HIgh-Mobility Electron Gas at Polar Oxide Heterointerfaces
Presented by Dr Akira Ohtomo, Institute for Materials Research, Tohoku University
Tuesday 17 June 2008 at 2pm
University College London in the Harrie Massey Lecture Theatre
followed by a reception with light refreshments
Abstract
Atomic-scale control of oxide heteroepitaxy is of growing importance from the viewpoints of both fundamental physics and device applications. Many intriguing physical phenomena such as high-Tc superconductivity, ferromagnetism, ferroelectricity and thermoelectricity occur in naturally layered structures of transition metal oxides, giving rise to emergent interest in “epitaxial” design of new compounds based upon the atomic-scale layer-by-layer growth of artificial superlattices. We present two complemental studies on magnetotransport properties of high-mobility electrons at polar oxide heterointerfaces.
These results have implications for all oxide heterointerfaces, including magnetic tunnel junctions, Josephson junctions, oxides on semiconductors, etc. In particular, the high mobilities achieved present the possibility to combine the world of oxides (superconductors, multiferroics, colossal magnestoresistance) with the world of semiconductor heterostructures, including quantum Hall physics. This work is also a demonstration of the power of the field of nanoscience to create new physical phenomenon.
Profile
Dr Ohtomo received his PhD in Materials Science and Engineering in March 2000 at the Tokyo Institute of Technology. He was a Postdoctoral member of Technical staff at Bell Laboratories, Lucent Technologies (2000 –2002) and is now a visiting researcher at the National Institute for Materials Science (NIMS), Researcher at the Japan Science and Technology Agency (JST) and a research Associate at the Institute for Materials Research (IMR). Dr Ohtomohas been recognized through multiple awards from Young Scientist in 1994 through to this year’s achievement.
Biography
2000 –2002: Postdoctoral Member of Technical Staff, Bell Laboratories
2002 –Present: Visiting Researcher, National Institute for Materials Science
2003 –Present: Researcher, Japan Science and Technology Agency
2002 –Present: Research Associate, Institute for Materials Research, Tohoku University
Dr Suenaga was awarded the Sir Martin Wood Prize at the Millennium Science Forum, organised by Oxford Instruments and which took place at the British Embassy in Tokyo in November 2007. The Millennium Science Forum was established in 1998 to promote scientific exchange between Britain and Japan and recognise the work of outstanding young Japanese researchers. The prize is named after Sir Martin Wood, Founder of Oxford Instruments.
