Pabi, Biswajit and Marek, Stepan and Klein, Tal and Thakur, Arunabha and Korytar, Richard and Pal, Atindra Nath (2025) Unconventional Electromechanical Response in Ferrocene-Assisted Gold Atomic Chain. NANO LETTERS, 25 (36). pp. 13511-13518. ISSN 1530-6984, 1530-6992
Full text not available from this repository. (Request a copy)Abstract
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOLECULE; CONDUCTANCE; JUNCTIONS; CU; TRANSPORT; EVOLUTION; WIRE; AG; Ferrocene; Break junction; Electro-mechanicalresponse; Atomic chains; Molecule assisted atomicchain |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Regensburg Center for UltrafastNanoscopy (RUN) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Jun 2026 05:50 |
| Last Modified: | 24 Jun 2026 05:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66768 |
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