BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260921T152102Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20080522T173000Z
DTEND:20080522T183000Z
UID:event292@bu.edu
URL:http://physics.bu.edu/internal/events/show/292
SUMMARY:Quantum Fluctuations in two-dimensional superconductors
DESCRIPTION:Featuring Victor Galitski\, University of Maryland\n\nPart of t
	he Condensed Matter Theory Seminar Series.\n\nAbstract: In this talk\, I wi
	ll review recent theoretical and experimental results on quantum fluctuatio
	n effects in two-dimensional disordered superconductors. First\, I will dis
	cuss a quantum version of the Gaussian Aslamazov-Larkin theory in the vicin
	ity of the disorder-tuned and magnetic-field-tuned superconducting quantum 
	critical point (QCP). It will be shown that the result for the leading quan
	tum correction to conductivity may change sign at low temperature – a
	 counter-intuitive result\, which has been confirmed by experiment however.
	 I will also argue that the fluctuation diamagnetism and Nernst effect are 
	naturally  very large near the superconducting transition and the correspon
	ding parameters are expected to exceed the Fermi liquid values even in the 
	perturbative regime. A complete theory of Gaussian superconducting fluctuat
	ions on the Nernst effect will be discussed. Next\, I will talk about the r
	ecently developed microscopic non-perturbative theory of superconducting fl
	uctuations near the disorder-tuned QCP\, where one can get insight into the
	 behavior of interacting fluctuating Cooper pairs in the Ginzburg fluctuati
	on region. I will conclude by discussing the Griffiths effects of rare diso
	rder fluctuations\, which may smear out the quantum critical behavior.\n\nR
	efs: Victor Galitski\, Phys. Rev. Lett. 100\, 127001 (2008); Phys. Rev. B 7
	7\, 100502® (2008)
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
END:VCALENDAR