| Autor: |
Guo, Qikai, Farokhipoor, Saeedeh, Magén, César, Rivadulla, Francisco, Noheda, Beatriz |
| Předmět: |
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| Zdroj: |
Nature Communications; 6/11/2020, Vol. 11 Issue 1, p1-9, 9p |
| Abstrakt: |
We report a detailed analysis of the electrical resistivity exponent of thin films of NdNiO3 as a function of epitaxial strain. Thin films under low strain conditions show a linear dependence of the resistivity versus 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. Strong electronic correlations in rare-earth nickelates make them prone to unconventional behaviour but extrinsic effects hamper the interpretation of data. Guo et al. show that apparent non-Fermi liquid transport in NdNiO3 is tuned by strain and disorder, suggesting a more conventional origin. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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