Coulomb Blockade Thermometry Beyond the Universal Regime
Journal article, 2021

The charge localization of single electrons on mesoscopic metallic islands leads to a suppression of the electrical current, known as the Coulomb blockade. When this correction is small, it enables primary electron thermometry, as it was first demonstrated by Pekola et al. (Phys Rev Lett 73:2903, 1994). However, in the low temperature limit, random charge offsets influence the conductance and limit the universal behavior of a single metallic island. In this work, we numerically investigate the conductance of a junction array and demonstrate the extension of the primary regime for large arrays, even when the variations in the device parameters are taken into account. We find that our simulations agree well with measured conductance traces in the submillikelvin electron temperature regime.

Single electron tunneling

Coulomb blockade thermometry

Tunnel junction arrays

Author

Nikolai Yurttagul

Technical Research Centre of Finland (VTT)

Delft University of Technology

Matthew Sarsby

Delft University of Technology

Attila Geresdi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Delft University of Technology

Journal of Low Temperature Physics

0022-2291 (ISSN) 1573-7357 (eISSN)

Vol. 204 3-4 143-162

Subject Categories

Other Physics Topics

Other Materials Engineering

Condensed Matter Physics

DOI

10.1007/s10909-021-02603-w

More information

Latest update

9/22/2021