Percolation conductivity in hafnium sub-oxides

Autor:	Islamov, D. R., Gritsenko, V. A., Cheng, C. H., Chin, A.
Rok vydání:	2014
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Appl. Phys. Lett. 105 (2014) 262903
Druh dokumentu:	Working Paper
DOI:	10.1063/1.4905308
Popis:	In this study, we demonstrated experimentally that formation of chains and islands of oxygen vacancies in hafnium sub-oxides (HfO$_x$, $x<2$) leads to percolation charge transport in such dielectrics. Basing on the model of \'{E}fros-Shklovskii percolation theory good quantitative agreement between the experimental and theoretical data of current-voltage characteristics were achieved. Based on the percolation theory suggested model shows that hafnium sub-oxides consist of mixtures of metallic Hf nanoscale clusters of 1-2 nm distributed onto non-stoichiometric HfO$_x$. It was shown that reported approach might describe low resistance state current-voltage characteristics of resistive memory elements based on HfO$_x$. Comment: 3 pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1412.4478 Zobrazit plný text záznamu View this record from Arxiv