On Thermometer Operation of Ultrasmall Tunnel Junctions

H. -O. Müller; A. Hädicke; W. Krech

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arXiv · cond-mat/9410044

On Thermometer Operation of Ultrasmall Tunnel Junctions

H. -O. Müller·A. Hädicke·W. Krech

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Abstract

The temperature dependence of the I-V characteristics of many single-electron tunneling devices enable thermometer operation of these systems. We investigate two normal conducting kinds of them, {\sl (a)} a single junction in a high-impedance environment, and {\sl (b)} a double junction. The characteristics of both devices show a crossover from Coulomb blockade at low temperatures to ohmic behavior at high temperatures. The related differential conductivity dip allows the determination of the junctions temperature. Both configurations {\sl (a)} and {\sl (b)} are expected to work at least within the range $0.5\leβE_{\rm C}\le 10$, where $E_{\rm C}$ is the Coulomb energy of the system under investigation. We present an analytical solution for both low- and high-temperature case of {\sl (a)} and {\sl (b)} as well as numerical results and their fit, including the effect of co-tunneling in case of a double junction.

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H. -O. Müller, A. Hädicke, W. Krech. 1994-10-13. On Thermometer Operation of Ultrasmall Tunnel Junctions. https://arxiv.org/abs/cond-mat/9410044

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