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arXiv 1909.06256cond-mat.str-el
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外延镍酸盐金属相的可调电阻率指数

Tunable resistivity exponents in the metallic phase of epitaxial nickelates

Qikai Guo, Saeedeh Farokhipoor, César Magén, Francisco Rivadulla, Beatriz Noheda

摘要:

我们报告的电阻率指数的薄膜的NdNiO 3作为外延应变的函数的详细分析。无应变薄膜的电阻率与温度呈线性关系,这与电子-声子相互作用控制的经典费米气体一致。此外,表观温度指数n可以通过n= 1和n= 3之间的外延应变来调节。我们讨论了猝灭随机无序在n值中所起的关键作用。我们的工作表明,费米/非费米液体行为的实验获得的电阻率指数的基础上的分配需要在材料中的无序程度的深入分析。

英文摘要:

We report a detailed analysis of the electrical resistivity exponent of thin films of NdNiO3 as a function of epitaxial strain. Strain-free thin-films show a linear dependence of the resistivity vs temperature, consistent with a classical Fermi gas ruled by electron-phonon interactions. In addition, the apparent temperature exponent, n, can be tuned with the epitaxial strain between n= 1 and n= 3. We discuss the critical role played by quenched random disorder in the value of n. Our work shows that the assignment of Fermi/Non-Fermi liquid behaviour based on experimentally obtained resistivity exponents requires an in-depth analysis of the degree of disorder in the material.

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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