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Research Abstracts Online
January - December 2011

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University of Minnesota Twin Cities
College of Science and Engineering
School of Physics and Astronomy

PI: Oriol T. Valls, Fellow

Numerical Studies on Superconducting Proximity Effects and on Dynamic Phenomena in Supersolids

These researchers are continuing their program in the following areas: proximity effects in superconductor-ferromagnet heterostructures, including both those involving conventional metals and those including exotic two-dimensional material such as graphene; superfluid hydrodynamics, dynamics of dislocations, and related phenomena in supersolids. In the first area, the researchers study the behavior of high-quality multilayer and superlattice nanostructures comprised of superconducting and non-superconducting (particularly ferromagnetic) materials, using numerical methods they have developed to solve the exact microscopic equations for such systems. They plan to include graphene electrodes in these studies during 2012. In the second research are, the researchers plan to numerically study the hydrodynamics of superfluids in confined geometries with its implications for “supersolid” phenomena, and, using numerical techniques, the dynamics of dislocations and grain boundaries as it relates to supersolid phenomena in solid 4He via the proposed coupling between the bosonic superfluid field and the dislocations.

Group Members

Mohammad Alidoust, Graduate Student
Paul Barsic, Arete Associates, Arlington, Virginia
Brian T. Benton, Undergraduate Student
Matthew S. Bryan, Undergraduate Student
Cole M. Grasse, Undergraduate Student
Klaus Halterman, China Lake Research Center, China Lake, California
Chien-Te Wu, Graduate Student