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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-5153
DTSTART:20190822T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T195549Z
LAST-MODIFIED:20190819T173853Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Engineering Superconductivity in Semiconductor Nanowires for Q
 uantum Device Applications\, R. G. Herb Condensed Matter Seminar\, Ste
 phen Gill
DESCRIPTION:Semiconductor nanowires such as InAs and InSb provide a no
 vel basis for low dimensional quantum devices. Following proposals to 
 engineer Majorana bound states in these materials1\,2\, non-Abelian an
 yons relevant for topological quantum computing\, evidence3 for such b
 ound states was reported in highly disordered semiconductor-supercondu
 ctor devices. However\, the level of disorder did not preclude trivial
  origins to these observations and has motivated significant advances 
 in semiconductor-superconductor devices in order to realize robust Maj
 orana devices. In this talk\, I will discuss how to engineer supercond
 uctivity in InSb nanowire devices and realize state of the art quantum
  transport features in hybrid semiconductor-superconductor devices. In
  particular\, I will explain the development of epitaxial semiconducto
 r-superconductor interfaces\, which ensure uniform superconducting cou
 pling to the nanowire and enable ballistic superconducting quantum wir
 es to be realized in InSb. Lastly\, I will discuss experiments in prog
 ress to study the transition from Andreev to Majorana bound states in 
 ballistic InSb nanowire devices. 
\n
\nReferences:
\n1. R. M. Lutchyn\
 , J. D. Sau\, and S. Das Sarma\, Phys. Rev. Lett. 105\, 077001 (2010).
 
\n2. Y. Oreg\, G. Refael\, and F. von Oppen\, Phys. Rev. Lett. 105\, 
 177002 (2010).
\n3. V. Mourik\, K. Zuo\, S. M. Frolov\, S. R. Plissard
 \, E. P. A. M. Bakkers\, and L. P. Kouwenhoven\, Science 336\, 6084 (2
 012). 
URL:https://www.physics.wisc.edu/events/?id=5153
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