The ever increasing demand for energy has necessitated the need of coming up with measures of seeking alternative energy sources. Solar energy is one of the most important alternative sources of energy. The use of the first and second generations solar cells made of silicon in making solar panels has notable shortcomings such as unaffordability and lack of longevity of the electric power...
Berry phase is a quantity that describes how a global phase accumulates as some complex vector is carried around a closed loop in a complex vector space.
Berry phase and related concept, usually provide a unified framework for describing many fundamental
properties of electrons in solids. By this we imply from electric polarization to quantized effects in topological materials. Tantalum...
Abstract
Availability of high accuracy time-series solar radiation data is of primary importance in the prediction of energy produced by solar energy conversion devices. Since performance of any solar energy system is site-dependent, it is beneficial if local operating conditions are known at the planning stage. Unfortunatîely, ground-based measurements of solar radiation are lacking in most...
Jahn-Teller effects arise in a crystal if distortions are considered on either the octahedral or tetrahedra complexes. This is a non-volatile approach in tailoring materials properties. ScF$_3$ is a material that has arouse special interests based on its Negative thermal expansion (NTE) behaviour. To this date, little is understood on the interplay between Jahn-Teller effects and NTE. The...
Research has shown that about 80% of total cost of poultry production is incurred on poultry feeds. A farmer who manages to bring down this cost to about 60% to 50% will make good returns in the poultry business. In general the main objective of a firm is to maximize production thereby a good measure must be taken in formulating ration for poultry birds (chicks , broiler starter, broiler...
The phenomena of superfluidity was first observed in liquid Helium by Kapitza in 1938. Superfluidity is the friction less flow of atoms or molecules without dissipation at very low temperatures. There is a critical temperature below which the assembly of interacting particles , bosons , or fermions , or a mixture of bosons and fermions becomes superfluid leading to a phase transition from the...
In this paper, the structural and electronic properties of ATiO3 (A=Ca, Sr, Ba) have been investigated under the strain-free situation and realistic constraints using first-principles calculations. We endeavored to find out the relationship between the interplay between lattice distortions and bandgap in three ATiO3 family members that has remained skeptical to date. The simulations were done...