Traceable Coulomb Blockade Thermometry

Abstract

We present a measurement and analysis scheme for determining traceable thermodynamic temperature at cryogenic temperatures using Coulomb blockade thermometry. The uncertainty of the electrical measurement is improved by utilizing two sampling digital voltmeters instead of the traditional lock-in technique. The remaining uncertainty is dominated by that of the numerical analysis of the measurement data. Two analysis methods are demonstrated: numerical fitting of the full conductance curve and measuring the height of the conductance dip. The complete uncertainty analysis shows that using either analysis method the relative combined standard uncertainty (k = 1) in determining the thermodynamic temperature in the temperature range from 20 mK to 200 mK is below 0.5 %. In this temperature range, both analysis methods produced temperature estimates that deviated from 0.39 % to 0.67 % from the reference temperatures provided by a superconducting reference point device calibrated against the Provisional Low Temperature Scale of 2000.

11 pages

References in corpus (5)

• Nanoelectronic thermometers optimised for sub-10 millikelvin operation
• Metallic Coulomb Blockade Thermometry down to 10 mK and below
• Primary thermometry in the intermediate Coulomb blockade regime
• Ex-situ Tunnel Junction Process Technique Characterized by Coulomb Blockade Thermometry
• Comparison of Coulomb Blockade Thermometers with the International Temperature Scale PLTS-2000

Cited by in corpus (9)

• Progress in cooling nanoelectronic devices to ultra-low temperatures
• Primary thermometry of a single reservoir using cyclic electron tunneling in a CMOS transistor
• Efficient thermionic operation and phonon isolation by a semiconductor-superconductor junction
• Non-galvanic calibration and operation of a quantum dot thermometer
• Thermal transport in nanoelectronic devices cooled by on-chip magnetic refrigeration
• Coulomb blockade thermometry beyond the universal regime
• Correlation between peak-height modulation and phase-lapses in transport through quantum dots
• Influence of device non-uniformities on the accuracy of Coulomb blockade thermometry
• Coulomb Blockade Thermometry on a Wide Temperature Range