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We examine, using mixed classical-quantum electron-ion dynamics, electron transfer in a donor-acceptor-like molecular junction system based on polyacetylene. We identify two qualitatively-different transfer regimes: hopping and tunnelling.…

Mesoscale and Nanoscale Physics · Physics 2014-04-25 D. Psiachos

Andreev-reflection dominated transport is demonstrated in Al/n-In0.38Ga0.62As superconductor-semiconductor junctions grown by molecular beam epitaxy on GaAs(001). High junction transparency was achieved in low-doped devices by exploiting Si…

This study introduces a novel real-time betatron tune measurement algorithm, utilizing Schottky signals and an FPGA-based backend architecture, specifically designed for rapidly ramping synchrotrons, with particular application to the…

Accelerator Physics · Physics 2025-06-11 Peihan Sun , Manzhou Zhang , Renxian Yuan , Deming Li , Jian Dong , Ying Shi

Understanding the bottleneck to drive higher critical transition temperature $T_\textrm{c}$ plays a pivotal role in the underlying study of superconductors. We systematically investigate the effect of Li$^+$ substitution for Cu$^{2+}$…

Superconductivity · Physics 2024-12-30 N. K. Man , Huu T. Do

Possible conformations of the thioderivatives of pentacene (Pn) have been considered. The absorption spectra of polythiopentacene (PTPn) solutions and films have been studied. PTPn is revealed to be a mixture of Pn thioderivatives with…

Soft Condensed Matter · Physics 2015-03-23 M. P. Gorishnyi

In this paper, we study the conductance of the graphene nanoribbons(GNRs) in the presence of the Stone-Wales(S-W) reconstruction, using the transfer matrix method. The ribbon is connected with semi-infinite quantum wires as the leads. The…

Mesoscale and Nanoscale Physics · Physics 2015-05-07 Jing Wang , Guiping Zhang , Fei Ye , Xiaoqun Wang

The transport properties of a octane-dithiol (ODT) molecule coupled to Au(001) leads are analyzed using density functional theory and non-equilibrium Green functions. It is shown that a symmetric molecule can turn into a diode under…

Mesoscale and Nanoscale Physics · Physics 2010-02-09 Tomasz Kostyrko , Víctor M. García-Suárez , Colin J. Lambert , Bogdan R. Bułka

We present theoretical results for the radiative rates and doping-dependent photoluminescence spectrum of interlayer excitonic complexes localized by donor impurities in MoSe$_2$/WSe$_2$ twisted heterobilayers, supported by quantum Monte…

Mesoscale and Nanoscale Physics · Physics 2018-06-04 Mark Danovich , David A. Ruiz-Tijerina , Ryan J. Hunt , Marcin Szyniszewski , Neil D. Drummond , Vladimir I. Fal'ko

Nonlinear electrical properties of graphene-based three-terminal nanojunctions are presented. Intrinsic rectification of voltage is observed up to room temperature. The sign and the efficiency of the rectification can be tuned by a gate.…

Mesoscale and Nanoscale Physics · Physics 2010-07-23 A. Jacobsen , I. Shorubalko , L. Maag , U. Sennhauser , K. Ensslin

Superconductor/topological material heterostructures are intensively studied as a platform for topological superconductivity and Majorana physics. However, the high cost of nanofabrication and the difficulty of preparing high-quality…

Superconductivity · Physics 2023-08-03 Keita Ishihara , Le Duc Anh , Tomoki Hotta , Kohdai Inagaki , Masaki Kobayashi , Masaaki Tanaka

We study the conductivity of two-dimensional graphene-type materials with tilted cones as well as their three-dimensional Weyl counterparts and show that a covariant quantum Boltzmann equation is capable of providing an accurate description…

Mesoscale and Nanoscale Physics · Physics 2019-09-04 Saber Rostamzadeh , İnanç Adagideli , M. O. Goerbig

The hadron spectrum at finite density is an important observable for exploring the origin of hadron masses. In the KEK-PS E325 experiment, the di-electron decays of phi mesons inside and outside nuclei were measured using 12 GeV pA…

Spin defects in two-dimensional materials hold significant potential for quantum information technologies and sensing applications. The negatively charged boron vacancy (VB-) in hexagonal boron nitride (hBN) has attracted considerable…

Molecules of bisthiolterthiophene have been adsorbed on the two facing gold electrodes of a mechanically controllable break junction in order to form metal-molecule(s)-metal junctions. Current-voltage (I-V) characteristics have been…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 C. Kergueris , J. -P. Bourgoin , S. Palacin , D. Esteve , C. Urbina , M. Magoga , C. Joachim

We demonstrate a top-down fabricated reconfigurable field effect transistor (RFET) based on a silicon nanowire that can be electrostatically programmed to p- and n-configuration. The device unites a high symmetry of transfer…

The existence of cross-over resonances makes saturated-absorption spectra very complicated when external magnetic field B is applied. It is demonstrated for the first time that the use of micrometric-thin cells (MTC, $L\approx40\,\mu$m)…

The neutron and proton scattering with either deuteron or stable alpha particle can be modeled as a two particle system. In this paper, using Morse function as reference potential, inverse potentials have been computationally constructed…

Nuclear Theory · Physics 2022-09-27 Lalit Kumar , Shikha Awasthi , Anil Khachi , O. S. K. S Sastri

Electron conduction through quasi-one-dimensional (1D) indium atomic wires on silicon (the Si(111)-4x1-In reconstruction) is clarified with the help of local structural analysis using scanning tunneling microscopy. The reconstruction has a…

Materials Science · Physics 2009-11-07 Takashi Uchihashi , Urs Ramsperger

Motivated by recent transport experiments and proposed atomic-scale semiconductor devices, we present measurements that extend the reach of scanned-probe methods to discern the properties of individual dopants tens of nanometers below the…

Mesoscale and Nanoscale Physics · Physics 2009-12-07 M. Gasseller , R. Loo , J. F. Harrison , M. Caymax , S. Rogge , S. H. Tessmer

The wavelength selective linear absorption in communication C-band is investigated in CMOS-processed PECVD silicon nitride rings. In the overcoupled region, the linear absorption loss lowers the on-resonance transmission of a ring resonator…

Optics · Physics 2015-06-22 Tingyi Gu , Mingbin Yu , Dim-Lee Kwong , Chee Wei Wong