Condensed Matter Physics Seminar
2 p.m., Thursday, March 17, 2005
Room 1201, Physics Building
Non-fermi liquid behavior of the spin 3/2 Hubbard model near half filling
Stellan Östlund
(Chalmers University, Gothenburg, Sweden)
Abstract: Utilizing an exact canonical transformation that maps a
Mott insulator with even valence to a Fermi vacuum it is suggested that an
exotic non-fermi liquid state may appear when such an insulator is doped. In the
relatively simple case of a spin 3/2 Hubbard model at half filling considered
here, a singlet insulating phase acquires a superconducting order parameter
proportional to the number of holes that are added. Although this simple model
may have limited application, it illustrates an important principle that could
be applied to more generally to strongly interacting Mott insulators.
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Host: Einstein
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