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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261026T030953Z
LAST-MODIFIED:20190926T210812Z
DTSTART:20190927T150000Z
DTEND:20190927T160000Z
UID:event2192@bu.edu
URL:http://physics.bu.edu/internal/events/show/2192
SUMMARY:Spectroscopy of spinons in Coulomb quantum spin liquids
DESCRIPTION:Featuring Siddhardh Morampudi\, Boston University\, Physics Dep
	artment\nHosted by: Christopher Laumann\n\nPart of the Biophysics/Condensed
	 Matter Seminar Series.\n\nQuantum spin liquids are phases of matter with f
	ractionalized excitations and emergent gauge fields. However\, there is a l
	ack of concrete experimental signatures for these exotic features. We compu
	te the low-temperature dynamics of fractionalized spinon excitations in the
	 prominent class of U(1) Coulomb spin liquids such as quantum spin ice. The
	 emergent photon is gapless and hence has a dramatic effect on the threshol
	d cross-section of spinons\, changing the weak turn-on expected from the de
	nsity of states to an abrupt onset reflecting the emergent fine structure c
	onstant. The photon is also extremely slow in all existing models and mater
	ials. This leads to a suppression of the intensity at finite momentum and e
	mission of Cerenkov radiation beyond a critical momentum. These features ar
	e broadly consistent with recent numerical and experimental results.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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