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arXiv 1209.2845cond-mat.mtrl-sci
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钙钛矿型Ba(Sr)SnO3高导电性的成因

Origin of the Superior Conductivity of Perovskite Ba(Sr)SnO3

Heng-Rui Liu, Ji-Hui Yang, H. J. Xiang, X. G. Gong, Su-Huai Wei

摘要:

AsnO 3(A=Ba,Sr)是独特的钙钛矿氧化物,尽管它们具有宽的光学带隙,但它们具有优异的电子导电性。利用第一性原理能带结构计算,我们发现AsnO 3的电子有效质量小,因此,良好的电子导电性可以归因于在这个系统中的大尺寸的Sn,使导带边与反键Sn和Os字符.此外,我们表明,AsnO 3可以很容易地掺杂的浅LaA(+/0)施主能级的La。因此,我们的研究结果解释了为什么钙钛矿BaSnO 3,SrSnO 3,和它们的合金是有前途的候选人的透明导电氧化物。

英文摘要:

ASnO3 (A=Ba, Sr) are unique perovskite oxides in that they have superior electron conductivity despite their wide optical band gaps. Using first-principles band structure calculations, we show that the small electron effective masses, thus, good electron conductivity of ASnO3 can be attributed to the large size of Sn in this system that gives the conduction band edge with antibonding Sn and O s characters. Moreover, we show that ASnO3 can be easily doped by La with shallow LaA(+/0) donor level. Our results, therefore, explained why the perovskite BaSnO3, SrSnO3, and their alloys are promising candidates for transparent conducting oxides.

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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