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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…

介观与纳米尺度物理 · 物理学 2024-12-30 Koushik R. Das , Sudipta Dutta

We have designed and synthesized five azulene derivatives containing gold- binding groups at different points of connectivity within the azulene core to probe the effects of quantum interference through single-molecule conductance…

Quantum interference (QI) in molecular transport junctions can lead to dramatic reductions of the electron transmission at certain energies. In a recent work [Markussen et al., Nano Lett. 2010, 10, 4260] we showed how the presence of such…

介观与纳米尺度物理 · 物理学 2017-09-13 Troels Markussen , Robert Stadler , Kristian S. Thygesen

Destructive quantum interference (QI) has been a source of interest as a new paradigm for molecular electronics as the electronic conductance is widely dependent on the occurrence or absence of destructive QI effects. In order to interpret…

介观与纳米尺度物理 · 物理学 2022-09-23 O. Sengul , A. Valli , R. Stadler

Since the concepts for the implementation of data storage and logic gates used in conventional electronics cannot be simply downscaled to the level of single molecule devices, new architectural paradigms are needed, where quantum…

介观与纳米尺度物理 · 物理学 2015-12-16 Robert Stadler

Quantum interference in coherent transport through single molecular rings may provide a mechanism to control current in molecular electronics. We investigate its applicability by using a single-particle Green function method combined with…

介观与纳米尺度物理 · 物理学 2009-08-11 San-Huang Ke , Weitao Yang , Harold U. Baranger

Quantum interference (QI) effects in molecular junctions may be used to obtain large thermoelectric responses. We study the electrical conductance G and the thermoelec- tric response of a series of molecules featuring a quinoid core using…

介观与纳米尺度物理 · 物理学 2015-07-02 M. Strange , J. S. Seldenthuis , C. J. O. Verzijl , J. M. Thijssen , G. C. Solomon

Quantum interference, be it destructive or constructive, has a substantial influence on the magnitude of molecular conductance and consequently there is significant interest in predicting these effects. It is commonly thought that…

介观与纳米尺度物理 · 物理学 2015-10-21 Kim G. L. Pedersen , Anders Borges , Per Hedegård , Gemma C. Solomon , Mikkel Strange

Using the tight-binding model and the generalized Green's function formalism, the effect of quantum interference on the electron transport through the benzene molecule in a semiconductor/benzene/semiconductor junction is numerically…

介观与纳米尺度物理 · 物理学 2016-08-09 Javad Vahedi , Zahra Sartipi

Destructive quantum interference (DQI) in single molecule electronics is a purely quantum mechanical effect and entirely defined by inherent properties of the molecule in the junction such as its structure and symmetry. This definition of…

介观与纳米尺度物理 · 物理学 2017-01-04 Xin Zhao , Victor Geskin , 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…

介观与纳米尺度物理 · 物理学 2019-03-11 Lara Ulčakar , Tomaž Rejec , Jure Kokalj , Sara Sangtarash , Hatef Sadeghi , Anton Ramšak , John H. Jefferson , Colin J. Lambert

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…

强关联电子 · 物理学 2015-05-14 Julian Rincon , K. Hallberg , S. Ramasesha

We study the charge transport properties of triangular quantum dot molecule (TQDM) connected to metallic electrodes, taking into account all correlation functions and relevant charging states. The quantum interference (QI) effect of TQDM…

介观与纳米尺度物理 · 物理学 2015-02-24 Chih-Chieh Chen , Yia-chung Chang , David M T Kuo

Using first-principles calculations we analyze the electronic transport properties of a recently proposed anthraquinone based electrochemical switch. Robust conductance on/off ratios of several orders of magnitude are observed due to…

介观与纳米尺度物理 · 物理学 2015-05-18 Troels Markussen , Jakob Schiøtz , Kristian S. Thygesen

We investigate the stability of destructive quantum interference (DQI) in electron transport through graphene nanostructures connected to source and drain electrodes. The fingerprint of DQI is the presence of an antiresonance in the…

介观与纳米尺度物理 · 物理学 2025-07-03 A. Valli , T. Fabian , F. Libisch , R. Stadler

The adsorption structure of the molecular switch azobenzene on Ag(111) is investigated by a combination of normal incidence x-ray standing waves and dispersion-corrected density functional theory. The inclusion of non-local collective…

We demonstrate that hexagonal graphene nanoflakes with zigzag edges display quantum interference (QI) patterns analogous to benzene molecular junctions. In contrast with graphene sheets, these nanoflakes also host magnetism. The cooperative…

强关联电子 · 物理学 2019-02-26 Angelo Valli , Adriano Amaricci , Valentina Brosco , Massimo Capone

We study the role of electronic spin and valley symmetry in the quantum interference (QI) patterns of the transmission function in graphene quantum junctions. In particular, we link it to the position of the destructive QI anti-resonances.…

强关联电子 · 物理学 2019-08-21 Angelo Valli , Adriano Amaricci , Valentina Brosco , Massimo Capone

We achieve, at room temperature, conductance enhancements over two orders of magnitude in single molecule circuits formed with polycyclic benzoquinoidal (BQn) diradicals upon increasing molecular length by ~0.5 nm. We find that this extreme…

介观与纳米尺度物理 · 物理学 2024-03-11 Brent Lawson , Efrain Vidal , Michael M. Haley , Maria Kamenetska

We make a systematic theoretical analysis on the quantum interference (QI) effects in various fast-light media (including gain-assisted $N$, gain-assisted ladder-I, and gain-assisted ladder-II atomic systems). We show that such fast-light…

光学 · 物理学 2015-10-15 Datang Xu , Chaohua Tan , Guoxiang Huang
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