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Issue 14, 2014
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Thermoelectric voltage measurements of atomic and molecular wires using microheater-embedded mechanically-controllable break junctions

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Abstract

We developed a method for simultaneous measurements of conductance and thermopower of atomic and molecular junctions by using a microheater-embedded mechanically-controllable break junction. We find linear increase in the thermoelectric voltage of Au atomic junctions with the voltage added to the heater. We also detect thermopower oscillations at several conductance quanta reflecting the quantum confinement effects in the atomic wire. Under high heater voltage conditions, on the other hand, we observed a peculiar behaviour in the conductance dependent thermopower, which was ascribed to a disordered contact structure under elevated temperatures.

Graphical abstract: Thermoelectric voltage measurements of atomic and molecular wires using microheater-embedded mechanically-controllable break junctions

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Article information


Submitted
08 Jan 2014
Accepted
14 May 2014
First published
19 May 2014

Nanoscale, 2014,6, 8235-8241
Article type
Paper

Thermoelectric voltage measurements of atomic and molecular wires using microheater-embedded mechanically-controllable break junctions

T. Morikawa, A. Arima, M. Tsutsui and M. Taniguchi, Nanoscale, 2014, 6, 8235
DOI: 10.1039/C4NR00127C

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