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VOLUME 61 (1995) | ISSUE 2 | PAGE 105
Possible self-selection of tunnel channels with reproducible electrical parameters
Coulomb correlations may cause self-selection of quasi-one dimensional current channels in specially prepared granulated material. Characteristic resistance iSo of single channel is much larger than resistance quantum Rjc. It depends on bulk properties of material and on macroscopic geometry of the sample, and may be tuned by nearby gate. Total resistance of the sample becomes quantized in units of Rq. Values of Rq and control voltages may be reproducible from sample to sample. We discuss present experimental status of this idea and its possible applications to single-electron devices operating at up to room temperature.