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arXiv 1503.04555cond-mat.str-el
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衬底温度对钙钛矿SrIrO3薄膜中非费米液态金属-绝缘体转变的影响

Effects of substrate temperature on the unusual non-Fermi liquid metal to insulator transition in perovskite SrIrO3 thin films

Abhijit Biswas, Yoon Hee Jeong

摘要:

研究了在不同衬底温度下生长的强自旋轨道耦合钙钛矿SrIrO 3薄膜的电子输运性质。SrIrO 3薄膜的电子输运被发现是非常敏感的生长参数,特别是,该膜可以是金属或绝缘体取决于衬底生长温度。虽然所有的金属膜显示出不寻常的亚线性温度依赖性非费米液体行为的电阻率,绝缘膜在较高的温度下生长的脱颖而出,其不均匀的Ir分布,通过二次离子质谱分析。这一观察结果表明,不均匀分布的阳离子可以是影响电子输运的重元素基氧化物薄膜和异质结构的基本因素之一。

英文摘要:

Electronic transport has been investigated for strong spin-orbit coupled perovskite SrIrO3 thin films grown at various substrate temperatures. The electronic transport of the SrIrO3 films is found to be very sensitive to the growth parameters; in particular, the film can either be a metal or an insulator depending upon the substrate growth temperature. While all the metallic films show unusual sublinear temperature dependent non-Fermi liquid behaviors in resistivity, the insulating film grown at a higher temperature stands out for its inhomogeneous Ir distribution, as analyzed by secondary ion mass spectrometry. This observation demonstrates that the inhomogeneous distribution of cations can be one of the fundamental factors in affecting the electronic transport in heavy element based oxide films and heterostructures.

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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