Metal-insulator transitions
Metal-insulator transitions
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DOI：
10.1351/pac198052010065
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发表时间：
1980
影响因子：
1.8
通讯作者：
N. Mott
中科院分区：
文献类型：
--
作者：
N. Mott
讨论了几种金属-绝缘体转变。在非晶态系统中，二级“安德森”转变可以在不考虑电子-电子相互作用的情况下描述。在晶体系统中，我们描述了带交叉跃迁和“莫特”跃迁，当包括电子-电子相互作用时，这两种跃迁都应该表现出载流子数的不连续性。强调了直接观察这一点的困难。系统中的充分无序将消除不连续性。流体铯、金属氨和膨胀流体汞与Si：P进行对比。过渡金属Ti 2 O的一些晶体化合物，VU_2、V_（03）、Ni_（52）和Ni_（15）四种化合物，其作用机理各不相同。对Ti_2O_3提出了新的建议。另一种类型的过渡是简要提及，在Fe 3 O 4的Verwey转变。
Several kinds of metal—insulator transitions are discussed. In non—crystalline systems a second order "Anderson" transition can be described without considering electron—electron interaction. In crystalline systems, we describe band—crossing transitions and "Mott" transitions, both of which shoulc show a discontinuity in the number of carriers when electron—electron interaction is included. The difficulty of observing this directly is stressed. Sufficient disorder in the system will remove the discontinuity. Fluid caesium, metal—ammonia and expanded fluid mercury are contrasted with Si:P. Some crystalline compounds of transition metals Ti2O., VU2, V03, Ni52 and NiS are described, each of which seems to involve is own ditferent mechanism. A new suggestion is made for Ti2O3. One other kind of transition is briefly mentioned, the Verwey transitions in Fe3O4.