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DTSTART:20230326T030000
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BEGIN:VEVENT
DTSTAMP:20260426T103451Z
UID:64f039dbc013c881626161@ist.ac.at
DTSTART:20231023T090000
DTEND:20231023T100000
DESCRIPTION:Speaker: Thomas Scaffidi\nhosted by Maksym Serbyn\nAbstract: Wh
 at is the ultimate limit of conductance of a metallic device of lateral si
 ze W? In the ballistic limit\, the answer is the Landauer-Sharvin conducta
 nce\, which is associated with an abrupt reduction of the number of conduc
 ting channels when going from the contacts to the device. However\, the ba
 llistic limit is not always the best-case scenario\, since adding strong e
 lectron-electron scattering can take electrons to a viscous regime of tran
 sport for which "super-ballistic" flows were recently studied. In this tal
 k\, we will show that by a proper choice of geometry which resembles a "wo
 rmhole"\, it is possible to spread the Landauer-Sharvin resistance through
 out the bulk of the system\, allowing its complete elimination by electron
  hydrodynamics. This effect arises due to the interplay between geometry a
 nd strong electron-electron scattering\, which allows for a net transfer o
 f carriers from reflected to transmitted channels. Finally\, we will discu
 ss a recent experiment in a Corbino geometry which realizes one half of th
 is "wormhole" geometry.
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:Darina.Boukalova@ist.ac.at
SUMMARY:Thomas Scaffidi: How electron hydrodynamics can eliminate the Landa
 uer-Sharvin resistance
URL:https://talks-calendar.ista.ac.at/events/4389
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