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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >The science and technology of phase change materials
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The science and technology of phase change materials

机译：相变材料科学与技术

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Phase Change Materials are solids which are characterized by a unique combination of properties. They exist in an amorphous and a crystalline phase with remarkably different optical and electrical properties caused by an unusual change of bonding when the amorphous phase is crystallized. It is possible to change the phase of such a material in very short times (nanoseconds) and repeatedly between the two phases which makes phase change materials ideal candidates for data storage. This paper reviews in detail the relationship between the bonding mechanisms and the resulting physical properties of phase change materials. It describes the change of bonding from ordinary covalent bonding in the amorphous phase to resonance bonding in the crystalline phase with additional disorder, resulting in unconventional physical properties of phase change materials. These properties lead to the development of phase change data storage applications. Phase change optical data storage, phase change random access memory, and emerging applications including neuromorphic computing are described with particular emphasis on material requirements and material engineering for phase change random access memory.
机译：相变材料是具有独特性能组合的固体。它们存在于非晶态和结晶态中，由于非晶态晶化时键合的异常变化，光学和电学性质显着不同。可以在很短的时间内（纳秒）并在两个相位之间重复更改此类材料的相位，这使相变材料成为数据存储的理想候选者。本文详细回顾了键合机理与相变材料的物理性能之间的关系。它描述了键合从无定形相中的普通共价键到结晶相中的共振键的变化（具有额外的无序性），导致相变材料具有非常规的物理特性。这些属性导致相变数据存储应用程序的发展。描述了相变光学数据存储，相变随机存取存储器以及包括神经形态计算在内的新兴应用，其中特别强调了相变随机存取存储器的材料要求和材料工程。

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