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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261017T181344Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20120201T140000Z
DTEND:20120201T150000Z
UID:event865@bu.edu
URL:http://physics.bu.edu/internal/events/show/865
SUMMARY:Examining the Interaction Between Phonons and Dirac Fermion Quasipa
	rticles on the Surface of the Topological Insulator Bi2Se3 via Helium Atom 
	Scattering
DESCRIPTION:Featuring Colin Howard\n\nPart of the Preliminary Oral Exam.\n\
	nExamining Committee: Michael El-Batanouny\, Claudio Chamon\, William Skocp
	ol\, Robert Carey\nAbstract:\nIn physics we commonly understand ordered pha
	ses of matter using Landau’s approach in which we identify the symmet
	ries that a particular phase breaks.  For example\, crystals break con
	tinuous translational symmetry as well as certain types of rotational symme
	try in real space. Similarly\, the field produced by a ferromagnet further 
	reduces crystal symmetry and also breaks time reversal invariance. However\
	, beginning in the early 1980s with the discovery of the integer quantum Ha
	ll effect\, a new type of order rooted in topology rather than symmetry beg
	an to emerge. Continuing on this fruitful path\, within the past five years
	 physicists have demonstrated that insulators with time reversal invariant 
	(TRI) Hamiltonians can be classified into two distinct topological groups a
	ccording to their topological quantum number\, Z2. Those with even Z2 are t
	rivial insulators while those with odd Z2 are said to be topological. 
	Unlike the trivial case\, topological insulators have robust\, gapless\, he
	lical
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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