2p -insulator heterointerfaces : Creation of half-metallicity and anionogenic ferromagnetism via double exchange

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Baomin Zhang
  • Chonglong Cao
  • Guowei Li
  • Feng Li
  • Weixiao Ji
  • Shufeng Zhang
  • Miaojuan Ren
  • Haikun Zhang
  • Zhicheng Zhong
  • Zhe Yuan
  • Shengjun Yuan
  • Graeme R. Blake

Detail(s)

Original languageEnglish
Article number165109
Journal / PublicationPhysical Review B
Volume97
Issue number16
Online published6 Apr 2018
Publication statusPublished - 15 Apr 2018

Abstract

We use first-principles calculations to predict the occurrence of half-metallicity and anionogenic ferromagnetism at the heterointerface between two 2p insulators, taking the KO2/BaO2 (001) interface as an example. Whereas a sharp heterointerface is semiconducting, a heterointerface with a moderate concentration of swapped K and Ba atoms is half-metallic and ferromagnetic at ambient pressure due to the double exchange mechanism. The K-Ba swap renders the interfacial K-O and Ba-O atomic layers electron-doped and hole-doped, respectively. Our findings pave the way to realize metallicity and ferromagnetism at the interface between two 2p insulators, and such systems can constitute a new family of heterostructures with novel properties, expanding studies on heterointerfaces from 3d insulators to 2p insulators.

Citation Format(s)

2p -insulator heterointerfaces : Creation of half-metallicity and anionogenic ferromagnetism via double exchange. / Zhang, Baomin; Cao, Chonglong; Li, Guowei; Li, Feng; Ji, Weixiao; Zhang, Shufeng; Ren, Miaojuan; Zhang, Haikun; Zhang, Rui-Qin; Zhong, Zhicheng; Yuan, Zhe; Yuan, Shengjun; Blake, Graeme R.

In: Physical Review B, Vol. 97, No. 16, 165109, 15.04.2018.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review