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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260907T021057Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20081003T160000Z
DTEND:20081003T170000Z
UID:event314@bu.edu
URL:http://physics.bu.edu/internal/events/show/314
SUMMARY:Critical Fermi surfaces and non-fermi liquid metals 
DESCRIPTION:Featuring Senthil Todadri\, MIT\n\nPart of the Biophysics/Conde
	nsed Matter Seminar Series.\n\nAbstract: At certain quantum critical points
	 in metals an entire Fermi surface may disappear. A crucial question is the
	 nature of the electronic excitations at the critical point. Here we provid
	e arguments showing that at such quantum critical points the Fermi surface 
	remains sharply defined even though the Landau quasiparticle is absent. The
	 presence of such a critical Fermi surface has a number of consequences for
	 the universal phenomena near the quantum critical point which are discusse
	d. Scaling hypotheses appropriate to a critical fermi surface are proposed.
	 Experiments on heavy fermion critical points\, and in the normal state of 
	the cuprates are examined from this perspective. A theory of a continuous M
	ott transition in two dimensions is described. The Mott critical point is e
	xplicitly shown to possess a critical Fermi surface. Several interesting ph
	enomena near the Mott transition are found. Implications for experiments in
	 the organics are described.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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