Results 11 to 20 of about 840,187 (268)

Electronic structure of silicon [PDF]

Physical Review B, 1974
It is shown that a purely local-pseudopotential calculation is able to accurately reproduce the major optical gaps and cyclotron masses. However, deviations from the experimental results become manifest in photoemission and x-ray charge-density results as we extend our calculations to the lower valence bands.
Chelikowsky, James R., Cohen, Marvin L.
openaire   +2 more sources

Spin and electron structure [PDF]

Physics Letters B, 1993
The recent literature shows a renewed interest, with various independent approaches, in the classical models for spin. Considering the possible interest of those results, at least for the electron case, we purpose in this paper to explore their physical and mathematical meaning, by the natural and powerful language of Clifford algebras (which ...
PAVSIC M, RECAMI E, RODRIGUES W. A. JR, MACCARRONE G. D, RACITI, Fabio, SALESI G.   +5 more
openaire   +4 more sources

Design and Optimization of a Micron-Scale Magnetoelectric Antenna Based on Acoustic Excitation

Micromachines, 2022
The development of antenna miniaturization technology is limited by the principle of electromagnetic radiation. In this paper, the structure size of the antenna is reduced by nearly two orders of magnitude by using Acoustic excitation instead of ...
Na Li, Xiangyang Li, Bonan Xu, Bin Zheng, Pengchao Zhao   +4 more
doaj   +1 more source

Investigations on the Bragg grating recording in all-silica, standard and microstructured optical fibers using 248 nm, 5 ps laser radiation [PDF]

Journal of the European Optical Society-Rapid Publications, 2009
The fabrication of Bragg reflectors in hydrogenated, all-silica, fluorine cladding depressed and microstructured optical fibers using 248 nm, 5 ps laser radiation, is investigated here.
Pissadakis S., Livitziis M., Tsibidis G. D.   +2 more
doaj   +1 more source

Multiple-Beam Steering Using Graphene-Based Coding Metasurfaces

Micromachines, 2023
Recently, the coding metasurface has gained significant attention due to its exceptional potential in controlling electromagnetic (EM) waves with the rapid development of wireless communication systems.
Bin Zheng, Xin Rao, Yuyu Shan, Chuandong Yu, Jingke Zhang, Na Li   +5 more
doaj   +1 more source

Listening to laser light interactions with objects of art: a novel photoacoustic approach for diagnosis and monitoring of laser cleaning interventions

Heritage Science, 2020
Photoacoustic (PA) imaging is a novel, rapidly expanding diagnostic technique, which has been predominately developed in the context of contemporary biomedical research studies.
George J. Tserevelakis, Paraskevi Pouli, Giannis Zacharakis   +2 more
doaj   +1 more source

Electronic structure of MnSi: The role of electron-electron interactions

Physical Review B, 2006
We present an experimental study of the electronic structure of MnSi. Using x-ray absorption spectroscopy XAS, x-ray photoemission, and x-ray fluorescence, we provide experimental evidence that MnSi has a mixed valence ground state. We show that self-consistent local density approximation supercell calculations cannot replicate the XAS spectra of MnSi,
Carbone F, Zangrando M, Brinkman A, Nicolaou A, Bondino F, Magnano E, Nugroho AA, Parmigiani F, Jarlborg T, van der Marel D   +9 more
openaire   +3 more sources

Electron–electron and electron–hole pairing in graphene structures [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2010
The superconducting pairing of electrons in doped graphene owing to in-plane and out-of-plane phonons is considered. It is shown that the structure of the order parameter in the valley space substantially affects conditions of the pairing. Electron–hole pairing in a graphene bilayer in the strong coupling regime is also considered.
Lozovik, Yu. E., Ogarkov, S. L., Sokolik, A. A.   +2 more
openaire   +3 more sources

A Reverse-Design Strategy for the Track Error of the Qi Tai Telescope Based on Pointing Accuracy

Engineering, 2022
The Qi Tai Telescope (QTT), which has a 110 m aperture, is planned to be the largest scale steerable telescope in the world. Ideally, the telescope’s repeated pointing accuracy error should be less than 2.5 arc seconds (arcsec); thus, the telescope ...
Na Li, Baoyan Duan, Xiangyang Li, Bin Zheng, Jiang Wu   +4 more
doaj   +1 more source

The Driving Waveform Design Method of Power-Law Fluid Piezoelectric Printing Based on Iterative Learning Control

Sensors, 2022
In some applications of piezoelectric three-dimensional inkjet printing, the materials used are power-law fluids as they are shear thinning. Their time-varying viscosities affect the droplet formation, which is determined by the volume flow rate at the ...
Ju Peng, Jin Huang, Jianjun Wang, Fanbo Meng, Hongxiao Gong, Bu Ping   +5 more
doaj   +1 more source