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arXiv · 1409.2569

Thermoelectric Corrections to Quantum Voltage Measurement

Justin P. Bergfield·Charles A. Stafford
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Abstract

A generalization of Buttiker's voltage probe concept for nonzero temperatures is an open third terminal of a quantum thermoelectric circuit. An explicit analytic expression for the thermoelectric correction to an ideal quantum voltage measurement is derived, and interpreted in terms of local Peltier cooling/heating within the nonequilibrium system. The thermoelectric correction is found to be large (up to +-24% of the peak voltage) in a prototypical ballistic quantum conductor (graphene nanoribbon). The effects of measurement non-ideality are also investigated. Our findings have important implications for precision local electrical measurements.

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Justin P. Bergfield, Charles A. Stafford. 2014-09-09. Thermoelectric Corrections to Quantum Voltage Measurement. https://doi.org/10.1103/physrevb.90.235438

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