Thermal Crossover between Ultrasmall Double and Single Junction

TL;DR

This paper investigates the transition from double to single junction behavior in ultrasmall tunnel junctions using a theoretical approach, with temperature variation serving as the key parameter to observe the crossover.

Contribution

It introduces a theoretical model to analyze the thermal crossover in ultrasmall tunnel junctions within a scanning-tunneling microscope setup.

Findings

Identifies the temperature-driven transition between double and single junction regimes.

Provides a theoretical framework for understanding ultrasmall tunnel junction behavior.

Suggests experimental conditions to observe the crossover.

Abstract

The crossover from double-junction behavior to single-junction behavior of ultrasmall tunnel junctions is studied theoretically in a scanning-tunneling microscope setup. The independently variable tip temperature of the microscope is used to monitor the transition between both regimes.