納米自旋電子材料與器件團隊
—— since 2011

張保敏副教授在Physical review B上發表學術論文《2p-insulator heterointerfaces: Creation of half-metallicity and ani》

恭喜我院副教授張保敏與格羅甯根大學教授Dr. Blake,武漢大學教授Shenjun Yuan,北京師範大學教授 Zhe Yuan,甯波材料技術與工程研究所教授Zhicheng Zhong,香港城市大學Ruiqin Zhang一起共同合作發表了一篇學術論文于Physical review B上,論文題目為《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.

這項工作得到了山東省自然科學基金的支持,并獲得了ZR2016AB12和ZR2015AL020的資助,另外,曹崇龍副教授對這項工作也做出了重要貢獻。

論文鍊接: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.165109

   

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