Thermoelectric Corrections to Quantum Voltage Measurement

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.

5 pages, 3 figures

References in corpus (5)

• Giant Thermoelectric Effect from Transmission Supernodes
• Electron transport in a one dimensional conductor with inelastic scattering by self-consistent reservoirs
• Voltage and dephasing probes: a full counting statistics discussion
• ThermoElectric Transport Properties of a Chain of Quantum Dots with Self-Consistent Reservoirs
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Cited by in corpus (4)

• Chiral thermoelectrics with quantum Hall edge states
• Heat diode and engine based on quantum Hall edge states
• Local Temperatures Out of Equilibrium
• The thermodynamic meaning of local temperature of nonequilibrium open quantum systems