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Electronic conductance through a single molecule is sensitive towards its structural orientation between two electrodes, owing to the distribution of molecular orbitals and their coupling to the electrode levels, that are governed by…

Mesoscale and Nanoscale Physics · Physics 2023-08-11 Koushik R. Das , Sudipta Dutta

Electron transport characteristics are investigated through some molecular chains attached to two non-superconducting electrodes by the use of Green's function method. Here we do parametric calculations based on the tight-binding…

Mesoscale and Nanoscale Physics · Physics 2009-07-31 Santanu K. Maiti

Resonant vibrational and rotation-vibration excitation cross sections for electron-CO scattering are calculated in the 0-10 eV energy range for all 81 vibrational states of CO, assuming that the excitation occur via the 2{\Pi} shape…

Chemical Physics · Physics 2012-08-14 V. Laporta , C. M. Cassidy , J. Tennyson , R. Celiberto

Electronic devices composed of single molecules constitute the ultimate limit in the continued downscaling of electronic components. A key challenge for single-molecule electronics is to control the temperature of these junctions.…

Mesoscale and Nanoscale Physics · Physics 2016-04-08 Jacob Lykkebo , Giuseppe Romano , Alessio Gagliardi , Alessandro Pecchia , Gemma C. Solomon

We propose a tight-binding model to investigate electronic transport properties of single helical protein molecules incorporating both the helical symmetry and the possibility of multiple charge transfer pathways. Our study reveals that due…

Mesoscale and Nanoscale Physics · Physics 2016-06-10 Sourav Kundu , S. N. Karmakar

Time-dependent currents in molecular junctions can be caused by structural fluctuations or interaction with external fields. In this publication, we demonstrate how the hierarchical quantum master equation approach can be used to study…

Mesoscale and Nanoscale Physics · Physics 2019-03-27 Andre Erpenbeck , Lukas Götzendörfer , Christian Schinabeck , Michael Thoss

We study electron transport through single-electron spin-valve transistors in the presence of non-local exchange between the ferromagnetic leads and the central normal-metal island. The Coulomb interaction is described with the orthodox…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Wouter Wetzels , Gerrit E. W. Bauer , Milena Grifoni

A full set of vibrationally-resolved cross sections for electron impact excitation of NO(X2{\Pi}, v) molecules is calculated from ab initio molecular dynamics, in the framework of the local-complex-potential approach. Electron-vibration…

Atomic Physics · Physics 2024-11-15 V Laporta , L Vialetto , V Guerra

We present a microscopic study of single-electron tunneling in nanomechanical double-barrier tunneling junctions formed using a vibrating scanning nanoprobe and a metallic nanoparticle connected to a metallic substrate through a molecular…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Yongqiang Xue , Mark A. Ratner

The relaxation dynamics of correlated electron transport (ET) along molecular chains is studied based on a substantially improved numerically exact path integral Monte Carlo (PIMC) approach. As archetypical model we consider a Hubbard chain…

Statistical Mechanics · Physics 2009-11-11 L. Muehlbacher , J. Ankerhold , A. Komnik

The interplay of electrons with a chiral medium has a diverse impact across science and technology, influencing drug separation, chemical reactions, and electronic transport. In particular, such electronchirality interactions can…

Mesoscale and Nanoscale Physics · Physics 2024-08-23 Anil Kumar Singh , Kevin Martin , Maurizio Mastropasqua Talamo , Axel Houssin , Nicolas Vanthuyne , Narcis Avarvari , Oren Tal

Theoretical and experimental values to date for the resistances of single molecules commonly disagree by orders of magnitude. By reformulating the transport problem using boundary conditions suitable for correlated many-electron systems, we…

Condensed Matter · Physics 2007-05-23 P. Delaney , J. C. Greer

Shuttle-like mechanism of electron transport through a single level vibrating quantum dot is considered in the regime of strong electromechanical coupling. It is shown that the increment of shuttle instability is a nonmonotonic function of…

Mesoscale and Nanoscale Physics · Physics 2013-02-07 Gleb A. Skorobagatko , Ilya V. Krive , Robert I. Shekhter

We theoretically analyze correlation effects on the transport properties of a benzene molecule that are mediated by interactions between the motion of the nuclei and the transmitted charge. We focus on the lowest-lying molecular vibrational…

Mesoscale and Nanoscale Physics · Physics 2013-08-09 Michael Knap , Enrico Arrigoni , Wolfgang von der Linden

Electronic transport characteristics through a single phenalenyl molecule sandwiched between two metallic electrodes are investigated by the use of Green's function technique. A parametric approach, based on the tight-binding model, is used…

Mesoscale and Nanoscale Physics · Physics 2009-11-06 Santanu K. Maiti

We consider electronic transport through break-junctions bridged by a single molecule in the Kondo regime. We describe the system by a two-channel Anderson model. We take the tunneling matrix elements to depend on the position of the…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Jernej Mravlje , Anton Ramsak

We analyze how functionality could be obtained within single-molecule devices by using a combination of non-equilibrium Green's functions and ab-initio calculations to study the inelastic transport properties of single-molecule junctions.…

Mesoscale and Nanoscale Physics · Physics 2015-06-03 L. K. Dash , H. Ness , M. J. Verstraete , R. W. Godby

We present a theory of tunneling and resonant transitions in one-dimensional molecular systems which is based on Green's function theory of electron sub-barrier scattering off the structural units (or functional groups) of a molecular…

Other Condensed Matter · Physics 2007-05-23 I. I. Oleynik , M. A. Kozhushner , V. S. Posvyanskii

Electronic conduction through single molecules is affected by the molecular electronic structure as well as by other information that is extremely difficult to assess, such as bonding geometry and chemical environment. The lack of an…

Mesoscale and Nanoscale Physics · Physics 2009-05-21 Daniel R. Ward , Naomi J. Halas , Jacob W. Ciszek , James M. Tour , Yanpeng Wu , Peter Nordlander , Douglas Natelson

An electron transport is studied in the system which consists of scanning tunneling microscopy-single molecule magnet-metal. Due to quantum tunneling of magnetization in single-molecule magnet, linear response conductance exhibits stepwise…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Gwang-Hee Kim , Tae-Suk Kim