نتایج جستجو برای: quantum

تعداد نتایج: 296265  

تارقلی, احسان, صفی رحمانی‌فر, محمد, موسوی‌خوشدل, سید‌مرتضی,

In this study, quantum capacitance of graphene-based electrodes is evaluated using Density Functional Theory (DFT) calculations. The obtained results showed that quantum capacitance of graphene-based supercapacitors could be significantly improved by existence of structural defects on the graphene sheets at sufficiently high concentrations because of creating impure states resulted from carbon ...

مصدق, حمید, کشاورز, فرزانه,

In this study, the effect of four-spin exchanges between the nearest and next nearest neighbor spins of honeycomb lattice on the phase diagram of S=3/2 antiferomagnetic Heisenberg model is considered with two-spin exchanges between the nearest and next nearest neighbor spins. Firstly, the method is investigated with classical phase diagram. In classical phase diagram, in addition to Neel order,...

باغبانی‌ریزی, حامد, حسین‌خانی, حجت, طالبیان‌درزی, محمدعلی, عبدالهی, محسن,

 In this research, the effect of the uniform electric field on the ground-state of a centered hydrogenic donor impurity in a GaAs/AlAs spherical quantum dot was studied using infinite potential model. In presence of strong electric field, due to the stark effect (perturbing electric field), the ground state energy would increase linearly. In presence of weak electric fields, the normalized bind...

Journal: :iranian journal of astronomy and astrophysics 2014
nematollah riazi saeid davatolhagh hooman moradpour

using the usual definitions of information and entropy in quantum gravity and statistical mechanics and the existing views about the relation between information and complexity, we examine the evolution of complexity in an ever expanding universe.

Journal: :journal of physical & theoretical chemistry 2015
m. r. zardoost n. nami m. azimi

the ir and nmr spectra were coupled with quantum chemical calculations in dft approach usingthe hybrid b3lyp exchange-correlation functional to confirm the structure of 2-methoxycarbonyl-7-methyl-1,3-thiazino[3,2-b][1,2,4]triazine-4,8-dione 2d.

H. Hoseinkhani, M. A. Talebian Darzi M. Abdollahi

Interaction and correlation effects in quantum dots play a fundamental role in defining both their equilibrium and transport properties. Numerical methods are commonly employed to study such systems. In this paper we investigate the numerical calculation of quantum transport of electrons in spherical centered defect InGaAs/AlGaAs quantum dot (SCDQD). The simulation is based on the imaginary time...

This study aimed to determine the relation between quantum management skills and organizational agility capabilities with the mediating role of organizational intelligence. The method of research was a descriptive and correlational based on Structural Equation Modeling (SEM), and the statistical population consisting of all administrators from state universities of Isfahan in academic year 2015...

Journal: :international journal of nano dimension 0
j. jahanbin sardroodi molecular simulation lab., azarbaijan shahid madani university, tabriz, iran. s. afshari molecular simulation lab., azarbaijan shahid madani university, tabriz, iran. a. r. rastkar ebrahimzadeh molecular simulation lab., azarbaijan shahid madani university, tabriz, iran. m. abbasi molecular simulation lab., azarbaijan shahid madani university, tabriz, iran.

the quantum transport computations have been carried on four different width of zigzag graphene using a nonequilibrium green’s function method combined with density functional theory. the computed properties are included transmittance spectrum, electrical current and quantum conductance at the 0.3v as bias voltage.  the considered systems were composed from one-layer graphene sheets differing w...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده علوم 1387

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1387

چکیده ندارد.

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