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Numerical simulations are important when assessing the many characteristics of field emission related phenomena. In small simulation domains, the electrostatic effect from the boundaries is known to influence the calculated apex field…

介观与纳米尺度物理 · 物理学 2018-07-02 Thiago A. de Assis , Fernando F. Dall'Agnol

We investigate the spontaneous emission rate of a two-level quantum emitter near a graphene-coated substrate under the influence of an external magnetic field or strain induced pseudo-magnetic field. We demonstrate that the application of…

介观与纳米尺度物理 · 物理学 2015-12-09 W. J. M. Kort-Kamp , B. Amorim , G. Bastos , F. A. Pinheiro , F. S. S. Rosa , N. M. R. Peres , C. Farina

The effects of surface curvature on the motion of electrons in a mesoscopic two-dimensional ring on a cone in the presence of external magnetic fields are examined. The approach follows the thin-layer quantization procedure, which gives…

介观与纳米尺度物理 · 物理学 2019-11-04 Luís Fernando C. Pereira , Fabiano M. Andrade , Cleverson Filgueiras , Edilberto O. Silva

The expression for the intensity of the electromagnetic field radiation is derived in the approximation next to the dipole one. The presented approach is based on fundamental equations from the introductory course on classical…

经典物理 · 物理学 2018-09-21 Andrij Rovenchak , Yuri Krynytskyi

The impact of the strongly attractive electromagnetic field of heavy nuclei on electrons in quasi-elastic (e,e') scattering is often accounted for by the effective momentum approximation. This method is a plane wave Born approximation which…

核理论 · 物理学 2011-11-09 Andreas Aste , Dirk Trautmann

We have studied the effect of dynamical correlations on the electronic structure of single Co adatoms on graphene monolayers with a recently developed novel method for nanoscopic materials that combines density functional calculations with…

介观与纳米尺度物理 · 物理学 2010-08-31 D. Jacob , G. Kotliar

Field electron emission from an ultrathin multilayer planar cold cathode (UMPC) including quantum well structure has been both experimentally and theoretically investigated. We found that only tuning the energy levels of UMPC the field…

介观与纳米尺度物理 · 物理学 2009-11-11 R. Z. Wang , H. Yan , B. Wang , X. W. Zhang , X. Y. Hou

The Stark effect provides a powerful method to shift the spectra of molecules, atoms and electronic transitions in general, becoming one of the simplest and most straightforward way to tune the frequency of quantum emitters by means of a…

We find the leading order result for the anapole form factor of the deuteron using effective field theory. The momentum dependence of the anapole form factor is different from that of the matrix element of the strange currents in the…

核理论 · 物理学 2009-10-31 Martin J. Savage , Roxanne P. Springer

In this paper we consider some new classical effects obtained for a planar electrodynamics with the presence of a higher order derivatives term. The model can be interpreted as a kind of extension for the $3d$ Maxwell-Chern-Simons…

高能物理 - 理论 · 物理学 2022-01-12 L. H. C. Borges , F. A. Barone , H. L. Oliveira

Quantum polarization effects associated with the conformal anomaly in a static magnetic field background may generate a transverse electric current in the vacuum. The current may be produced either in an unbounded curved spacetime or in a…

高能物理 - 理论 · 物理学 2019-01-09 M. N. Chernodub , V. A. Goy , A. V. Molochkov

The simulation of field electron emission from arrays of micrometer-long open-ended (5, 5) carbon nanotubes is performed in the framework of quantum theory of many electrons. It is found that the applied external field is strongly screened…

材料科学 · 物理学 2009-11-13 Guihua Chen , Weiliang Wang , Jie Peng , Chunshan He , Shaozhi Deng , Ningsheng Xu , Zhibing Li

Point sources exhibit low threshold electron emission due to local field enhancement at the tip. The development and implementation of tip emitters have been hampered by the need to position them sufficiently apart to achieve field…

This paper presents an elementary, approximate analytical treatment of cold field electron emission (CFE) from a classical nanowall. A simple model is used to bring out some of the basic physics of a class of field emitter where quantum…

介观与纳米尺度物理 · 物理学 2012-09-05 Xizhou Qin , Weiliang Wang , Ningsheng Xu , Zhibing Li , Richard G. Forbes

We present an approach which allows the consistent treatment of bound states in the context of the dc conductivity in dense partially ionized noble gas plasmas. Besides electron-ion and electron-electron collisions, further collision…

等离子体物理 · 物理学 2017-08-02 Sebastian Rosmej , Heidi Reinholz , Gerd Röpke

By expressing the discrete Schrodinger equation as a second-order finite-difference equation with constant coefficients, the renormalization equations for substituted benzene dimers are derived via the c_n-coefficient elimination procedure.…

介观与纳米尺度物理 · 物理学 2016-08-09 Sydney G. Davison , Kenneth W. Sulston

We provide an analytical solution to study the near field optical effect of a core-shell nanostructure in proximity to a flat surface, within quasi-static approximation. The distribution of electrostatic potential and field enhancement in…

介观与纳米尺度物理 · 物理学 2014-01-30 Wenping Cui , Mingda Li , Zuyang Dai , Qingping Meng , Yimei Zhu

Combining the quantum optical properties of single-photon emitters with the strong near-field interactions available in nanophotonic and plasmonic systems is a powerful way of creating quantum manipulation and metrological functionalities.…

The possibility of electron beam guiding is theoretically explored on the surface of a topological insulator through the proximity interaction with a magnetic material. The electronic band modification induced by the exchange coupling at…

介观与纳米尺度物理 · 物理学 2015-06-17 Xiaodong Li , Ki Wook Kim

We study the propagation of charm quarks in the early stage of high energy proton-lead collision, considering the interaction of these quarks with the evolving Glasma by means of the Wong equations. Neglecting quantum fluctuations at the…

核理论 · 物理学 2018-12-05 Marco Ruggieri , Santosh K. Das