High-Pressure Electrical-Transport Properties of SnS: Experimental and Theoretical Approaches

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• 作者：Feng Ke ; Jie Yang ; Cailong Liu ; Qinglin Wang ; Yuqiang Li ; Junkai Zhang ; Lei Wu ; Xin Zhang ; Yonghao Han ; Baojia Wu ; Yanzhang Ma ; Chunxiao Gao
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：March 28, 2013
• 年：2013
• 卷：117
• 期：12
• 页码：6033-6038
• 全文大小：430K
• 年卷期：v.117,no.12(March 28, 2013)
• ISSN：1932-7455

文摘

The electrical transport behavior of SnS under high pressure has been investigated by the temperature dependence of electrical resistivity measurement, the in situ Hall-effect measurement, and the first-principle calculation. The experimental results show that SnS undergoes a semiconductor to semimetal transition at 10.3 GPa, and this transition is further substantiated by the band-structure calculation. The total and partial density of states predict that the semimetal character of SnS is attributed to the enhanced coupling of Sn-5s, Sn-5p, and S-3p states with application of pressure. In addition, dramatic changes in electrical transport parameters such as the electrical resistivity, the carrier concentration, and the carrier mobility are observed at 12.6 GPa, which are correlated to the pressure-induced Pnma-Cmcm structural phase transition.