BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/Vienna
BEGIN:DAYLIGHT
DTSTART:20210328T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20211031T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260403T220805Z
UID:6163fa5e883a4062468795@ist.ac.at
DTSTART:20211021T144500
DTEND:20211021T154500
DESCRIPTION:Speaker: Praveen Sriram\nhosted by Georgios Katsaros\nAbstract:
  Hybrid metal-semiconductor two-dimensional systems are an attractive plat
 form for exploring correlated electron-electron interactions. Flexible nan
 opatterning allows design of structures to emulate particular Hamiltonians
  with electrostatically tunable parameters. Frdric Pierre recently demonst
 rated a quantum phase transition based on a multichannel charge Kondo effe
 ct[1\,2] in a GaAs heterostructure with an annealed metal island. With the
  goal of scaling up towards simulating coherent Kondo lattice interactions
 \, a two-site charge Kondo circuit in GaAs was developed in our group\, re
 alizing a unique inter-island interaction and new quantum phase transition
 [3]. InAs may offer significant advantages: pinning of the surface Fermi l
 evel in the conduction band allows for direct ohmic contact to surface met
 als. Small metallic islands with large charging energies will enable build
 ing on earlier charge Kondo work without requiring as low electron tempera
 tures. Working towards developing an InAs-based quantum simulation platfor
 m of non-Fermi liquid phases\, we have been building on progress made in t
 he growth of high-mobility InAs quantum well heterostructures[4]. I will t
 alk about our recent work on gate-defined quantum point contacts (QPCs) wi
 th large g-factor anisotropy and subband spacings\, and highly transparent
  interfaces between submicron metallic islands and quantum Hall edge state
 s[5].  References 1.Z. Iftikhar\, et al.\, Nature 526\, 233236 (2015) 2.Z.
  Iftikhar\, et al.\, Science 360\, 13151320 (2018)3.W. Pouse\, et al. arXi
 v:2108.12691 (2021) 4.A. T. Hatke\, et al.\, Applied Physics Letters 111\,
  142106 (2017) 5.C.L. Hsueh\, P. Sriram\, et al. (under preparation)
LOCATION:Foyer seminar room Ground floor / Office Bldg West (I21.EG.128)\, 
 ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Praveen Sriram: Quantum point contacts and transparent submicron oh
 mic islands in InAs\, towards quantum simulation of non-Fermi liquid p.
URL:https://talks-calendar.ista.ac.at/events/3332
END:VEVENT
END:VCALENDAR