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DTSTART:20180325T030000
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DTSTART:20171029T020000
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DTSTAMP:20260406T074301Z
UID:5a4b57daa9b99563449278@ist.ac.at
DTSTART:20180125T120000
DTEND:20180125T130000
DESCRIPTION:Speaker: Fabrizio Nichele\nhosted by Johannes Fink\nAbstract: T
 here is growing interest in material systems that both support Majorana ze
 ro modes (MZMs)\, relevant for quantum computing\, and can be fabricated i
 nto complex and scalable geometries. So far\, MZMs have been tentatively i
 dentified in individual InSb or InAs nanowires with induced superconductiv
 ity. Future tests of non-Abelian statistics will likely involve braiding o
 r interferometric measurement\, requiring branched or looped geometries\, 
 challenging to realize using individual nanowires. I will present investig
 ations of hybrid superconductor/semiconductor devices based on a planar In
 As heterostructure strongly coupled to a thin layer of epitaxial Al. By to
 p-down lithography\, we define one-dimensional wires characterized by a ha
 rd superconducting gap\, ballistic tunneling probes and in-plane critical 
 fields up to 3 T. In the presence of an in-plane magnetic field\, zero ene
 rgy states robust in field emerge and show a behavior consistent with theo
 ry for MZMs\, including low temperature saturation at the conductance quan
 tum.I will conclude presenting recent progresses on advanced devices hosti
 ng MZMs and I will discuss ideas for future improvements in material quali
 ty and device geometry.
LOCATION:Mondi Seminar Room 3\, Central Building\, ISTA
ORGANIZER:pdelreal@ist.ac.at
SUMMARY:Fabrizio Nichele: Majorana zero modes in InAs/Al two-dimensional he
 terostructures
URL:https://talks-calendar.ista.ac.at/events/1035
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