Events at Physics

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Events During the Week of March 28th through April 4th, 2010

Monday, March 29th, 2010

Spring Break

Tuesday, March 30th, 2010

Spring Break

Wednesday, March 31st, 2010

Spring Break

Thursday, April 1st, 2010

Spring Break
R. G. Herb Condensed Matter Seminar
Electronic Orbital Currents and Polarization in Mott Insulators
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Cristian Batista, Los Alamos National Laboratory
Abstract: Mott insulators are one of the most important classes of materials in modern solid-state physics. I will show that geometrically frustrated Mott insulators can exhibit unexpected charge effects like spontaneous circular electric currents that result from certain (scalar) chiral spin orderings or non-uniform electronic charge distributions associated with a subclass of bond orderings. We will see how these phases can appear in simple Hubbard models. In addition, I will show how these low-energy spin states contribute comparably to the dielectric and magnetic response functions, leading to interesting phenomena such as dipole-active ESR transitions, rotation the electric field polarization, and magneto-electric effects.
Host: Natalia Perkins
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Friday, April 2nd, 2010

Spring Break
Physics Department Colloquium
No Colloquium--Spring Break