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arXiv 1802.01028cond-mat.mtrl-sci
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压力下Sr3SnO的结构、弹性、光电和输运性质

Structural, elastic, optoelectronic and transport properties of Sr3SnO under pressure

Enamul Haque, M. Anwar Hossain

摘要:

本文用第一性原理方法研究了Sr_3SnO在压力下的结构、弹性、光电和输运性质。流体静压的作用导致Sr(5s)轨道向Sn(5 p)和O(2 p)轨道的电荷转移。压力下Pughs比的增加趋势表明材料在高压下趋于韧性。在14 GPa下发生超导-金属转变,费米能级的态密度在此压力下显著增加。Sr 3SnO的折射率、光学电导率和吸收率已经被发现是高的并且与用于光伏的典型材料的折射率、光学电导率和吸收率相当。材料从12 GPa开始转变为n型,Hall系数也证实了这一点,在12 GPa时获得了较大的Seebeck系数。因此,Sr 3SnO是一种具有p型和n型性质的潜在热电材料。在压力下这些变化的详细物理过程已经在现有的理论中得到了解释。

英文摘要:

We have presented the structural, elastic, optoelectronic and transport properties of Sr3SnO under pressure by using first principles method. The application of hydrostatic pressure causes charge transfer from Sr(5s) orbital to Sn(5p) and O(2p) orbitals. The increasing trend of Pughs ratio under pressure implies that the material tends to be ductile at high pressure. The semiconductor-metal transition occurs at 14 GPa and the density of states at the Fermi level is significantly increased at this pressure. The refractive index, optical conductivity, and absorption of Sr3SnO have been found to be high and comparable to that for typical materials used in photovoltaic. The material becomes n-type from 12 GPa and Hall coefficient also confirm it. Large Seebeck coefficient obtained at 12 GPa. Thus, Sr3SnO is a potential thermoelectric material possessing both p- and n-type nature. The detail physics of these changes under pressure has been explained within the available theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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