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SUMMARY:Oxide interface\; LaAlO3/SrTiO3\, Dr. Kiyoung Lee\, TFM - Dr. Kiyo
 ung Lee\, TFM
DTSTART:20121122T143000Z
DTEND:20121122T160000Z
UID:TALK41217@talks.cam.ac.uk
CONTACT:Kimberly Cole
DESCRIPTION:Since the first observation of high mobility electron gas at L
 aAlO3 (LAO) and SrTiO3 (STO) interface in 2004\, the research on complex o
 xide heterostructures have been fertile for its potential electronic appli
 cations. It has also been diverging to other physical phenomena to electri
 c field tunable superconductivity\, metal-insulator transition\, and coexi
 stence of superconductivity and ferromagnetism. In this talk\, I will intr
 oduce what we have recently observed in a LAO/STO heterostructure via pers
 istent photoconductivity effect following a brief overview of this researc
 h area. We are able to stablise the high mobility two dimensional HOLE gas
  at the surface in coexistence with an electron gas at the interface. A se
 ries of Shubnikov-de Haas oscillations in  various gate voltages allows to
  see the hole gas with a density of 3x10^11 cm^-2 and a mobility of 10\,00
 0 cm^2/Vs.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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