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BEGIN:VEVENT
DTSTAMP:20260717T001635Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20100504T150000Z
DTEND:20100504T160000Z
UID:event643@bu.edu
URL:http://physics.bu.edu/internal/events/show/643
SUMMARY:Flexural phonon limited mobility in doped suspended graphene.
DESCRIPTION:Featuring Eduardo V. Castro \, Instituto de Ciencia de Material
	es de Madrid\, Spain Centro de Fisica do Porto\, Portugal\n\nPart of the Co
	ndensed Matter Theory Seminar Series.\n\nABSTRACT:\n\nThe two-dimensional a
	llotrope of carbon --; graphene --; has been\nattracting considerable atten
	tion since the first flake was isolated\nfive years ago. The enormous inter
	est is driven equally by the\nunconventional low-energy behavior (massless 
	Dirac quasiparticles) and\npotential technological applications. Regarding 
	the latter\, the giant\nintrinsic carrier mobility observed in suspended gr
	aphene (free of\nsubstrate induced limitations) is certainly an asset. The 
	reported big\nnumbers\, however\, show up only at low temperatures; at room
	\ntemperature mobility falls into the values reported for non-suspended\nsa
	mples. In this talk I will explore the effect of flexural phonons --;\nout-
	of-plane vibrations of the graphene membrane --; on the\nresistivity's temp
	erature dependence of doped suspended graphene. It\nwill be shown that flex
	ural acoustic phonons give the major scattering\ncontribution at room tempe
	rature\, and indeed limit mobility to values\nknown for samples on substrat
	e. A work around based on the possibility\nof inducing strain to the graphe
	ne membrane will be discussed.
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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