Microfabrication of a mechanically controllable break junction in silicon

1995 ◽  
Vol 67 (8) ◽  
pp. 1160-1162 ◽  
Author(s):  
C. Zhou ◽  
C. J. Muller ◽  
M. R. Deshpande ◽  
J. W. Sleight ◽  
M. A. Reed
Keyword(s):  
Break Junction

scholarly journals A flexible platform for controlled optical and electrical effects in tailored plasmonic break junctions

Nanophotonics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1391-1400
Author(s):  
Florian Laible ◽  
Kai Braun ◽  
Otto Hauler ◽  
Martin Eberle ◽  
Dieter P. Kern ◽  
...  
Keyword(s):  
Electrical Characterization ◽  
Tunneling Current ◽  
Plasmonic Nanostructures ◽  
Break Junction ◽  
Metal Contacts ◽  
Break Junctions ◽  
Constant Bias ◽  
Confocal Scanning ◽  
Atomic Point Contacts

AbstractMechanically controllable break junctions are one suitable approach to generate atomic point contacts and ultrasmall and controllable gaps between two metal contacts. For constant bias voltages, the tunneling current can be used as a ruler to evaluate the distance between the contacts in the sub-1-nm regime and with sub-Å precision. This ruler can be used to measure the distance between two plasmonic nanostructures located at the designated breaking point of the break junction. In this work, an experimental setup together with suitable nanofabricated break junctions is developed that enables us to perform simultaneous gap-dependent optical and electrical characterization of coupled plasmonic particles, more specifically bowtie antennas in the highly interesting gap range from few nanometers down to zero gap width. The plasmonic break junction experiment is performed in the focus of a confocal microscope. Confocal scanning images and current measurements are simultaneously recorded and exhibit an increased current when the laser is focused in the proximity of the junction. This setup offers a flexible platform for further correlated optoelectronic investigations of coupled antennas or junctions bridged by nanomaterials.

In-situ photoconductivity measurement of imidazole in optical fiber break-junctions

2021 ◽  
Author(s):  
Zhikai Zhao ◽  
Chenyang Guo ◽  
Lifa Ni ◽  
Xueyan Zhao ◽  
Surong Zhang ◽  
...  
Keyword(s):  
Electron Transport ◽  
Optical Fiber ◽  
Transport Properties ◽  
Molecular Junctions ◽  
Break Junction ◽  
Break Junctions ◽  
Fiber Break ◽  
Electron Transport Properties ◽  
Photoconductivity Measurement

We develop a method based on the mechanically controllable break junction technique to investigate the electron transport properties of single molecular junctions upon fiber waveguided light. In our strategy, a...

Tunneling spectroscopy of a La-Sr-Cu-O break junction: Evidence for strong-coupling superconductivity

1987 ◽  
Vol 35 (16) ◽  
pp. 8711-8713 ◽  
Author(s):  
John Moreland ◽  
A. F. Clark ◽  
L. F. Goodrich ◽  
H. C. Ku ◽  
R. N. Shelton
Keyword(s):  
Strong Coupling ◽  
Tunneling Spectroscopy ◽  
Break Junction

scholarly journals Thermo-voltage measurements of atomic contacts at low temperature

2016 ◽  
Vol 7 ◽  
pp. 767-775 ◽  
Author(s):  
Ayelet Ofarim ◽  
Bastian Kopp ◽  
Thomas Möller ◽  
León Martin ◽  
Johannes Boneberg ◽  
...  
Keyword(s):  
Finite Element ◽  
Low Temperature ◽  
Temperature Difference ◽  
Laser Heating ◽  
Laser Source ◽  
Break Junction ◽  
Resistance Change ◽  
Element Simulation ◽  
Novel Method

We report the development of a novel method to determine the thermopower of atomic-sized gold contacts at low temperature. For these measurements a mechanically controllable break junction (MCBJ) system is used and a laser source generates a temperature difference of a few kelvins across the junction to create a thermo-voltage. Since the temperature difference enters directly into the Seebeck coefficient S = −ΔV/ΔT, the determination of the temperature plays an important role. We present a method for the determination of the temperature difference using a combination of a finite element simulation, which reveals the temperature distribution of the sample, and the measurement of the resistance change due to laser heating of sensor leads on both sides next to the junction. Our results for the measured thermopower are in agreement with recent reports in the literature.

Measurement and control of detailed electronic properties in a single molecule break junction

2014 ◽  
Vol 174 ◽  
pp. 91-104 ◽  
Author(s):  
Kun Wang ◽  
Joseph Hamill ◽  
Jianfeng Zhou ◽  
Cunlan Guo ◽  
Bingqian Xu
Keyword(s):  
Data Analysis ◽  
Molecular Electronics ◽  
Single Molecule ◽  
Molecular Orbitals ◽  
Break Junction ◽  
Break Junctions ◽  
Single Molecule Level ◽  
Analysis Techniques ◽  
Future Design ◽  
Molecule Junction

The lack of detailed experimental controls has been one of the major obstacles hindering progress in molecular electronics. While large fluctuations have been occurring in the experimental data, specific details, related mechanisms, and data analysis techniques are in high demand to promote our physical understanding at the single-molecule level. A series of modulations we recently developed, based on traditional scanning probe microscopy break junctions (SPMBJs), have helped to discover significant properties in detail which are hidden in the contact interfaces of a single-molecule break junction (SMBJ). For example, in the past we have shown that the correlated force and conductance changes under the saw tooth modulation and stretch–hold mode of PZT movement revealed inherent differences in the contact geometries of a molecular junction. In this paper, using a bias-modulated SPMBJ and utilizing emerging data analysis techniques, we report on the measurement of the altered alignment of the HOMO of benzene molecules with changing the anchoring group which coupled the molecule to metal electrodes. Further calculations based on Landauer fitting and transition voltage spectroscopy (TVS) demonstrated the effects of modulated bias on the location of the frontier molecular orbitals. Understanding the alignment of the molecular orbitals with the Fermi level of the electrodes is essential for understanding the behaviour of SMBJs and for the future design of more complex devices. With these modulations and analysis techniques, fruitful information has been found about the nature of the metal–molecule junction, providing us insightful clues towards the next step for in-depth study.

scholarly journals Unsupervised feature recognition in single-molecule break junction data

Nanoscale ◽  
2020 ◽  
Vol 12 (15) ◽  
pp. 8355-8363 ◽  
Author(s):  
András Magyarkuti ◽  
Nóra Balogh ◽  
Zoltán Balogh ◽  
Latha Venkataraman ◽  
András Halbritter
Keyword(s):  
Neural Network ◽  
Network Analysis ◽  
Single Molecule ◽  
Feature Recognition ◽  
Principal Component ◽  
Break Junction ◽  
Neural Network Analysis ◽  
Efficient Tool

A combined principal component and neural network analysis serves as an efficient tool for the unsupervised recognition of unobvious but highly relevant trace classes in single-molecule break junction data.

scholarly journals Flux Penetration Effects in High-Tc SQUIDs

1989 ◽  
Vol 42 (4) ◽  
pp. 401
Author(s):  
GJ SIoggett ◽  
lK Harvey ◽  
L Wieczorek ◽  
RE Binks ◽  
R Driver
Keyword(s):  
Magnetic Field ◽  
Copper Oxide ◽  
Direct Measurement ◽  
Barium Copper Oxide ◽  
Break Junction ◽  
Flux Penetration ◽  
High Tc ◽  
Bulk Ybco ◽  
Barium Copper ◽  
Yttrium Barium

Two experiments pertaining to the effects of intergranular flux penetration in high-Tc yttrium-barium-copper oxide (YBCO) SQUIDs are described. The first is a direct measurement of the flux noise of bulk YBCO exposed to the earth's magnetic field, and the second involves the fabrication and testing of break junction d.c. SQUIDs. Implications of a number of undesirable effects seen in these experiments are discussed.

scholarly journals Local transport characteristics of break junction in Sr2RuO4 microbridge

2011 ◽  
Vol 471 (21-22) ◽  
pp. 708-710 ◽  
Author(s):  
H. Kambara ◽  
S. Kashiwaya ◽  
H. Kashiwaya ◽  
Y. Tanaka ◽  
Y. Maeno
Keyword(s):  
Break Junction ◽  
Local Transport
Sign in / Sign up

Export Citation Format

Share Document