Quantum Electrical Transport in Mesoscopic LaAlO
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概要
- 論文の詳細を見る
We report the fabrication and electrical measurements for LaAlO<inf>3</inf>/SrTiO<inf>3</inf>(LAO/STO) heterostructures having various lateral sizes. When the sample size is reduced to the sub-micrometer range, the magnetoconductance (MC) curve deviates from classical parabolic behavior. Instead, a negative MC behavior appears with superimposed conductance fluctuations, which is attributed to weak antilocalization and universal conductance fluctuations. Using the Maekawa--Fukuyama model, the spin--orbit scattering and phase coherence lengths are estimated from the MC data, which are dependent on the gate voltage and temperature. Our comprehensive study shows that LAO/STO heterointerfaces provide a useful platform to explore quantum coherent transport of strongly correlated electrons.
- 2013-08-25
著者
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KIM Jinhee
Korea Research Institute of Standards and Science
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Lee Soon
Department Of Chemistry College Of Natural Science Sungkyunkwan University
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LEE Joon
Korea Astronomy & Space Science Institute
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Doh Yong-Joo
Department of Display and Semiconductor Physics, Korea University Sejong Campus, Sejong 339-700, Republic of Korea
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Noh Hyunho
Korea Research Institute of Standards and Science, Daejeon 305-600, Republic of Korea
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Chang Jung-Won
Korea Research Institute of Standards and Science, Daejeon 305-600, Republic of Korea
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Song Jonghyun
Department of Physics, Chungnam National University, Daejeon 305-764, Republic of Korea
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Seung Sang
Department of Physics, Chungnam National University, Daejeon 305-764, Republic of Korea
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Baasandorj Lkhagvasuren
Korea Research Institute of Standards and Science, Daejeon 305-600, Republic of Korea
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