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Mechanoelectric sensitivity reveals destructive quantum interference in single-molecule junctions

Title data

van der Poel, Sebastiaan ; Hurtado-Gallego, Juan ; Blaschke, Matthias ; López-Nebreda, Rubén ; Gallego, Almudena ; Mayor, Marcel ; Pauly, Fabian ; van der Zant, Herre S. J. ; Agraït, Nicolás:
Mechanoelectric sensitivity reveals destructive quantum interference in single-molecule junctions.
In: Nature Communications. Vol. 15 (2024) . - 10097.
ISSN 2041-1723
DOI: https://doi.org/10.1038/s41467-024-53825-x

Official URL: Volltext

Abstract in another language

Quantum interference plays an important role in charge transport through single-molecule junctions, even at room temperature. Of special interest is the measurement of the destructive quantum interference dip itself. Such measurements are especially demanding when performed in a continuous mode of operation. Here, we use mechanical modulation experiments at ambient conditions to reconstruct the destructive quantum interference dip of conductance versus displacement. Simultaneous measurements of the Seebeck coefficient show a sinusoidal response across the dip without sign change. Calculations that include electrode distance and energy alignment variations explain both observations quantitatively, emphasizing the crucial role of thermal fluctuations for measurements under ambient conditions. Our results open the way for establishing a closer link between break-junction experiments and theory in explaining single-molecule transport phenomena, especially when describing sharp features in the transmission.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Research Institutions > Collaborative Research Centers, Research Unit > SFB 1585 - MultiTrans – Structured functional materials for multiple transport in nanoscale confinements
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 03 Dec 2024 07:44
Last Modified: 03 Dec 2024 07:44
URI: https://eref.uni-bayreuth.de/id/eprint/91304