12 citations · 22 across the 8 of their papers we have counts for
9 papers
Good practice guide on the graphene-based AC-QHE realization of the farad
Luca Callegaro, Stephan Bauer, Blaise Jeanneret +4
This Good Practice Guide provides information for the realization of the farad from the quantum Hall resistance in graphene devices by using digital impedance bridges. The fabricat…
Nonconventional Quantized Hall Resistances Obtained with Equilibration in Epitaxial Graphene Junctions
Albert F. Rigosi, Dinesh Patel, Martina Marzano +9
We have demonstrated the millimeter-scale fabrication of monolayer epitaxial graphene junction devices using simple ultraviolet photolithography, thereby significantly reduci…
Circuit models and SPICE macro-models for quantum Hall effect devices
Massimo Ortolano, Luca Callegaro
Quantum Hall effect (QHE) devices are a pillar of modern quantum electrical metrology. Electrical networks including one or more QHE elements can be used as quantum resistance and…
A three-arm current comparator bridge, for impedance comparisons over the complex plane
Luca Callegaro, Vincenzo D'Elia, Massimo Ortolano +1
We present here the concept of three-arm current comparator impedance bridge, which allows comparisons among three unlike impedances. Its purpose is the calibration of impedances h…
Experiences with a two terminal-pair digital impedance bridge
Luca Callegaro, Vincenzo D'Elia, Marian Kampik +3
This paper describes the realization of a two terminal-pair digital impedance bridge and the test measurements performed with it. The bridge, with a very simple architecture, is ba…
On the synthesis of Quantum Hall Array Resistance Standards
Massimo Ortolano, Marco Abrate, Luca Callegaro
Quantum Hall effect (QHE) is the basis of modern resistance metrology. In Quantum Hall Array Resistance Standards (QHARS), several individual QHE elements, each one having the same…
Bridge connection of quantum Hall elementary devices
Luca Callegaro, Massimo Ortolano
Multiple-series and multiple-parallel connections of quantum Hall elementary devices allow the realization of multiple or fractional values of the quantized Hall resistance, reject…
Matrix method analysis of quantum Hall effect device connections
Massimo Ortolano, Luca Callegaro
The modelling of electrical connections of single, or several, multiterminal quantum Hall effect (QHE) devices is relevant for electrical metrology: it is known, in fact, that cert…
Systematic errors in the correlation method for Johnson noise thermometry: residual correlations due to amplifiers
Luca Callegaro, Marco Pisani, Massimo Ortolano
Johnson noise thermometers (JNT) measure the equilibrium electrical noise, proportional to thermodynamic temperature, of a sensing resistor. In the correlation method, the same res…