Anomalous Quantum Transport Properties in Semimetallic Black Phosphorus
Anomalous Quantum Transport Properties in Semimetallic Black Phosphorus
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DOI：
10.7566/jpsj.84.073708
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发表时间：
2015-07-15
影响因子：
1.7
通讯作者：
Tokunaga, Masashi
中科院分区：
文献类型：
--
作者：
Akiba, Kazuto;Miyake, Astushi;Tokunaga, Masashi
研究了环境压力和静水压力下黑磷单晶的磁阻。在压力低于 0.71 GPa 的半导体状态下，磁阻表现出周期性振荡，这可以归因于磁声子共振，这是高迁移率半导体的特征。在高于 1.64 GPa 的半金属态下，横向和纵向磁阻均显示出相当大的增加，同时表现出叠加的 Shubnikov-de Haas 振荡。在半金属黑磷中观察到的小费米面、高迁移率和载流子的光有效质量与代表性元素半金属铋和石墨相当。
Magnetoresistance in single crystals of black phosphorus is studied at ambient and hydrostatic pressures. In the semiconducting states at pressures below 0.71 GPa, the magnetoresistance shows periodic oscillations, which can be ascribed to the magneto-phonon resonance that is characteristic of high-mobility semiconductors. In the semimetallic state above 1.64 GPa, both transverse and longitudinal magnetoresistances show a considerable increase while exhibiting superposed Shubnikov-de Haas oscillations. The observed small Fermi surfaces, high mobilities, and light effective masses of carriers in semimetallic black phosphorus are comparable to those in the representative elemental semimetals of bismuth and graphite.