Unconventional Electromechanical Response in Ferrocene-Assisted Gold Atomic Chain

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10503683" target="_blank" >RIV/00216208:11320/25:10503683 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TKvn0J0ZpC" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TKvn0J0ZpC</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.nanolett.5c02915" target="_blank" >10.1021/acs.nanolett.5c02915</a>

Result language
angličtina
Original language name
Unconventional Electromechanical Response in Ferrocene-Assisted Gold Atomic Chain
Original language description
Atomically thin metallic chains serve as pivotal systems for studying quantum transport, with their conductance strongly linked to the orbital picture. We report an unusual electromechanical response in Au/ferrocene/Au junctions, manifested as tilted "Z"- and "V"-shaped features with more than an order-of-magnitude conductance change upon stretching at cryogenic temperatures, a striking deviation from the flat, decaying, or occasionally increasing profiles typically observed in metallic or molecular junctions. This response emerges during the formation of a ferrocene-assisted atomic gold chain in a mechanically controllable break junction setup, enabled by direct metal-organometallic bonding in the absence of anchoring groups. Density functional calculations reveal that molecular tilting within the chain modulates orbital overlap and transmission spectra, driving the observed conductance evolution. These findings identify metallocene as a distinct class of molecular systems with strong mechanical-electronic coupling, opening pathways to engineer nanoscale devices through the interplay of orbital hybridization and mechanical deformation.
Czech name
—
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/GA22-22419S" target="_blank" >GA22-22419S: Molecular spintronics: control of spin-orbit fields</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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