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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-1887
DTSTART:20101021T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260422T092241Z
LAST-MODIFIED:20101006T182042Z
LOCATION:5310 Chamberlin
SUMMARY:Scotch Tape Method: Not just for Graphene\, R. G. Herb Condens
 ed Matter Seminar\, Ken Burch\, University of Toronto
DESCRIPTION:Recently mechanical exfoliation has received a great deal 
 attention (2010 Physics Nobel) for producing single atomic sheets of g
 raphene. However this method is incredibly flexible and has opened a n
 ew route to producing materials on the nanoscale.  Materials with Nano
 meter thickness are an appealing platform for devices as well as explo
 ring the roles of dimensionality\, disorder\, and free carrier density
  in complex materials. To this end we have produced exfoliated crystal
 s of Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub> and Bi<
 sub>2</sub>Se<sub>3</sub> on a variety of substrates. I will discuss u
 nique advantages of this technique as well as some of the challenges i
 t posses. Interestingly we have observed subtle differences in the Ram
 an spectra between the exfoliated and bulk crystals enabling noninvasi
 ve determination of thickness (Bi<sub>2</sub>Se<sub>3</sub>) and Dopin
 g level (Bi-2212).
URL:https://www.physics.wisc.edu/events/?id=1887
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