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TZID:Europe/Vienna
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DTSTART:20170326T030000
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DTSTART:20171029T020000
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BEGIN:VEVENT
DTSTAMP:20260428T030315Z
UID:58b4005b2744d756821343@ist.ac.at
DTSTART:20170519T133000
DTEND:20170519T143000
DESCRIPTION:Speaker: Attila Geresdi\nhosted by Georgios Katsaros\nAbstract:
  Narrow gap semiconductors\, such as InAs and InSb have recently become th
 e most studied platform of Majorana zero modes and novel superconducting q
 ubit architectures. The microscopic description of the superconducting pro
 ximity effect however requires the understanding of the Andreev bound stat
 e spectrum in these systems. Here we present our experimental work address
 ing the Andreev levels in Josephson junctions of InAs nanowires with alumi
 num epitaxial shells. In order to directly access the excited Andreev leve
 ls up to 90 GHz\, bounded by the gap of aluminum\, we utilize inelastic Co
 oper-pair tunneling in an on-chip coupled superconducting tunnel junction.
  \nWith this technique\, we show the presence of gate-tunable Andreev leve
 ls in a ballistic semiconductor channel for the first time\, and demonstra
 te how an external applied magnetic field influences the spectrum in the p
 resence of strong spin-orbit coupling\, relevant for parity-controlled inv
 estigations of Majorana bound states.
LOCATION:Meeting room 2nd floor / Lab Bldg West (I21.02.132)\, ISTA
ORGANIZER:sdanzing@ist.ac.at
SUMMARY:Attila Geresdi: Microwave spectra of Andreev levels in nanowire Jos
 ephson junctions
URL:https://talks-calendar.ista.ac.at/events/423
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