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BEGIN:VEVENT
DTSTAMP:20260826T072207Z
LAST-MODIFIED:20170201T162009Z
DTSTART:20170206T193000Z
DTEND:20170206T203000Z
UID:event1718@bu.edu
URL:http://physics.bu.edu/internal/events/show/1718
SUMMARY:Real-space imaging of a nematic quantum liquid
DESCRIPTION:Featuring Ben Feldman\, Princeton University\n\nPart of the Bio
	physics/Condensed Matter Seminar Series.\n\nThe wave functions of electroni
	c states in solids typically respect the symmetries of the host material. H
	owever\, interactions among electrons can give rise to a variety of exotic 
	correlated phases characterized by broken symmetry. An intriguing example i
	s the formation of electron fluids with wave functions that spontaneously b
	reak the symmetry of the underlying crystal lattice. These phases are quant
	um analogues of classical liquid crystals and have been studied in recent y
	ears across disparate platforms ranging from high-temperature superconducto
	rs to two-dimensional electron systems. In this talk\, I will describe scan
	ning tunneling microscope measurements that allow us to visualize such a qu
	antum liquid in real space. We examine the quantum Hall states that arise a
	t high magnetic field from anisotropic Fermi pockets on the surface of bism
	uth. Our measurements reveal that a combination of strain and exchange inte
	ractions lift the Landau level degeneracy and produce valley-polarized stat
	es. We image the resulting anisotropic wave functions and find that they ha
	ve a different orientation for each broken-symmetry state\, providing a dir
	ect spatial signature of a nematic electronic phase.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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