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BEGIN:VEVENT
DTSTAMP:20261014T063538Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20090930T174500Z
DTEND:20090930T184500Z
UID:event512@bu.edu
URL:http://physics.bu.edu/internal/events/show/512
SUMMARY:Geometrically frustrated magnets
DESCRIPTION:Featuring Arnab Sen\, Boston University\n\nPart of the Condense
	d Matter Theory Seminar Series.\n\nAbstract:  Well-formed magnetic moments 
	(`spins') in insulators often display dominant short-range exchange interac
	tions\, which result in sharply defined transitions from high-temperature p
	aramagnetic behaviour to low temperature magnetic order the nature of which
	 can usually be understood in terms of the unique minimum of the classical 
	exchange energy. However\, in some cases\, the leading exchange interaction
	s compete with each other due to the geometry of the lattice. Such geometri
	cally frustrated systems often have many local minima in their classical en
	ergy landscape\, or even a macroscopic number of inequivalent classical gro
	und states\, which leads to very different physics from unfrustrated magnet
	s.\n\nIn this talk\, I will start by explaining some general features about
	 geometrically frustrated magnets\, and then go on to describe our recent w
	ork on  $S>3/2$ spin systems with easy-axis anisotropy on the kagome and tr
	iangular lattices (two well known lattices where many experimental realizat
	ions of frustrated magnets exist) where quantum fluctuations lead to intere
	sting low temperature physics.
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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