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BEGIN:VEVENT
DTSTAMP:20261016T140809Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20100325T140000Z
DTEND:20100325T150000Z
UID:event630@bu.edu
URL:http://physics.bu.edu/internal/events/show/630
SUMMARY:Destruction of Cuprate Superconductivity with Current: a Variationa
	l Study 
DESCRIPTION:Featuring Lilach Goren\, Weizmann Institute\n\nPart of the Cond
	ensed Matter Theory Seminar Series.\n\nAbstract:\nWe investigate the proper
	ties of cuprate superconductors subject to\napplied current\, using modifie
	d Gutzwiller projected d-wave BCS\nstates. The parent wave-functions includ
	e quasiparticle and quasihole\npockets\, of variationally determined size\,
	 generated by the current.\nThe pockets\, growing with increasing current\,
	 contribute to the\nreduction of the superfluid stiffness and its eventual 
	destruction. We\nidentify two different mechanisms which determine the crit
	ical\ncurrent: at high hole doping (x>0.15) it occurs when the pockets\ncom
	pletely destroy the gap\, in a BCS-like mechanism; in the underdoped\nregim
	e the mechanism is bosonic\, whereby the critical current is set\nby a maxi
	mal phase twist which destroys the superfluid stiffness with\npairing still
	 intact. This result is indicative of a pseudogapped\n'normal' state which 
	retains pairing correlations. The critical\ncurrent as a function of doping
	 displays a dome shape\, similar to Tc.\nWe predict unique signatures of th
	e current induced Fermi pockets that\ncan be seen in ARPES measurements.
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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