搜索结果: 1-15 共查到“知识库 物理学 Te”相关记录28条 . 查询时间(0.055 秒)
二维BX(X=S,Se,Te)结构预测与性质的第一性原理研究
结构预测 电子结构 力学性质 载流子迁移率
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2022/3/28
采用基于粒子群优化算法的结构预测程序CALYPSO结合密度泛函理论的VASP软件包，预测得到二维BX(X=S、Se、Te)的最低能量结构，该结构是由B和X原子形成的双层褶皱的六角密堆积结构，层与层之间较强的B-B键是稳定结构的关键．凝聚能和声子谱计算结果表明二维BX(X=S、Se、Te)在热力学和动力学上均是稳定的．能带结构和电子态密度的计算分析发现三种二维材料均呈现间接带隙半导体行为，带隙分别为...
The Hartman paradox and new model of scattering the plane TE polarized light wave on a dielectric layer
optical analogue of the Hartman paradox time and velocity of tunneling the light energy layered structure FTIR
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2011/8/4
Abstract: The problem of describing the temporal aspects of scattering the plane light wave on an uniform dielectric layer is reconsidered. In the standard model of this scattering process a correct d...
Coupled-wave model for square-lattice photonic-crystal lasers with TE polarization -- a general approach
Coupled-wave model square-lattice photonic-crystal lasers TE polarization
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2011/8/3
Abstract: A general coupled-wave model is presented for square-lattice photonic crystal (PC) lasers with transverse-electric polarization. This model incorporates the high-order coupling effects that ...
常压下Se和Te电子结构和弹性性质的第一性原理计算
第一性原理计算 能带结构 弹性系数 德拜温度
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2012/11/14
利用基于密度泛函的第一性原理, 计算ⅥA族元素Se和Te在常压下的能带结构、 电子态密度、 弹性系数和德拜温度. 能带结构和电子态密度的计算结果表明: Se为间接带隙半导体, Se费米面附近的导带和价带主要来自外层4p4电子的贡献, 4s2电子对费米面附近的导带和价带贡献较少; Te为直接带隙半导体, Te费米面附近的导带和价带主要来自外层5p4电子的贡献, 5s2电子对费米面附近的导带和价带贡...
Evaluation of Compton scattering sequence reconstruction algorithms for a portable position sensitive radioactivity detector based on pixelated Cd(Zn)Te crystals
Evaluation of Compton scattering sequence reconstruction algorithms a portable position sensitive radioactivity detector based on pixelated Cd(Zn)Te crystals
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2011/1/4
We present extensive simulation studies on the performance of algorithms for the Compton sequence reconstruction used for the development of a portable spectroscopic instrument (COCAE), with the capab...
Temperature-dependent chirped coherent phonon dynamics in Bi$_{2}$Te$_{3}$ using high intensity femtosecond laser pulses
Temperature-dependent chirped coherent phonon dynamics femtosecond laser pulses
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2010/11/18
Degenerate pump-probe reflectivity experiments have been performed on a single crystal of
bismuth telluride (Bi2Te3) as a function of sample temperature (3K to 296K) and pump intensity
using ∼...
Effect of p-d hybridization and structural distortion on the electronic properties of AgAlM2 (M = S, Se, Te) chalcopyrite semiconductors
A. Chalcopyrite A. Semiconductors E. Density Functional Theory E. TB-LMTO
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2010/11/18
We have carried out ab-initio calculation and study of structural and elec-tronic properties of AgAlM2 (M = S, Se, Te) chalcopyrite semiconductors using Density Functional Theory (DFT) based self cons...
Demonstration of high-Q TE-TM photonic crystal nanobeam cavities
high-Q TE-TM photonic crystal nanobeam cavities Physics
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2010/11/16
We experimentally demonstrate high Quality factor dual-polarized TE-TM photonic crystal nanobeam cavities. The free-standing nanobeams are fabricated in a 500 nm thick silicon layer, and are probed u...
Evaluation of Compton scattering sequence reconstruction algorithms for a portable position sensitive radioactivity detector based on pixelated Cd(Zn)Te crystals
Compton scattering sequence algorithms radioactivity detector
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2010/11/17
We present extensive simulation studies on the performance of algorithms for the Compton sequence reconstruction used for the development of a portable spectroscopic instrument (COCAE), with the capa...
Méthodes quasi-statiques pour la simulation numérique discrète des assemblages granulaires
Méthodes quasi-statiques simulation numérique discrète assemblages granulaires
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2010/11/19
Le présent document constitue le chapitre 3 du traitéModélisation numérique discrète des matériaux granulaires, ouvrage collectif, sous la direction de Farhang Radjaï et Frédéric
Dubois, publié ...
Spin waves in the $(\pi,0)$ magnetically ordered iron chalcogenide Fe$_{1.05}$Te
Spin waves
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2010/11/22
We use inelastic neutron scattering to show that the spin waves in the iron chalcogenide Fe1.05Te display novel dispersion clearly different from those in the related iron pnictide systems. By fitting...
Ultrafast dephasing of coherent optical phonons in atomically controlled GeTe/Sb$_{2}$Te$_{3}$ superlattices
Ultrafast dephasing of coherent optical phonons
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2010/11/23
Femtosecond dynamics of coherent optical phonons in GeTe/Sb2Te3 superlattices (SLs), a new
class of semiconductor SLs with three different states, have been investigated by using a reflectiontype pum...
Influences des paramètres micromécaniques dans la simulation numérique discrète des matériaux granulaires : assemblage, déformation quasi-statique, écoulements
Influences des paramètres numérique discrète des matériaux granulaires déformation quasi-statique, écoulements
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2010/11/18
Le présent document constitue le chapitre 8 du traitéModélisation numérique discrète des matériaux granulaires, ouvrage collectif, sous la direction de Farhang Radjaï et Frédéric
Dubois, publié ...
Ultrafast dephasing of coherent optical phonons in atomically controlled GeTe/Sb$_{2}$Te$_{3}$ superlattices
Ultrafast dephasing coherent optical phonons
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2010/11/18
Femtosecond dynamics of coherent optical phonons in GeTe/Sb$_{2}$Te$_{3}$ superlattices (SLs), a new class of semiconductor SLs with three different states, have been investigated by using a reflecti...
Mesure des risques de marché et de souscription vie en situation d'information incomplète pour un portefeuille de prévoyance
Embedded Value Cost of Residual Non Hedgeable risks (CRNHR) Time Value of Financial Options and Guarantees (TVFOG) individual protection
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2010/4/27
In the framework of Embedded Value new standards, namely the MCEV norms, the latest principles published in June 2008 address the issue of market and underwriting risks measurement by using stochastic...