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SUMMARY:IMX Seminar Series - Building a materials platform to support topo
 logical quantum computing
DTSTART:20200309T131500
DTEND:20200309T141500
DTSTAMP:20260510T202506Z
UID:1e77f6e13297a90da75d1510f47504a11ea6f6df3ae4578cd0702fac
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Philippe Caroff\, Microsoft Q-Lab\, The Netherlands\nPhilip
 pe Caroff et al.\, Microsoft Quantum Lab Delft\, The Netherlands.  Nanos
 cale hybrid III-V semiconductor/superconductor heterostructures are promis
 ing for advanced quantum transport physics\, in particular as hosts to Maj
 orana quasiparticles. Most work in the field has relied on Vapor-Liquid-So
 lid grown InAs or InSb nanowires\, which require one-by-one manual placeme
 nt to enable device fabrication\, and are therefore inadequate for scaling
 -up. Selective-area epitaxy is promising as a scalable materials platform 
 combining advantages of both VLS nanowires and planar 2DEG (along with som
 e of their challenges)\, and will be the central topic of this presentatio
 n. We’ll start with a broad context of quantum computing and the origina
 l path presented by topological quantum computing\, finishing with the lis
 t of key ingredients theory as well as fabrication requests from the mater
 ials platform. The chosen selective area epitaxy technique will be introdu
 ced from historic early steps using favorable metalorganic vapour phase or
  chemical beam epitaxy (MOVPE/CBE) to most recent renewed interests in the
  challenging case of atomic or molecular species “precursors” in the m
 olecular beam epitaxy technique (MBE). An in-situ methodology to map the
  parameter space for selectivity will be introduced. We’ll then review g
 rowth and architecture rules for satisfactory in-plane nanowire networks b
 ased on simple crystallographic\, nucleation kinetics and polarity argumen
 ts. Finally\, we’ll demonstrate promises of the high spin-orbit coupling
  InSb/Al SAG system via structural and transport characterization and disc
 uss the future challenges for a scalable quantum materials platform.\nBio:
  Philippe Caroff obtained his Ph.D. degree in physics in 2005 from the Ins
 titut National des Sciences Appliqués (INSA Engineering School) in Rennes
  (France) on growth of III-V quantum dots for telecom applications\, and w
 as a postdoctoral scholar in Lund University from 2006 to 2008 on III-V na
 nowires. He became a tenured CNRS Research Scientist in 2008 and worked in
  Lille (IEMN)\, France\, for four years on MBE growth of III-V nanowires\,
  before joining the Australian National University (ANU)\, Department of E
 lectronic Materials Engineering\, in 2013 as an independently funded Austr
 alian Research Council Future Fellow. He joined Cardiff University and the
  newly created Institute for Compound Semiconductors (ICS)\, UK\, in Decem
 ber 2016\, to serve as Sêr Cymru Senior Research Fellow and MBE lab facil
 ity manager. Since December 2017\, he works at Microsoft Quantum Lab Delft
 \, The Netherlands. The focus of his team of material scientists is on gro
 wth of hybrid III-V/superconductor nano-heterostructures to support progre
 ss on topological quantum computing.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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