Quantum degeneracy in atomic point contacts revealed by chemical force and conductance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00399566" target="_blank" >RIV/68378271:_____/13:00399566 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.111.106803" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.111.106803</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.111.106803" target="_blank" >10.1103/PhysRevLett.111.106803</a>
Alternative languages
Result language
angličtina
Original language name
Quantum degeneracy in atomic point contacts revealed by chemical force and conductance
Original language description
Quantum degeneracy is an important concept in quantum mechanics with large implications to many processes in condensed matter. We show the consequences of electron energy level degeneracy on the conductance and the chemical force between two bodies at the atomic scale. We propose a novel way in which a scanning probe microscope can detect the presence of degenerate states in atomic-sized contacts even at room temperature. The tunneling conductance G and chemical binding force F between two bodies both tend to decay exponentially with distance in a certain distance range, usually maintaining direct proportionality to each other. However, we show that a square relation, G proportional to F squared, arises as a consequence of quantum degeneracy between the interacting frontier states of the scanning tip and a surface atom. We demonstrate this phenomenon on the Si(111)-(77) surface reconstruction.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GPP204%2F11%2FP578" target="_blank" >GPP204/11/P578: Ab-initio calculations for the interpretation of scanning-probe microscopy</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
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Volume of the periodical
111
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
"106803-1"-"106803-5"
UT code for WoS article
000324232600022
EID of the result in the Scopus database
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