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BEGIN:VEVENT
DTSTAMP:20260626T111631Z
DTSTART;VALUE=DATE-TIME:20160302T160000
DTEND;VALUE=DATE-TIME:20160302T180000
SUMMARY:Charles Smith (Cavendish Lab) - Low temperature scanned gate imag
 ing of quantum phenomena in nano-devices
TZID:Europe/London
UID:20160302-094d43f55084f6d001509264e64d6ad6@warwick.ac.uk
CREATED:20151023T015137Z
DESCRIPTION:Semiconductor Physics group\, Cavendish Laboratory\, J. J. Th
 omson Avenue\, Cambridge\, CB3 OHE Scanned gate techniques allow the spa
 tial variation of physical phenomena to be imaged at low temperatures. T
 he technique uses a conducting scanning probe tip with a voltage applied
  to it as a local gate to change the transport through an underlying dev
 ice. Images are created where the contrast comes from a change in the tr
 ansport though the device as a function of tip position. I will introduc
 e the background work in this field\, which was developed on IIIV hetero
 structure devices\, and then move on to discuss recent research on imagi
 ng graphene devices. Recent work imaging how single and bi-layer graphen
 e on silicon carbide alters the quantum Hall effect will be discussed as
  well as more recent work on imaging of magnetically focussed beams of e
 lectrons in high mobility graphene on boron nitride\, and the effects of
  doping and disorder on transport in graphene nano-devices. Imaging ball
 istic carrier trajectories in graphene using scanning gate microscopy Se
 i Morikawa\, Ziwei Dou\, Shu-Wei Wang\, Charles G Smith\, Kenji Watanabe
 \, Takashi Taniguchi\, Satoru Masubuchi\, Tomoki Machida\, Malcolm R Con
 nolly\, Applied Physics Letters 107 (24)\, 243102. (2015) Quantum Hall e
 ffect and quantum point contact in bilayer-patched epitaxial graphene Ca
 ssandra Chua\, Malcolm Connolly\, Arseniy Lartsev\, Tom Yager\, Samuel L
 ara-Avila\, Sergey Kubatkin\, Sergey Kopylov\, Vladimir Fal’ko\, Rositza
  Yakimova\, Ruth Pearce\, TJBM Janssen\, Alexander Tzalenchuk\, Charles 
 G Smith. Nano letters 14 (6)\, 3369-3373. (2014)
LOCATION:PLT
CATEGORIES:Departmental Colloquium
LAST-MODIFIED:20160224T170606Z
ORGANIZER;CN=Valery Nakariakov:
END:VEVENT
END:VCALENDAR