in understanding of these structures, including calculations of strain and material segregation effects, electron-electron interactions, and exciton lifetimes.
Host: Robert Joynt
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