Scanning probe-induced thermoelectrics in a quantum point contact
- URL: http://arxiv.org/abs/2106.03908v2
- Date: Mon, 26 Jul 2021 14:56:54 GMT
- Title: Scanning probe-induced thermoelectrics in a quantum point contact
- Authors: Genevi\`eve Fleury, Cosimo Gorini and Rafael S\'anchez
- Abstract summary: We study three-terminal thermoelectric transport in a two-dimensional Quantum Point Contact (QPC) connected to left and right electronic reservoirs.
The latter acts as a voltage probe exchanging heat with the system but no charges on average.
We find tip-induced oscillations of the local and non-local thermopowers and study their dependence on the QPC opening.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study three-terminal thermoelectric transport in a two-dimensional Quantum
Point Contact (QPC) connected to left and right electronic reservoirs, as well
as a third one represented by a scanning probe tip. The latter acts as a
voltage probe exchanging heat with the system but no charges on average. The
thermoelectric coefficients are calculated numerically within the
Landauer-B\"uttiker formalism in the low-temperature and linear response
regimes. We find tip-induced oscillations of the local and non-local
thermopowers and study their dependence on the QPC opening. If the latter is
tuned on a conductance plateau, the system behaves as a perfect thermoelectric
diode: for some tip positions the charge current through the QPC, driven by a
local Seebeck effect, can flow in one direction only.
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