Since the evolution of high temperature superconductors in cuprate systems, lanthanum copper oxide and related compounds having K2NiF4 structure appear as model materials for studying superconductivity phenomena owing to their simple structure and formulation.
Researchers have undertaken a practical and deceptively simple approach to slowing down light, using similar materials to those found in LCD screens.
By G.P. Thomas
15 Aug 2013
Thallium bromide is a chemical compound whose crystalline structure is of cubic CsCl type at room temperature. However, the structure transforms into orthorhombic thallium iodide type upon cooling. It exhibits semiconductor properties in an ultra-pure state.
Cadmium zinc telluride is an alloy of zinc telluride and cadmium telluride. It has a high electro-optic coefficient and transparency in the mid-infrared region.
Gallium arsenide phosphide is a semiconductor material and an alloy of gallium phosphide and gallium arsenide. It exists in various composition ratios denoted by x in its formula.
It has long been thought that ‘wonder material’ graphene will eventually herald a manufacturing revolution in the electronics and photonics industries. Yet these hopes are currently still purely theoretical. Now a surprising twist may show why this revolution has yet to come to fruition.
By G.P. Thomas
14 Aug 2013
Indium gallium aluminum nitride is generally prepared by epitaxial methods like pulsed-laser deposition, molecular beam epitaxy, etc. Addition of indium to the gallium nitride to form the light-emitting layer leads to the emission of ultraviolet and visible lights.
Iron disulfide is a chemical compound with the chemical formula FeS2. It has a cubic structure which is among the first crystal structures solved by X-ray diffraction.
Aluminum arsenide is a semiconductor material that has almost the same lattice constant as that of gallium arsenide. It can form a superlattice with gallium arsenide which results in its semiconductor properties.
Metal matrix composites (MMCs) are composite materials containing at least two constituent parts – a metal part and a material or a different metal part.