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Scanning tunneling spectroscopy

About: Scanning tunneling spectroscopy is a research topic. Over the lifetime, 7886 publications have been published within this topic receiving 213828 citations.


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Journal ArticleDOI
TL;DR: A combination of charge-transfer and lattice-matching properties for TCNE across substrates results in a strong variation of molecule-molecule and molecule-substrate interactions, which has significant implications for future organic/inorganic nanoscopic devices incorporating molecule-based magnetism.
Abstract: We have studied the structural and electronic properties of tetracyanoethylene (TCNE) molecules on different noble-metal surfaces using scanning tunneling spectroscopy and density functional theory. Striking differences are observed in the TCNE behavior on Au, Ag, and Cu substrates in the submonolayer limit. We explain our findings by a combination of charge-transfer and lattice-matching properties for TCNE across substrates that results in a strong variation of molecule-molecule and molecule-substrate interactions. These results have significant implications for future organic/inorganic nanoscopic devices incorporating molecule-based magnetism.

88 citations

Journal ArticleDOI
TL;DR: The tunneling current shows very strong oscillations lined up with the 2${\mathit{e}}^{2}$/h conductance steps for the waveguide current, a proposed explanation is that the oscillations are a result of the 1D density of states sweeping through the Fermi level.
Abstract: On an AlGaAs/GaAs heterostructure, we have implemented a unique ``leaky'' electron waveguide with a thin tunneling barrier as one of its confining boundaries. The current flowing through the waveguide as well as the 1D to 2D tunneling current leaking out the thin side barrier were independently measured as the electron density in the waveguide was modulated. The tunneling current shows very strong oscillations lined up with the 2${\mathit{e}}^{2}$/h conductance steps for the waveguide current. A proposed explanation is that the oscillations are a result of the 1D density of states sweeping through the Fermi level.

87 citations

Journal ArticleDOI
TL;DR: In this article, the formation of Cu 2 FeSnS 4 (CFTS) thin-films through successive ionic layer adsorption and reaction (SILAR) method is presented.

87 citations

Journal ArticleDOI
TL;DR: This work investigated the contact between the molecular wire group of a C90H98 (Lander) molecule and the edge of a Cu(111) monatomic step with reproducible contact and decontact.
Abstract: A crucial problem in molecular electronics is the control of the electronic contact between a molecule and its electrodes. As a model system, we investigated the contact between the molecular wire group of a C90H98 (Lander) molecule and the edge of a Cu(111) monatomic step. The reproducible contact and decontact of the wire was obtained by manipulating the Lander with a low temperature scanning tunneling microscope. The electronic standing wave patterns on the Cu(111) surface serve to monitor the local electronic perturbation caused by the interaction of the wire end with the step edge, giving information on the quality of the contact.

87 citations

Journal ArticleDOI
TL;DR: Coupling state-of-the-art spin-polarized scanning tunneling spectroscopy and spin-resolved ab initio calculations, the first experimental evidence of the spin splitting of a molecular orbital on a single non magnetic C(60) molecule in contact with a magnetic material, namely, the Cr(001) surface is given.
Abstract: Using organic materials in spintronic devices raises a lot of expectation for future applications due to their flexibility, low cost, long spin lifetime, and easy functionalization. However, the interfacial hybridization and spin polarization between the organic layer and the ferromagnetic electrodes still has to be understood at the molecular scale. Coupling state-of-the-art spin-polarized scanning tunneling spectroscopy and spin-resolved ab initio calculations, we give the first experimental evidence of the spin splitting of a molecular orbital on a single non magnetic C(60) molecule in contact with a magnetic material, namely, the Cr(001) surface. This hybridized molecular state is responsible for an inversion of sign of the tunneling magnetoresistance depending on energy. This result opens the way to spin filtering through molecular orbitals.

87 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202345
202289
2021128
2020143
2019134
2018159