Role of the intraatomic coulomb correlations on the energy of cohesion in narrow band metals

On the intraatomic Coulomb and exchange energies in degenerate narrow bands

Investigation of electron correlation effects in armchair silicene nanoribbons

In this study, the electronic structure of armchair silicene nanoribbons (ASiNRs) is investigated for various widths using first-principle calculations and the framework of the density functional theory. Electronic structure of ASiNRs shows a direct band gap which is decreased  with increasing the nanoribbon's width, showing an oscillatory behavior. The effective Coulomb interaction between loca...

The simultaneous effect of 3d impurities of transition metals and oxygen vacancy defect on TiO2 anatase and rutile

In this work, the formation of oxygen-vacancy defect in 3d metals-doped TiO2 anatase and rutile structures is first investigated. The systematic calculations of formation energy, crystalline stability, band structure and density of state (DOS) of TiO2 samples of anatase and rutile doped with 3d transition metals with and without oxygen defect is done using FHI-aims as a software package based o...

The effect of narrow band UVB on serum levels of folate: Trial on patients with dermatologic disorders

Folate plays an important role in metabolism and its deficiency can lead to cardiovascular problems or carcinogenesis. Some studies show that narrow band UVB (NBUVB) causes folate deficiency by photolysis , while others have different opinions or even the contrary. With regard to paradoxes in this context, we decided to study the effect of NBUVB on folate levels in patients with dermatologic di...

Evaluation of Efficacy and Safety of Combination of Narrow Band Ultraviolet B and Topical Calcipotriol Versus Narrow Band UVB alone in the Treatment of Vitiligo

Background: Narrow band Ultraviolet B (NBUVB) has been used successfully for the treatment of vitiligo. Recently, topical calcipotriol has also been used as immunotherapy or as a part of combination therapies. The aim of this study was to compare the clinical efficacy and safety of NBUVB and NBUVB plus topical calcipotriol in the treatment of generalized vitiligo.Methods: NBUVB phototherapy was...