Experimental demonstration of a latch in clocked quantum-dot cellular automata
- 8 March 2001
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 78 (11), 1625-1627
- https://doi.org/10.1063/1.1355008
Abstract
We present an experimental demonstration of a latch in a clocked quantum-dot cellular automata (QCA) device. The device consists of three floating micron-size metal dots, connected in series by multiple tunnel junctions and controlled by capacitively coupled gates. The middle dot acts as an adjustable barrier to control single-electron tunneling between end dots. The position of a switching electron in the half cell is detected by a single-electron electrometer. We demonstrate “latching” of a single electron in the end dots controlled by the gate connected to the middle dot. This ability to lock an electron in a controllable way enables pipelining, power gain and reduced power dissipation in QCA arrays.Keywords
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