张保敏副教授在Physical review B上发表学术论文《2p-insulator heterointerfaces: Creation of half-metallicity and ani》

恭喜我院副教授张保敏与格罗宁根大学教授Dr. Blake，武汉大学教授Shenjun Yuan，北京师范大学教授 Zhe Yuan，宁波材料技术与工程研究所教授Zhicheng Zhong，香港城市大学Ruiqin Zhang一起共同合作发表了一篇学术论文于Physical review B上，论文题目为《2p-insulator　heterointerfaces:　Creation of half-metallicity and anionogenic ferromagnetism via double exchange》。

Basedon density functional theory (DFT) calculations, we studied the heterointerfaces between an alkali superoxide AO2 (antiferromagnetic Mott insulator) and an alkaline earth peroxide AEO2 (non-magneticinsulator). We showed that the double exchange occurring between peroxide (O22−) and superoxide (O2−) anions is analogous to the situation involving Mn3+ and Mn4+ cations in the well studied La1-xSrxMnO3 series. Whereas sharp heterointerfaces are predicted to be semiconducting, heterointerfaces with a moderate concentration of swapped K and Ba atoms is half-metallic and ferromagnetic, due to the double exchange mechanism. The swapped K and Ba atoms renders the interfacial K-O and Ba-O atomic layer selectron-doped or hole-doped, enhancing the degree of double exchange at the interface and promoting the half-metallic and ferromagnetic state. Our finding spave the way toward realizing metallicity and ferromagnetism at the interface between two 2p insulators, and such systems can constitute a new family of hetero structures with novel properties, expanding studies on heterointerfaces from 3d-insulators to 2p-insulators.

这项工作得到了山东省自然科学基金的支持，并获得了ZR2016AB12和ZR2015AL020的资助，另外，曹崇龙副教授对这项工作也做出了重要贡献。

论文链接: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.165109