Vibrational Contributions to Intrinsic Friction in Charged Transition Metal Dichalcogenides

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F17%3A00312522" target="_blank" >RIV/68407700:21230/17:00312522 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1039/c7nr04034b" target="_blank" >http://dx.doi.org/10.1039/c7nr04034b</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c7nr04034b" target="_blank" >10.1039/c7nr04034b</a>

Result language
angličtina
Original language name
Vibrational Contributions to Intrinsic Friction in Charged Transition Metal Dichalcogenides
Original language description
Vibrational contributions to intrinsic friction in layered transition metal dichalcogenides (TMD) have been studied at different charge content. We find that any deviation from charge neutrality produces complex rearrangements of atomic positions and electronic distribution, and consequent phase transitions. Upon charge injection, cell volume expansion is observed, due to charge accumulation along an axis orthogonal to the layer planes. Such accumulation is accounted by the d3z2-r2 orbital of the transition metal and it is regulated by the Pt2g,eg orbital polarization. The latter, in turn, determines the frequency of the phonon modes related to the intrisic friction through non-trivial electro-vibrational coupling. The bond covalency and atom pair cophonicity can be exploited as a knob to control such coupling, ruling subtle charge flows through atomic orbitals hence determining vibrational frequencies at specific charge content. The results can be exploited to finely tune vibrational contributions to intrinsic friction in TMD structures, in order to facilitate assembly and operation of nanoelectromechanical systems and, ultimately, to govern electronic charge distribution in TMD-based devices for applications beyond nanoscale tribology.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/GJ17-24164Y" target="_blank" >GJ17-24164Y: Nanoscale Strategies for Transition Metal Dichalcogenides Exfoliation</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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