1997•Physical review. B, Condensed matterRequires access

High-temperature anomaly of the conductance of a tunnel junction

Georg Göppert, Xiaohui Wang, Hermann Grabert

Abstract

The linear conductance of a tunnel junction in series with an Ohmic resistor is determined in the high-temperature limit. The tunneling current is treated nonperturbatively by means of path-integral techniques. Due to quantum effects the conductance is smaller than the classical series conductance. The reduction factor is found to be nonanalytic in the environmental resistance for vanishing resistance. This behavior is a high-temperature manifestation of the Coulomb blockade effect.

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Key concepts: Conductance, Condensed matter physics, Quantum tunnelling, Coulomb blockade, Tunnel junction, Resistor, Anomaly (physics), Ohmic contact