3 papers
cond-mat.str-el2020
From hidden metal-insulator transition to Planckian-like dissipation by tuning disorder in a nickelate
Qikai Guo, Beatriz Noheda
Heavily oxygen deficient NdNiO (NNO) films, which are insulating due to electron localization, contain pristine regions that undergo a hidden metal-insulator transition. Increa…
cond-mat.mtrl-sci2020
Guidelines for the stabilization of a polar rhombohedral phase in epitaxial Hf0.5Zr0.5O2 thin films
Pavan Nukala, Yingfen Wei, Vincent de Haas +3
The unconventional Si-compatible ferroelectricity in hafnia-based systems, which becomes robust only at nanoscopic sizes, has attracted a lot of interest. While a metastable polar…
cond-mat.str-el2019
Tunable resistivity exponents in the metallic phase of epitaxial nickelates
Qikai Guo, Saeedeh Farokhipoor, César Magén +2
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 t…