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Ab-initio total energy calculations reveal benzene-dithiolate (BDT) molecules on a gold surface, contacted by a monoatomic gold STM tip to have two classes of low energy conformations with differing symmetries. Lateral motion of the tip or…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Eldon G. Emberly , George Kirczenow

We propose a new scalable platform for quantum computing (QC) -- an array of optically trapped symmetric-top molecules (STMs) of the alkaline earth monomethoxide (MOCH$_3$) family. Individual STMs form qubits, and the system is readily…

Atomic Physics · Physics 2019-10-01 Phelan Yu , Lawrence W. Cheuk , Ivan Kozyryev , John M. Doyle

Single-molecule magnets (SMMs) with chemically tailorable properties are potential building blocks for quantum computing, high-density magnetic memory, and spintronics.1 2 3,4 These applications require isolated or few molecules on…

A linear chain of connected electron sites with two asymmetric sinks, one attached to each end, is used as a simple model of quantum electron transfer in photosynthetic bio-complexes. For a symmetric initial population in the middle of the…

Quantum Physics · Physics 2014-03-31 D. Ferrari , G. L. Celardo , G. P. Berman , R. T. Sayre , F. Borgonovi

The appealing feature of molecular electronics is the possibility of exploiting functionality built within a single molecule. This functionality can be employed, for example, for sensing or switching purposes. Thus, ideally, the associated…

We demonstrate a novel all-optical switch consisting of two molecules: a primary fluorophore that can be switched between a fluorescent and a dark state by light of different wavelengths, and a secondary chromophore that facilitates…

Quantitative Methods · Quantitative Biology 2009-11-11 Mark Bates , Timothy R. Blosser , Xiaowei Zhuang

The possibility of using single molecule junctions as electron pumps for energy conversion and storage is considered. It is argued that the small dimensions of these systems enable to make use of unique intra-molecular quantum coherences in…

Quantum Physics · Physics 2015-05-20 Roie Volkovich , Uri Peskin

We measure the low bias conductance of a series of substituted benzene diamine molecules while breaking a gold point contact in a solution of the molecules. Transport through these substituted benzenes is by means of nonresonant tunneling…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Latha Venkataraman , Young S. Park , Adam C. Whalley Colin Nuckolls , Mark S. Hybertsen , Michael L. Steigerwald

The single-molecule conductance of a 3-ring, conjugated azomethine was studied using the mechanically controlled breakjunction technique. Charge transport properties are found to be comparable to vinyl-based analogues; findings are…

Mesoscale and Nanoscale Physics · Physics 2016-08-18 Max Koole , Riccardo Frisenda , Michiel L. Petrus , Mickael L. Perrin , Herre S. J. van der Zant , Theo J. Dingemans

The interaction between the electric dipole moment of a trapped molecular ion and the configuration of the confined Coulomb crystal couples the orientation of the molecule to its motion. We consider the practical feasibility of harnessing…

Atomic Physics · Physics 2020-09-23 Wesley C. Campbell , Eric R. Hudson

The scaled-up qubits proposed are molecules which display large amplitude motions at very low temperatures and the matrix that traps them. These comprise ionic solids such as ammonium tetraphenylborate (ATPB) or methane dilute in a xenon…

Quantum Physics · Physics 2020-04-06 Malcolm P. Roberts

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

Single molecular rotor is an important component for constructing bot-tom-up molecular mechanical machines and a window for shedding light on complex physical and chemical questions about motions of organic molecules on surfaces. Stability…

Mesoscale and Nanoscale Physics · Physics 2022-04-05 Kwan Ho Au Yeung , Tim Kühne , Frank Eisenhut , Francesca Moresco

We have measured a graphene double quantum dot device with multiple electrostatic gates that are used to enhance control to investigate it. At low temperatures the transport measurements reveal honeycomb charge stability diagrams which can…

Mesoscale and Nanoscale Physics · Physics 2015-05-20 L. J. Wang , H. O. Li , Z. Su , T. Tu , G. Cao , C. Zhou , X. J. Hao , G. C. Guo , G. P. Guo

We present a theoretical model of spin transitions in stacks of molecular layers. Our model captures the already established physics of these systems (thermal hysteretic transitions and crossovers) and suggests a way towards in situ control…

Strongly Correlated Electrons · Physics 2019-12-25 O. I. Utesov , S. Burdin , P. Rosa , M. Gonidec , L. Poggini , S. V. Andreev

We analyse recently proposed physical implementations of a quantum computer based on polar molecules. A set of general requirements for a molecular system is presented, which would provide an optimal combination of quantum gate times,…

Quantum Physics · Physics 2007-10-25 Elena Kuznetsova , Robin Côté , Kate Kirby , Susanne Yelin

Electron spins in single molecules are a promising platform for quantum information processing. However, their practical implementation as qubits requires reliable control at the single-entity level, including an efficient state…

Incorporating functional molecules into sensor devices is an emerging field in molecular electronics that aims at exploiting the sensitivity of different molecules to their environment and turning it into an electrical signal. Among the…

Donors in silicon, conceptually described as hydrogen atom analogues in a semiconductor environment, have become a key ingredient of many "More-than-Moore" proposals such as quantum information processing [1-5] and single-dopant electronics…

Mesoscale and Nanoscale Physics · Physics 2015-04-07 M. Fernando Gonzalez-Zalba , André Saraiva , Dominik Heiss , Maria J. Calderón , Belita Koiller , Andrew J. Ferguson

Spin crossover (SCO) molecules are promising bi-stable magnetic switches with applications in molecular spintronics. However, little is known about the switching effects of a single SCO molecule when it is confined between two metal…

Mesoscale and Nanoscale Physics · Physics 2020-06-12 Alex Gee , Ayoub H. Jaafar , Barbora Brachňaková , Jamie Massey , Christopher H. Marrows , Ivan Šalitroš , N. T. Kemp