124 research outputs found
Interfacial-hybridization-modified Ir Ferromagnetism and Electronic Structure in LaMnO/SrIrO Superlattices
Artificially fabricated 3/5 superlattices (SLs) involve both strong
electron correlation and spin-orbit coupling in one material by means of
interfacial 3-5 coupling, whose mechanism remains mostly unexplored. In
this work we investigated the mechanism of interfacial coupling in
LaMnO/SrIrO SLs by several spectroscopic approaches. Hard x-ray
absorption, magnetic circular dichroism and photoemission spectra evidence the
systematic change 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 spin and
orbital 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 3/5 SL system and the conclusion will shed light on the
study of other strongly correlated and spin-orbit coupled oxide
hetero-interfaces
24aPS-78 Aサイトダブルペロブスカイト(Ca,Na)Cu_3V_4O_<12>の光電子分光(24aPS ポスターセッション(低温),領域8(強相関係:高温超伝導,強相関f電子系など))
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