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DTSTART:20220327T030000
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DTSTAMP:20260424T143514Z
UID:627254625e1fe342337494@ist.ac.at
DTSTART:20220712T110000
DTEND:20220712T120000
DESCRIPTION:Speaker: Thibault Charpentier\nhosted by Andrew Higginbotham\nA
 bstract: Superinductances made of disordered superconductors provide a sim
 ple\, easy to fabricate\, alternative to Josephson junctions chains. To ob
 tain such a large inductance one has to significantly increase the resista
 nce of the material and approach the insulating state terminating supercon
 ductivity where some unusual physics takes place. In this talk we discuss 
 how strong disorder deeply modifies the superconducting state of amorphous
  indium oxide (a:InO) films. By measuring the kinetic inductance of superc
 onducting a:InO resonators\, we show that the transition to superconductiv
 ity is bosonic with a critical temperature ruled by superconducting phase 
 fluctuations.Upon reaching the critical disorder terminating superconducti
 vity\, the superfluid stiffness remains surprisingly finite at the transit
 ion to insulation. This indicates an unexpected first-order nature of the 
 disorder-driven quantum phase transition to insulator.Our strongly disorde
 red superconducting resonators act as superinductance with wave impedance 
 greater than the resistance quantum\, providing a new alternative for high
  impedance devices.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Thibault Charpentier: First-order quantum breakdown of a bosonic di
 sordered superconductor
URL:https://talks-calendar.ista.ac.at/events/3753
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