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Originally published in Science Express on 25 July 2002
Science 23 August 2002:
Vol. 297. no. 5585, pp. 1313 - 1317
DOI: 10.1126/science.1070958
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Reports

Current Rectification by Pauli Exclusion in a Weakly Coupled Double Quantum Dot System

K. Ono,1 D. G. Austing,23 Y. Tokura,2 S. Tarucha124*

We observe spin blockade due to Pauli exclusion in the tunneling characteristics of a coupled quantum dot system when two same-spin electrons occupy the lowest energy state in each dot. Spin blockade only occurs in one bias direction when there is asymmetry in the electron population of the two dots, leading to current rectification. We induce the collapse of the spin blockade by applying a magnetic field to open up a new spin-triplet current-carrying channel.

1 Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
2 Nippon Telegraph and Telephone Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan.
3 Institute for Microstructural Sciences M23A, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada.
4 Exploratory Research for Advanced Technology Mesoscopic Correlation Project, Japan Science and Technology, Atsugi-shi, Kanagawa 243-0198, Japan.
*   To whom correspondence should be addressed. E-mail: tarucha{at}phys.s.u-tokyo.ac.jp

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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