| 摘要 |
A method of forming a nano-scale device with a probe such as a STM on a substrate includes the step of rendering the relevant part of the substrate conductive whilst the device is being formed with the probe so that current can flow from the probe to the substrate. Thereafter, to operate the device, the substrate is rendered non-conductive so as to prevent dissipation of current from the device through the substrate. The substrate can be altered in conductivity by cooling to undergo a Mott transition, can be heated from a normally non-conductive condition to become conductive, or subject to laser radiation to induce charge carriers to render it conductive.
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