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Proceedings Paper

One-dimensional shell-filling and single spin polarization in carbon nanotube quantum dots
Author(s): Koji Ishibashi; Satoshi Moriyama; Tomoko Fuse; Daiju Tsuya; Yoichi Ishiwata
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Paper Abstract

Quantum dots have been fabricated in an individual single-wall carbon nanotube, and their single electron transport has been measured at low temperatures with magnetic field up to 5T. The Coulomb diamonds have shown two and four electron periodicities in different gate voltage ranges. The results can be understood by the two- or four-electron shell filling model. In magnetic fields, the Zeeman splitting of single particle levels has been observed. This means that the single spin polarization is realized when an odd number of electrons are in the dot. The experimental observation suggests an important step for realization of the spin qubit.

Paper Details

Date Published: 25 March 2005
PDF: 9 pages
Proc. SPIE 5732, Quantum Sensing and Nanophotonic Devices II, (25 March 2005); doi: 10.1117/12.580039
Show Author Affiliations
Koji Ishibashi, RIKEN-The Institute of Physical and Chemical Research (Japan)
Japan Science and Technology Agency (Japan)
Satoshi Moriyama, RIKEN-The Institute of Physical and Chemical Research (Japan)
Tokyo Institute of Technology (Japan)
Tomoko Fuse, RIKEN-The Institute of Physical and Chemical Research (Japan)
Tokyo Institute of Technology (Japan)
Daiju Tsuya, RIKEN-The Institute of Physical and Chemical Research (Japan)
Tokyo Institute of Technology (Japan)
Yoichi Ishiwata, RIKEN-The Institute of Physical and Chemical Research (Japan)


Published in SPIE Proceedings Vol. 5732:
Quantum Sensing and Nanophotonic Devices II
Manijeh Razeghi; Gail J. Brown, Editor(s)

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