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Quantized conductan...
Quantized conductance in a one-dimensional ballistic oxide nanodevice
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- Jouan, A. (författare)
- Sorbonne Université,Sorbonne University
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- Singh, Gyanendra, 1983 (författare)
- Sorbonne Université,Sorbonne University,Chalmers tekniska högskola,Chalmers University of Technology
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- Lesne, E. (författare)
- Université Paris-Saclay,University Paris-Saclay
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visa fler...
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- Vaz, D. C. (författare)
- Université Paris-Saclay,University Paris-Saclay
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- Bibes, M. (författare)
- Université Paris-Saclay,University Paris-Saclay
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- Barthelemy, A. (författare)
- Université Paris-Saclay,University Paris-Saclay
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- Ulysse, C. (författare)
- Université Paris-Saclay,University Paris-Saclay
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- Stornaiuolo, D. (författare)
- Universita Degli Studi Di Napoli Federico Ii,University of Naples Federico II,Consiglio Nazionale delle Ricerche (CNR),National Research Council of Italy (CNR)
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- Salluzzo, M. (författare)
- Consiglio Nazionale delle Ricerche (CNR),National Research Council of Italy (CNR)
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- Hurand, S. (författare)
- Sorbonne Université,Sorbonne University,Université de Poitiers,University of Poitiers
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- Lesueur, J. (författare)
- Sorbonne Université,Sorbonne University
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- Feuillet-Palma, C. (författare)
- Sorbonne Université,Sorbonne University
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- Bergeal, N. (författare)
- Sorbonne Université,Sorbonne University
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visa färre...
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(creator_code:org_t)
- 2020-03-16
- 2020
- Engelska.
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Ingår i: Nature Electronics. - : Springer Science and Business Media LLC. - 2520-1131. ; 3:4, s. 201-206
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Abstract
Ämnesord
Stäng
- The electric-field effect control of two-dimensional electron gases (2-DEGs) has allowed nanoscale electron quantum transport to be explored in semiconductors. Structures based on transition metal oxides have electronic states that favour the emergence of novel quantum orders that are absent in conventional semiconductors and the 2-DEG formed at a LaAlO3/SrTiO3 interface-a structure in which superconductivity and spin-orbit coupling can coexist-is a promising platform to develop devices for spintronics and topological electronics. However, field-effect control of the properties of this interface at the nanoscale remains challenging. Here we show that a quantum point contact can be formed in a LaAlO3/SrTiO3 interface through electrostatic confinement of the 2-DEG using a split gate. Our device exhibits a quantized conductance due to ballistic transport in a controllable number of one-dimensional conducting channels. Under a magnetic field, the direct observation of the Zeeman splitting between spin-polarized bands allows the determination of the Lande g-factor, whose value differs strongly from that of the free electrons. Through source-drain voltage measurements, we also performed a spectroscopic investigation of the 3d energy levels inside the quantum point contact. The LaAlO3/SrTiO3 quantum point contact could potentially be used as a spectrometer to probe Majorana states in an oxide 2-DEG. A quantum point contact formed in the two-dimensional electron gas of a LaAlO3/SrTiO3 interface exhibits quantized conductance due to ballistic transport in a controllable number of one-dimensional conducting channels.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Jouan, A.
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Singh, Gyanendra ...
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Lesne, E.
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Vaz, D. C.
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Bibes, M.
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Barthelemy, A.
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visa fler...
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Ulysse, C.
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Stornaiuolo, D.
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Salluzzo, M.
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Hurand, S.
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Lesueur, J.
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Feuillet-Palma, ...
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Bergeal, N.
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visa färre...
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