Tuning conductivity and magnetism in isopolar oxide superlattices via compressive and tensile strain: A case study of SrVO3/SrMnO3 and SrCrO3/SrMnO3 heterostructure

Allen Tseng, Anh Pham*, Sean C. Smith, Sean Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We demonstrate the role of compressive and tensile strain to effectively control the conductivity and magnetism in isopolar materials utilizing density functional theory. Using the examples of superlattices containing transition metals with electronegativity differences such as SrVO3/SrMnO3 and SrCrO3/SrMnO3, our results show that the lattice strain can alter the apical oxygen shift at the interface of the transition metal layers, thus affecting the internal charge transfer process between d electrons. In addition, lattice compression and tensile strain can also modify the orbital occupancies of the manganite layers. As a result, various exotic effects can be realized in the SrMnO3 layer such as Mott insulator, quasi-two-dimensional conductivity, and long-range magnetism.

Original languageEnglish
Article number075301
JournalJournal of Applied Physics
Volume119
Issue number7
DOIs
Publication statusPublished - 21 Feb 2016
Externally publishedYes

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