The dependences of the lattice structure and surface morphology of SiGe/graded buffer/Si(1 1 0) heterostructures on substrate temperature during gas-source molecular beam epitaxy (MBE) were investigated by X-ray diffraction (XRD) measurement and atomic force microscopy (AFM). Structural features...
In this paper we present the first investigation on the lattice structure of nanophases, α-Fe(Si) and Fe2B, in nanostructured Fe Cu Si B alloys obtained via crystallization of the parent amorphous alloy. It is found that the lattice constant of α-Fe(Si) phase is increased, whereas the...
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as itsunit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of th...
We report a bond-charge-model calculation for Si(111):H(1×1). This configuration may be assumed to represent the "ideal" (1×1) surface, as long as the saturation of the dangling bonds by H atoms produces a slight perturbation of the dynamical matrix. We display also the geometric fol...
Compression of a magnetic material leads to a change in its magnetic properties. We examine this effect using spin-lattice dynamics for the special case of bcc-Fe, using both single- and poly-crystalline Fe and a bicontinuous nanofoam structure. We find that during the elastic phase of compres...
A two-dimensional growth mode was maintained during growth of all the layers. It was confirmed that the QW structure was lattice-matched to the Si substrate from the lattice constant measured by x-ray diffraction. A cross-sectional image taken by transmission electron microscopy revealed that no ...
The substrate temperature is elevated to 650 °C and the a Si epitaxial layer is formed by the same steps as those for the formation of the former Si epitaxial layer. The epitaxial step is repeatedly performed similarly, thereby forming a Si/SiGe super lattice structure....
Si 的能带结构 commons.wikimedia.org/w 本讲目的:认知能带结构 什么是能带结构?有何特征? 通过空晶格模型的能带结构及其微扰法修正,就可以知道看上去非常复杂的、令人生畏的能带结构,实际上并不那么复杂,是有一定特征的。 能带? 能隙? 第15 讲、空晶格模型 $$\to$$ 能带概念和特征 1、空晶格模型 一维情况...
Si/Ge Superlattice Structures for Thermoelectric Power Generation In addition, data will be presented that shows the lowering of thermal conductivity by the superlattice structure with nearly a 5x reduction in lattice thermal conductivity compared to the alloy film. Initial thin-film power device results...
The increasing demand for a wider access to additive manufacturing technologies is driving the production of metal lattice structure with powder bed fusion