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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-6476
DTSTART:20211015T203000Z
DTEND:20211015T213000Z
DTSTAMP:20260414T191914Z
LAST-MODIFIED:20210924T183227Z
LOCATION:2103 Chamberlin Hall
SUMMARY:Electronic Transport in Strain-Engineered Graphene \, Physics 
 Department Colloquium\, Nadya Mason\, UIUC
DESCRIPTION:There is wide interest in using strain-engineering to modi
 fy the physical properties of 2D materials\, for both basic science an
 d applications. Deformations of graphene\, for example\, can lead to t
 he opening of band gaps\, as well as the generation of pseudo-magnetic
  fields and novel electronic states. We demonstrate how controllable\,
  device-compatible strain patterns in graphene can be engineered by de
 positing graphene on corrugated substrates. We discuss several techniq
 ues for creating corrugated substrates\, focusing on periodic spherica
 l curvature patterns in the form of closely packed nanospheres. We sho
 w how the smaller nanospheres induce larger tensile strain in graphene
 \, and explain the microscopic mechanism of this. We also present expe
 rimental results demonstrating how a nearly periodic array of underlyi
 ng nanospheres creates a strain superlattice in graphene\, which exhib
 its mini-band conductance dips and pseudomagnetic field effects that d
 epend on the magnitude of induced strain. This control of the strain d
 egree of freedom provides a novel platform both for fundamental studie
 s of 2D electron correlations and for prospective applications in 2D e
 lectronic devices.
URL:https://www.physics.wisc.edu/events/?id=6476
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