Characterizing Destructive Quantum Interference in Electron Transport
| Autor: | Matthew G. Reuter, Panu Sam-ang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics FOS: Physical sciences General Physics and Astronomy Perturbation (astronomy) Observable 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Electron transport chain 0104 chemical sciences Quantum mechanics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Quantum interference Molecular orbital Electric current 0210 nano-technology Transmission function Computer Science::Information Theory |
| Popis: | Destructive quantum interference in electron transport through molecules provides an unconventional route for suppressing electric current. In this work we introduce "interference vectors" for each interference and use them to characterize the interference. An interference vector may be an orbital of the bare molecule, in which case the interference is very sensitive to perturbation. In contrast, an interference vector may be a combination of multiple molecular orbitals, leading to more robust interference that is likelier to be experimentally observable. Our characterization scheme quantifies these two possibilities through the degree of rotation and also assigns an order to each interference that describes the shape of the Landauer-B\"uttiker transmission function around the interference. Several examples are then presented, showcasing the generality of our theory and characterization scheme, which is not limited to specific classes of molecules or particular molecule-electrode coupling patterns. Comment: 26 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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