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Quantum interference can profoundly affect charge transport in single molecules, but experiments can usually measure only the conductance at the Fermi energy. Because in general the most pronounced features of the quantum interference are…

We present a general framework for quantum interference (QI) between multiple, fundamentally different processes. Our framework reveals the importance of shaped input wavefunctions in enabling QI, and predicts unprecedented interactions…

Quantum Physics · Physics 2023-10-10 J. Lim , Y. S. Ang , L. K. Ang , L. J. Wong

This overview will give a glimpse into chemical design principles for exploiting quantum interference (QI) effects in molecular-scale devices. Direct observation of room temperature QI in single-molecule junctions has stimulated growing…

Mesoscale and Nanoscale Physics · Physics 2017-12-19 Colin J. Lambert , Shi-Xia Liu

Molecular junctions -- whether actual single molecules in nanowire break junctions or artificial molecules realized in coupled quantum dot devices -- offer unique functionality due to their orbital complexity, strong electron interactions,…

Mesoscale and Nanoscale Physics · Physics 2024-08-15 Sudeshna Sen , Andrew K. Mitchell

As the dimensions of a conductor approach the nano-scale, quantum effects will begin to dominate its behavior. This entails the exciting possibility of controlling the conductance of a device by direct manipulation of the electron wave…

Destructive quantum interference in molecular junctions might be used to build molecular quantum rulers, allowing to quantify changes in external control parameters electrically. For this reason, it is important to understand which patterns…

Mesoscale and Nanoscale Physics · Physics 2025-07-10 Lukas Krieger , Gert-Ludwig Ingold , Fabian Pauly

We discuss the thermoelectric properties assisted by the Fano effect of a parallel double quantum dot (QD) structure. By adjusting the couplings between the QDs and leads, we facilitate the nonresonant and resonant channels for the Fano…

Mesoscale and Nanoscale Physics · Physics 2011-12-22 Wei-Jiang Gong , Guo-Zhu Wei

Quantum dots (QDs) are good model systems for fundamental studies of mesoscopic transport phenomena using thermoelectric effects because of their small size, electrostatically tunable properties and thermoelectric response characteristics…

Mesoscale and Nanoscale Physics · Physics 2016-11-16 Artis Svilans , Martin Leijnse , Heiner Linke

Molecular electronics offers unique scientific and technological possibilities, resulting from both the nanometre scale of the devices and their reproducible chemical complexity. Two fundamental yet different effects, with no classical…

Mesoscale and Nanoscale Physics · Physics 2017-05-12 Andrew K. Mitchell , Kim G. L. Pedersen , Per Hedegaard , Jens Paaske

We investigate electron transport through azulene molecule with four distinct electrode contact geometries using the non-equilibrium Green's function formalism within the tight-binding Hamiltonian. Employing the Q-matrix approach, we…

Mesoscale and Nanoscale Physics · Physics 2024-12-30 Koushik R. Das , Sudipta Dutta

We show that characteristics of the electron's form factor in two-dimensional materials are observable in quasiparticle interference (QPI) spectrum. We study QPI in twisted bilayer graphene using real-space tight-binding calculations…

Mesoscale and Nanoscale Physics · Physics 2025-09-16 D. -H. -Minh Nguyen , Francisco Guinea , Dario Bercioux

This tutorial outlines the basic theoretical concepts and tools which underpin the fundamentals of phase-coherent electron transport through single molecules. The key quantity of interest is the transmission coefficient T(E), which yields…

Mesoscale and Nanoscale Physics · Physics 2016-01-05 C J Lambert

The role of exchange-correlation effects in non-equilibrium quantum transport through molecular junctions is assessed by analyzing the IV curve of a generic two-level model using self-consistent many-body perturbation theory (second Born…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Kristian S. Thygesen

Coherent electronic transport through individual molecules is crucially sensitive to quantum interference. Using exact diagonalization techniques, we investigate the zero-bias and zero-temperature conductance through $\pi$-conjugated…

Strongly Correlated Electrons · Physics 2015-05-14 Julian Rincon , K. Hallberg , S. Ramasesha

Quasi-particle interference (QPI) is a powerful tool to characterize the symmetry of the superconducting order parameter in unconventional superconductors, by mapping the spatial dependence of elastic tunneling of electrons between the tip…

Asymmetric line shapes can occur in the transmission function describing electron transport in the vicinity of a minimum caused by quantum interference effects. Such asymmetry can be used to increase the thermoelectric efficiency of…

Mesoscale and Nanoscale Physics · Physics 2015-05-28 Robert Stadler , Troels Markussen

Quantum interference is a natural consequence of wave-particle duality in quantum mechanics, and is widely observed at the atomic scale. One interesting manifestation of quantum interference is coherent population trapping (CPT), first…

Mesoscale and Nanoscale Physics · Physics 2022-09-30 Yuan Zhou , Ke Wang , He Liu , Gang Cao , Guang-Can Guo , Xuedong Hu , Hai-Ou Li , Guo-Ping Guo

We show that coherent electron transport through zero-dimensional systems can be used to tailor the shape of the system's transmission function. This quantum-engineering approach can be used to enhance the performance of quantum dots or…

Mesoscale and Nanoscale Physics · Physics 2011-10-10 Olov Karlstrom , Heiner Linke , Gunnar Karlstrom , Andreas Wacker

Quantum interference (QI) effects in molecular systems are a topic of emerging interest in electron transport studies of single molecule junctions. In a recent Letter, Xia et al. employed a graphical scheme introduced by my colleagues and…

Mesoscale and Nanoscale Physics · Physics 2016-11-08 Robert Stadler

If simple guidelines could be established for understanding how quantum interference (QI) can be exploited to control the flow of electricity through single molecules, then new functional molecules, which exploit room-temperature QI could…

Mesoscale and Nanoscale Physics · Physics 2019-03-11 Lara Ulčakar , Tomaž Rejec , Jure Kokalj , Sara Sangtarash , Hatef Sadeghi , Anton Ramšak , John H. Jefferson , Colin J. Lambert