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BEGIN:VEVENT
DTSTAMP:20261027T202702Z
LAST-MODIFIED:20170210T212455Z
DTSTART:20170213T203000Z
DTEND:20170213T213000Z
UID:event1725@bu.edu
URL:http://physics.bu.edu/internal/events/show/1725
SUMMARY:Non-equilibrium dynamics of a frustrated Mott insulator
DESCRIPTION:Featuring Zhanybek Alpichshev\, MIT\n\nPart of the Biophysics/C
	ondensed Matter Seminar Series.\n\nWhat happens to electrons when both the 
	spin orbit coupling and inter-particle Coulomb repulsion are very strong? W
	hile SOC alone can change the topology of the single particle insulating st
	ate\, even short range on-site repulsion by itself can give rise to a Mott 
	insulator - one of the most mysterious and thought provoking phases in soli
	d state physics. In this seminar I will talk about the behaviour of quasipa
	rticles in a frustrated Mott insulator in the presence of strong spin-orbit
	 coupling. Using ultrafast optical spectroscopy to study Na2IrO3 we found t
	hat the low energy properties of non-equilibrium charged quasiparticles are
	 almost entirely determined by their interaction with the magnetic backgrou
	nd. We observe that the behaviour of photo-doped electrons and holes is dra
	stically different in the magnetically ordered and disordered phases. While
	 in the ordered phase the spin correlations just renormalize the effective 
	mass of the quasiparticles\, in the latter they give rise to an effective a
	ttraction between charged excitations which grows with distance causing the
	m to become trapped within a bound state in a far going analogy with quark 
	confinement inside hadrons.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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