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Thursday, January 12, 2012
2:00 PM - 3:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Postdoc Seminar

Fractionalization in spontaneous integer quantum Hall systems

Armin Ramanisian
T-4 and CNLS

Using Kondo lattice model as an example, we show that systems that exhibit spontaneous integer quantum Hall effect can have fractionalized electronic excitations with anyonic exchange statistics. The fractionalized excitations are bound to the cores of topologically stable vortices in the magnetic order parameter. For highly symmetric states, the vortex charge is half-odd integer, although other, generally irrational, charges are possible for less symmetric states.

Host: Kipton Barros, T-4 and CNLS