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2 article(s) from Kopp, Bastian

Thermo-voltage measurements of atomic contacts at low temperature

Ayelet Ofarim,
Bastian Kopp,
Thomas Möller,
León Martin,
Johannes Boneberg,
Paul Leiderer and
Elke Scheer

Beilstein J. Nanotechnol. 2016, 7, 767–775, doi:10.3762/bjnano.7.68

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Figure 1: a) Schematics of the MCBJ mechanism. The sample is represented as the orange line and the junction ...

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Figure 2: Optical setup: An Ar-Kr laser serves as cw laser source at a wavelength of λ = 514 nm and the beam ...

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Figure 3: Conductance histogram at 77 K of 220 opening and closing curves recorded with an applied voltage of...

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Figure 4: A schematic sketch of the measurement circuits. a) The main circuit where the current I is measured...

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Figure 5: Measurement methodology of the main circuit for Au atomic-contacts at 77 K. a) Raw data of V versus...

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Figure 6: a) Raw data of V_Sens versus time at different applied currents, while the laser is pulsing on the s...

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Figure 7: Simulations of the temperature distribution generated by a Gaussian heat source of 1.5 mW and with ...

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Figure 8: Time-dependent simulation of the resistivity of the two sensor leads due to heating. After 4 ms the...

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Figure 9: Thermopower S(G) versus conductance G of individual contacts, calculated from the ∆V(G) data shown ...

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Figure 10: Reflected intensity versus the position of the laser spot across the 36 µm wide gold stripe. The sp...

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Figure 11: Colored scanning electron micrograph of the sample shown in Figure 2, recorded after the measurements under...

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Full Research Paper

Published 30 May 2016

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Revealing thermal effects in the electronic transport through irradiated atomic metal point contacts

Bastian Kopp,
Zhiwei Yi,
Daniel Benner,
Fang-Qing Xie,
Christian Obermair,
Thomas Schimmel,
Johannes Boneberg,
Paul Leiderer and
Elke Scheer

Beilstein J. Nanotechnol. 2012, 3, 703–711, doi:10.3762/bjnano.3.80

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Figure 1: SEM image of the Au electrodes; the gap between the two segments, distinguishable by the border of ...

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Figure 2: (a) Red: Light-induced signal of a gold electrode under illumination (see Figure 1) in an electrochemical e...

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Figure 3: Spatial dependence of the light-induced signal (see Figure 2a) for the two working electrodes. The probed ar...

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Figure 4: Cyclic voltammogram of AgNO₃ under illumination. Twelve insets of zoomed areas at different potenti...

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Figure 5: Cyclic voltammogram (CV) of AgNO₃ at 35 °C (black) and 45 °C (red), scan rate was 50 mV/s. The temp...

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Figure 6: (a) Optical microscope picture of a MCBJ before electrochemical deposition of Ag (bright-field illu...

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Figure 7: (a) Light-induced signal (red) of a dry, electrochemically closed break junction, and the laser pul...

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Figure 8: (a) Illustration of the closed contact; a silver crystallite spans the bridge across the gap betwee...

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Figure 9: (a) Voltage change during the laser pulse at an Au–Ag–Au junction versus time for different bias cu...

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Figure 10: Sketch of the optical setup used for the experiments on the “dry” contacts.

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Figure 11: Sketch of the electronic circuit used for the measurements on the electrochemically controlled cont...

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Figure 12: Sketch of the electrical circuit used for the measurements on the “dry” contacts.

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Figure 13: Diagram of an electrochemical cell used for studying the influence of laser illumination on the cha...

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Full Research Paper

Published 24 Oct 2012

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