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Title: Interfacial-hybridization-modified Ir ferromagnetism and electronic structure in LaMnO3/SrIrO3 superlattices
Authors: Zhang, Yujun
Luo, Yong Zheng
Wu, Liang
Suzuki, Motohiro
Zhang, Qinghua
Hirata, Yasuyuki
Yamagami, Kohei
Takubo, Kou
Ikeda, Keisuke
Yamamoto, Kohei
Yasui, Akira
Kawamura, Naomi
Lin, Chun
Koshiishi, Keisuke
Liu, Xin
Zhang, Jinxing
Hotta, Yasushi
Wang, Renshaw Xiao
Fujimori, Atsushi
Lin, Yuanhua
Nan, Cewen
Shen, Lei
Wadati, Hiroki
Keywords: Science::Physics
Issue Date: 2020
Source: Zhang, Y., Luo, Y. Z., Wu, L., Suzuki, M., Zhang, Q., Hirata, Y., Yamagami, K., Takubo, K., Ikeda, K., Yamamoto, K., Yasui, A., Kawamura, N., Lin, C., Koshiishi, K., Liu, X., Zhang, J., Hotta, Y., Wang, R. X., Fujimori, A., ...Wadati, H. (2020). Interfacial-hybridization-modified Ir ferromagnetism and electronic structure in LaMnO3/SrIrO3 superlattices. Physical Review Research, 2(3).
Journal: Physical Review Research
Abstract: Artificially fabricated 3d/5d superlattices (SLs) involve both strong electron correlation and spin-orbit coupling in one material by means of interfacial 3d-5d coupling, whose mechanism remains mostly unexplored. In this work we investigated the mechanism of interfacial coupling in LaMnO3/SrIrO3 SLs by several spectroscopic approaches. Hard x-ray absorption, magnetic circular dichroism and photoemission spectra evidence the systematic modulation of the Ir ferromagnetism and the electronic structure with the change of the SL repetition period. First-principles calculations further reveal the mechanism of the SL-period dependence of the interfacial electronic structure and the local properties of the Ir moments, confirming that the formation of Ir-Mn molecular orbital is responsible for the interfacial coupling effects. The SL-period dependence of the ratio between orbital and spin components of the Ir magnetic moments can be attributed to the realignment of electron spin during the formation of the interfacial molecular orbital. Our results clarify the nature of interfacial coupling in this prototypical 3d/5d SL system and the conclusion will shed light on the study of other strongly correlated and spin-orbit coupled oxide heterointerfaces.
ISSN: 2643-1564
DOI: 10.1103/PhysRevResearch.2.033496
Rights: © 2020 The Author(s) (American Physical Society). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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