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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261019T223241Z
LAST-MODIFIED:20171127T161247Z
DTSTART:20171215T160000Z
DTEND:20171215T170000Z
UID:event1822@bu.edu
URL:http://physics.bu.edu/internal/events/show/1822
SUMMARY:"Properties of Topological semimetals: Chiral magnetic effect and i
	nstability under magnetic field"
DESCRIPTION:Featuring Xi Dai\, Hong Kong University of Science and Technolo
	gy\nHosted by: Wanzheng Hu\n\nPart of the Condensed Matter Theory Seminar S
	eries.\n\nIn the present talk\, I will introduce two important physical pro
	perties of topological semimetals. The first one is the chiral magnetic eff
	ect\, which is the direct consequence of the presence of Weyl points in the
	 band structures. I will introduce that the chiral magnetic effect can be d
	etected by its coupling to certain phonon modes\, which behave like pseudo 
	scalars under point group transformations. Such coupling can generate reson
	ance between the intrinsic plasmon oscillation and the corresponding phonon
	 modes\, leading to dramatic modification of the optical response by the ex
	ternal magnetic field. The second one is the instability of topological sem
	imetal phase under strong magnetic field. In Dirac semi-metal\, the quantum
	 limit can be easily reached under the magnetic field leading to two types 
	of phase instability caused by the high degeneracy of the topological zerot
	h Landau bands (LBs)\, namely the charge density wave (CDW) phase and polar
	ized nematic phase formed by exciton condensation.  We also propose that bo
	th the DC transport measurement and Raman scattering can be used to disting
	uish the above two phases.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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