نتایج جستجو برای: density of states

تعداد نتایج: 21228560  

Journal: :Physical Review Letters 2010

Journal: :journal of physical and theoretical chemistry 0
neda ahmadinejad young research arezoo tahan 2semnan branch, islamic azad university, semnan, iran mostafa talebi tari1 young researchers and elite club, yadegar-e-imam khomeini(rah) , shahr-e-rey- branch, islamic azad university, tehran, iran

abstractl density functional theory (dft) was used to investigate the effects of intra-moecular interactions and implicit water molecules on the relative stability and the nmr shielding tensors of hallucinogenic harmine in the monomeric and dimeric states. results represented that the relative stability and the nmr shielding tensors are dependent on the resonance interactions and chemical envir...

حسن ربانی, , فاطمه آقابابایی, , محمد مردانی, ,

In this paper, we investigate the electrical conductance and density of states of a nanocrystal including an electrical charge or dipole located at cross section of nanocrystal by using Green’s function method in the nearest neighbor tight-binding approach. The results show that moving the electrical charge from center to the edge of the nanocrystal increases the system transmission coefficient...

صالحی, سیدمحمدعلی, فضیله, فرهاد, قربانی‌زواره, مهدیه, معقول, زهره, میرزا, بهروز,

In the present paper, we calculate the effect of disorder on the density of states and localization of eigenstates of zigzag and armchair nano-ribbons. Both Anderson disorder model and quantom percolation are considered. The eigenstates of the disordered hamiltonian is calculated in a tight–binding approximation and the localization of eigenstates are characterized using the inverse participati...

Journal: :journal of physical and theoretical chemistry 0
mansoureh pashangpour department of physics, islamshahr branch, islamic azad university, islamshahr, iran vahid ghaffari central tehran branch, islamic azad university, tehran, iran

we have investigated structure and electronic properties of au and si liner chains using the firstprinciplesplane wave pseudopotential method. the transport properties and conductance of these twoliner chains are studied using landauer approaches based on density functional theory (dft). weobtain density of states and band gap using kohn-sham and wannier functions as well as quantumconductivity...

Journal: :Physical Review Letters 2008

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