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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:2
UID:UW-Physics-Event-8165
DTSTART:20230214T160000Z
DTEND:20230215T000000Z
DTSTAMP:20260414T033337Z
LAST-MODIFIED:20230209T194859Z
LOCATION:5310 Chamberlin
SUMMARY:Discovering and Engineering Two-Dimensional Magnetism and Supe
 rconductivity\, R. G. Herb Condensed Matter Seminar\, Tiancheng Song\,
  Princeton
DESCRIPTION:Understanding and manipulating macroscopic quantum phenome
 na such as
\nsuperconductivity and magnetism are crucial for future qu
 antum science and
\ntechnology. Two-dimensional (2D) materials and the
 ir van der Waals (vdW)
\nheterostructures offer a promising platform t
 o achieve this goal due to their
\nexceptionally broad tunability. In 
 this talk\, I will highlight the potential of
\nsuch a platform throug
 h two outstanding examples: 2D magnetism and 2D
\nsuperconductivity. I
 n the first part\, I will talk about a series of emergent
\nphenomena 
 enabled by the vdW nature of 2D magnets\, including (1) giant
\ntunnel
 ing magnetoresistance enhanced by spin-filtering effects\; (2) control
  of
\ninterlayer magnetism by tuning layer stacking\; (3) novel moiré
  magnetism by
\ntwisting two layers of 2D magnets. In the second part\
 , I will introduce a new
\nprobe to detect superconducting fluctuation
 s down to millikelvin temperatures
\nbased on thermoelectric measureme
 nts of a monolayer nanoflake. I will discuss
\nsurprisingly unusual vo
 rtex Nernst signals\, which reveal an unconventional
\nsuperconducting
  quantum criticality in an electrically tunable 2D
\nsuperconductor. F
 inally\, I will conclude by highlighting unique opportunities
\nfor di
 scovering and engineering new quantum materials and electronic phases 
 in
\ntwo dimensions.
URL:https://www.physics.wisc.edu/events/?id=8165
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