An introduction to the operation of quantum-dot cellular automata (QCA) is presented, along with recent experimental results. QCA is a transistorless computation paradigm that addresses the issues of device density and interconnection. The basic building blocks of the QCA architecture, such as AND, OR, and NOT are presented. The experimental device is a four-dot QCA cell with two electrometers. The dots are metal islands, which are coupled by capacitors and tunnel junctions. An improved design of the cell is presented in which all four dots of the cell are coupled by tunnel junctions. A noninvasive electrometer is presented which improves the sensitivity and linearity of dot potential measurements. The operation of this basic cell is confirmed by an externally controlled polarization change of the cell.
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July 1999
Papers from the 45th National Symposium of the American Vacuum Society
2-6 November 1998
Baltimore, Maryland (USA)
Research Article|
July 01 1999
Quantum-dot cellular automata
G. L. Snider;
G. L. Snider
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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A. O. Orlov;
A. O. Orlov
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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I. Amlani;
I. Amlani
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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X. Zuo;
X. Zuo
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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G. H. Bernstein;
G. H. Bernstein
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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C. S. Lent;
C. S. Lent
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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J. L. Merz;
J. L. Merz
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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W. Porod
W. Porod
Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
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J. Vac. Sci. Technol. A 17, 1394–1398 (1999)
Article history
Received:
October 12 1998
Accepted:
January 18 1999
Citation
G. L. Snider, A. O. Orlov, I. Amlani, X. Zuo, G. H. Bernstein, C. S. Lent, J. L. Merz, W. Porod; Quantum-dot cellular automata. J. Vac. Sci. Technol. A 1 July 1999; 17 (4): 1394–1398. https://doi.org/10.1116/1.581826
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