The effect of electric field on a fullerene molecule on a metal surface by a nano STM tip

Kaya, Doğan

doi:10.1016/j.physb.2019.01.026

Cited by 4 publications

(2 citation statements)

References 51 publications

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“…In addition, theoretical calculations have shown that defect-free 2D silica can be deformed up to a maximum strain of 10.4%, while for defective samples no abrupt material failure is observed at strains around 7.8-8.1% 63 . Regarding the electric field, by applying bias voltage between the tip of the scanning tunneling microscopy (STM) and the sample, a maximum electric field of 1.7 eV/Å can be obtained 66 . Therefore, both the strain and the electric field used in our calculations are experimentally feasible.…”

Section: Resultsmentioning

confidence: 99%

Phonons as a platform for non-Abelian braiding and its manifestation in layered silicates

et al. 2022

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Topological phases of matter have revolutionised the fundamental understanding of band theory and hold great promise for next-generation technologies such as low-power electronics or quantum computers. Single-gap topologies have been extensively explored, and a large number of materials have been theoretically proposed and experimentally observed. These ideas have recently been extended to multi-gap topologies with band nodes that carry non-Abelian charges, characterised by invariants that arise by the momentum space braiding of such nodes. However, the constraints placed by the Fermi-Dirac distribution to electronic systems have so far prevented the experimental observation of multi-gap topologies in real materials. Here, we show that multi-gap topologies and the accompanying phase transitions driven by braiding processes can be readily observed in the bosonic phonon spectra of known monolayer silicates. The associated braiding process can be controlled by means of an electric field and epitaxial strain, and involves, for the first time, more than three bands. Finally, we propose that the band inversion processes at the Γ point can be tracked by following the evolution of the Raman spectrum, providing a clear signature for the experimental verification of the band inversion accompanied by the braiding process.

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Section: Resultsmentioning

confidence: 99%

Phonons as a platform for non-Abelian braiding and its manifestation in layered silicates

et al. 2022

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“…We determine the threshold to be +3.8 V, where the manipulation occurs because of electronic excitation of a surface state associated with the inserted oxygen. Although increasing the bias voltage increases the tip-sample distance in constant current mode, the electric field still increases [48], which leads to the observed increased manipulation above the voltage threshold [8].…”

Section: Resultsmentioning

confidence: 99%

Combining scanning tunneling microscope (STM) imaging and local manipulation to probe the high dose oxidation structure of the Si(111)-7×7 surface

2020

Self Cite

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Understanding the atomistic formation of oxide layers on semiconductors is important for thin film fabrication, scaling down conventional devices and for the integration of emerging research materials. Here, the initial oxidation of Si(111) is studied using the scanning tunneling microscope. Prior to the complete saturation of the silicon surface with oxygen, we are able to probe the atomic nature of the oxide layer formation. We establish the threshold for local manipulation of inserted oxygen sites to be +3.8 V. Only by combining imaging with local atomic manipulation are we able to determine whether inserted oxygen exists beneath surfacebonded oxygen sites and differentiate between sites that have one and more than one oxygen atom inserted beneath the surface. Prior to the creation of the thin oxide film we observe a flip in the manipulation rates of inserted oxygen sites consistent with more oxygen inserting beneath the silicon surface.

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Self-build of C60-C70 molecular heterojunctions on highly oriented pyrolytic graphite

Guo

Wang

Kaya

et al. 2021

Applied Surface Science

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The effect of electric field on a fullerene molecule on a metal surface by a nano STM tip

Cited by 4 publications

References 51 publications

Phonons as a platform for non-Abelian braiding and its manifestation in layered silicates

Phonons as a platform for non-Abelian braiding and its manifestation in layered silicates

Combining scanning tunneling microscope (STM) imaging and local manipulation to probe the high dose oxidation structure of the Si(111)-7×7 surface

Self-build of C60-C70 molecular heterojunctions on highly oriented pyrolytic graphite

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