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Probing Molecular‐Transport Properties using the Superconducting Proximity Effect
Author(s) -
Katzir Eran,
Sukenik Nir,
Kalcheim Yoav,
Alpern Hen,
Yochelis Shira,
Berlin Yuri A.,
Ratner Mark A.,
Millo Oded,
Paltiel Yossi
Publication year - 2017
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201600034
Subject(s) - molecular electronics , homo/lumo , superconductivity , chemical physics , materials science , molecule , band gap , nanotechnology , thermal conduction , nanoscopic scale , electron transport chain , electron , electronics , molecular orbital , condensed matter physics , chemistry , physics , optoelectronics , biochemistry , organic chemistry , quantum mechanics , composite material
Molecular electronics research focuses on the study and application of molecular building blocks for the fabrication of nanoscale electronic devices, and on utilizing their self‐organization properties to achieve large‐scale electronic circuits. One of the key issues in molecular electronics is to identify the mechanism governing the electrical conductivity along the molecules. More specifically, the problem is to determine whether the junction behaves as a tunnel barrier, or the junction provides electron or hole conduction channels through the molecule. Due to the large energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), it is usually assumed in calculations that the molecule may contain only one conducting channel either for electrons or for holes. Experimentally, measurements using a local‐probe tip or a small gap between two metallic leads strongly depend on the nature of the linkage between the molecules and the contacts, which is hard to optimize. Here, a new approach is presented to study the electronic and transport properties of molecules using the superconducting proximity effect. Insight into these properties is gained by monitoring the modifications of the superconducting properties upon linking nanoparticles to a superconductor via the studied molecules.