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BEGIN:VEVENT
DTSTAMP:20260730T122008Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20100216T190000Z
DTEND:20100216T200000Z
UID:event607@bu.edu
URL:http://physics.bu.edu/internal/events/show/607
SUMMARY:Superconductivity and Conductivity of Hard Core Lattice Bosons 
DESCRIPTION:Featuring Assa Auerbach\, Technion \n\nPart of the Condensed Ma
	tter Theory Seminar Series.\n\nAbstract: Hard core  bosons (HCB)  near half
	 filling\, serve as a paradigm for strongly fluctuating superconductors wit
	h low superfluid density and lattice scale coherence length. The talk will 
	concentrate on 'unconventional' features of HCB near half filling. The cond
	uctivity (both DC and AC) fall in the category of a `bad metal' [1]. The te
	mperature dependent order parameter exhibits a non-BCS trapezoidal shape [2
	]. The  Hall conductivity changes sign abruptly about half filling\, in con
	trast to any continuum superfluid.  Precisely at half filling\, vortices ca
	rry local spin-half (v-spin) degeneracies [3]. The phenomenology of HCB res
	embles some of the unusual characteristics of the normal  state of cuprates
	. In  particular\, HCB yield a similar proportionality constant to the empi
	rical 'Homes law'  scaling.\n\n[1] Netanel H. Lindner \, Assa Auerbach\, ar
	Xiv:0910.4158\, Phys. Rev. B in press.\n[2] Alexander Mihlin and Assa Auerb
	ach\,  Phys. Rev. B 80\, 134521 (2009).\n[3] Netanel H. Lindner \, Assa Aue
	rbach and Daniel P. Arovas\, Phys. Rev. Lett. 101\, 070403 (2009).
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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