二元合金环的磁输运
Magneto-transport in a binary alloy ring
摘要：
在单带非相互作用紧束缚框架下研究了二元合金环在Aharonov-Bohm（AB）磁通作用下的磁输运性质。在第一部分中，我们解析地揭示了孤立有序二元合金环中持续电流随电子浓度N_e和AB磁通量ε的变化规律。而在文章的第二部分中，我们讨论了通过二元合金环连接到两个半无限一维金属电极的电子输运性质。并分析了杂质的影响。通过我们的研究，我们提出，在适当选择的参数值的系统可以作为一个p型或n型半导体。
英文摘要：
Magneto-transport properties are investigated in a binary alloy ring subjected to an Aharonov-Bohm (AB) flux ϕwithin a single-band non-interacting tight-binding framework. In the first part, we expose analytically the behavior of persistent current in an isolated ordered binary alloy ring as functions of electron concentration N_e and AB flux ϕ. While, in the second part of the article, we discuss electron transport properties through a binary alloy ring attached to two semi-infinite one-dimensional metallic electrodes. The effect of impurities is also analyzed. From our study we propose that under suitable choices of the parameter values the system can act as a p-type or an n-type semiconductor.
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