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arXiv 0704.1499cond-mat.mtrl-sci
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多组分透明导电氧化物中电子有效质量的平均化

Averaging of the electron effective mass in multicomponent transparent conducting oxides

J. E. Medvedeva

摘要:

我们发现由具有$s^2$电子构型的阳离子的各种氧化物组成的层状材料,$XY_2$ O $_4$,$X$ =In或Sc,$Y$ =Ga,Zn,Al,Cd和/或Mg,表现出各向同性的电子有效质量,其可以通过对相应的单阳离子氧化物组分的电子有效质量进行平均来获得。这种效应是由于由{ \it all}阳离子的s态和氧p态形成的导带的混合性质。此外,所观察到的不敏感性的电子有效质量的氧配位和扭曲的阳离子-氧链表明,类似的行为可以预期在技术上重要的非晶态。这些发现大大拓宽了作为高效透明导体主体的材料范围。

英文摘要:

We find that layered materials composed of various oxides of cations with $s^2$ electronic configuration, $XY_2$O$_4$, $X$=In or Sc, $Y$=Ga, Zn, Al, Cd and/or Mg, exhibit isotropic electron effective mass which can be obtained via averaging over those of the corresponding single-cation oxide constituents. This effect is due to a hybrid nature of the conduction band formed from the s-states of {\it all} cations and the oxygen p-states. Moreover, the observed insensitivity of the electron effective mass to the oxygen coordination and to the distortions in the cation-oxygen chains suggests that similar behavior can be expected in technologically important amorphous state. These findings significantly broaden the range of materials as efficient transparent conductor hosts.

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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