Electronic structure and its external electric field modulation of PbPdO2 ultrathin slabs with (002) and (211) preferred orientations

Yanmin Yang; Kehua Zhong; Guigui Xu; Jian-Min Zhang; Zhigao Huang

doi:10.1038/s41598-017-07212-w

Electronic structure and its external electric field modulation of PbPdO₂ ultrathin slabs with (002) and (211) preferred orientations

Sci Rep. 2017 Jul 31;7(1):6898. doi: 10.1038/s41598-017-07212-w.

Authors

Yanmin Yang^{1

2}, Kehua Zhong^{1

2}, Guigui Xu^{1

2}, Jian-Min Zhang^{3

4}, Zhigao Huang^{5

6}

Affiliations

¹ Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou, 350117, China.
² Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen, 361005, China.
³ Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou, 350117, China. jmzhang@fjnu.edu.cn.
⁴ Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen, 361005, China. jmzhang@fjnu.edu.cn.
⁵ Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou, 350117, China. zghuang@fjnu.edu.cn.
⁶ Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen, 361005, China. zghuang@fjnu.edu.cn.

Abstract

The Electronic structure of PbPdO₂ with (002) and (211) preferred orientations were investigated using first-principles calculation. The calculated results indicate that, (002) and (211) orientations exhibit different electric field dependence of band-gap and carrier concentration. The small band gap and more sensitive electric field modulation of band gap were found in (002) orientation. Moreover, the electric field modulation of the resistivity up to 3-4 orders of magnitude is also observed in (002) slab, which reveals that origin of colossal electroresistance. Lastly, electric field modulation of band gap is well explained. This work should be significant for repeating the colossal electroresistance.

Publication types

Research Support, Non-U.S. Gov't