Strain-mediated metal-insulator transition in epitaxial ultrathin films of NdNiO3

Jian Liu; Kareev, M.; Gray, B.; Kim, J. W.; Ryan, P.; Dabrowski, B.; Freeland, J. W.; Chakhalian, J.
June 2010
Applied Physics Letters;6/7/2010, Vol. 96 Issue 23, p233110
Academic Journal
We have synthesized epitaxial NdNiO3 ultrathin films in a layer-by-layer growth mode under tensile and compressive strain on SrTiO3 (001) and LaAlO3 (001), respectively. A combination of x-ray diffraction, temperature dependent resistivity, and soft x-ray absorption spectroscopy has been applied to elucidate electronic and structural properties of the samples. In contrast to the bulk NdNiO3, the metal-insulator transition under compressive strain is found to be completely quenched, while the transition remains under the tensile strain albeit modified from the bulk behavior.


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