Enhanced magnetism and persistent insulating state in Mn doped Sr2IrO4

Yaodong Li; Rui Niu; Feng Xu; Weili Zhen; Hui Huang; Jingrong Wang; Wenka Zhu; Changjin Zhang

doi:10.1088/1361-648X/ac5e05

Enhanced magnetism and persistent insulating state in Mn doped Sr₂IrO₄

Yaodong Li
, Rui Niu
, Feng Xu
, Weili Zhen
, Hui Huang
, Jingrong Wang
, Wenka Zhu^*
, Changjin Zhang^*

^*Corresponding author for this work

Chinese Academy of Sciences
University of Science and Technology of China
Institutes of Physical Science and Information Technology, Anhui University
Nanjing University

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The influences of Mn substitution at the Ir site of Sr2IrO4 are investigated via a comprehensive study of the variation of structural parameters, the transport and magnetic properties of the Sr2Ir1-x Mn x O4 samples. The incorporation of Mn leads to an increase of the in-plane Ir-O-Ir bond angle, while it is not sufficient to drive the Mott-insulating state to a metallic state. Interestingly, we find a coexistence of Ir4+-O2-Ir4+ super-exchange interaction and Mn3+-O2-Mn4+ double exchange interaction in x ∼ 0.06 samples. The Mn3+-O2-Mn4+ ferromagnetic domains are isolated by the Ir4+-O2-Ir4+ antiferromagnetic areas, leading to a severely localized electronic and magnetic states. The electron hopping between the localized states dominates the conductivity of the Sr2Ir1-x Mn x O4 samples.

Original language	English
Article number	235602
Journal	Journal of Physics Condensed Matter
Volume	34
Issue number	23
DOIs	https://doi.org/10.1088/1361-648X/ac5e05
State	Published - 8 Jun 2022
Externally published	Yes

Keywords

Mn doping
SrIrO
double exchange interaction
insulating state

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10.1088/1361-648X/ac5e05

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title = "Enhanced magnetism and persistent insulating state in Mn doped Sr2IrO4",

abstract = "The influences of Mn substitution at the Ir site of Sr2IrO4 are investigated via a comprehensive study of the variation of structural parameters, the transport and magnetic properties of the Sr2Ir1-x Mn x O4 samples. The incorporation of Mn leads to an increase of the in-plane Ir-O-Ir bond angle, while it is not sufficient to drive the Mott-insulating state to a metallic state. Interestingly, we find a coexistence of Ir4+-O2-Ir4+ super-exchange interaction and Mn3+-O2-Mn4+ double exchange interaction in x ∼ 0.06 samples. The Mn3+-O2-Mn4+ ferromagnetic domains are isolated by the Ir4+-O2-Ir4+ antiferromagnetic areas, leading to a severely localized electronic and magnetic states. The electron hopping between the localized states dominates the conductivity of the Sr2Ir1-x Mn x O4 samples.",

keywords = "Mn doping, SrIrO, double exchange interaction, insulating state",

author = "Yaodong Li and Rui Niu and Feng Xu and Weili Zhen and Hui Huang and Jingrong Wang and Wenka Zhu and Changjin Zhang",

note = "Publisher Copyright: {\textcopyright} 2022 IOP Publishing Ltd.",

year = "2022",

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day = "8",

doi = "10.1088/1361-648X/ac5e05",

language = "英语",

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TY - JOUR

T1 - Enhanced magnetism and persistent insulating state in Mn doped Sr2IrO4

AU - Li, Yaodong

AU - Niu, Rui

AU - Xu, Feng

AU - Zhen, Weili

AU - Huang, Hui

AU - Wang, Jingrong

AU - Zhu, Wenka

AU - Zhang, Changjin

PY - 2022/6/8

Y1 - 2022/6/8

N2 - The influences of Mn substitution at the Ir site of Sr2IrO4 are investigated via a comprehensive study of the variation of structural parameters, the transport and magnetic properties of the Sr2Ir1-x Mn x O4 samples. The incorporation of Mn leads to an increase of the in-plane Ir-O-Ir bond angle, while it is not sufficient to drive the Mott-insulating state to a metallic state. Interestingly, we find a coexistence of Ir4+-O2-Ir4+ super-exchange interaction and Mn3+-O2-Mn4+ double exchange interaction in x ∼ 0.06 samples. The Mn3+-O2-Mn4+ ferromagnetic domains are isolated by the Ir4+-O2-Ir4+ antiferromagnetic areas, leading to a severely localized electronic and magnetic states. The electron hopping between the localized states dominates the conductivity of the Sr2Ir1-x Mn x O4 samples.

AB - The influences of Mn substitution at the Ir site of Sr2IrO4 are investigated via a comprehensive study of the variation of structural parameters, the transport and magnetic properties of the Sr2Ir1-x Mn x O4 samples. The incorporation of Mn leads to an increase of the in-plane Ir-O-Ir bond angle, while it is not sufficient to drive the Mott-insulating state to a metallic state. Interestingly, we find a coexistence of Ir4+-O2-Ir4+ super-exchange interaction and Mn3+-O2-Mn4+ double exchange interaction in x ∼ 0.06 samples. The Mn3+-O2-Mn4+ ferromagnetic domains are isolated by the Ir4+-O2-Ir4+ antiferromagnetic areas, leading to a severely localized electronic and magnetic states. The electron hopping between the localized states dominates the conductivity of the Sr2Ir1-x Mn x O4 samples.

KW - Mn doping

KW - SrIrO

KW - double exchange interaction

KW - insulating state

UR - https://www.scopus.com/pages/publications/85128160152

U2 - 10.1088/1361-648X/ac5e05

DO - 10.1088/1361-648X/ac5e05

M3 - 文章

C2 - 35290974

AN - SCOPUS:85128160152

SN - 0953-8984

VL - 34

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 23

M1 - 235602

ER -

Enhanced magnetism and persistent insulating state in Mn doped Sr₂IrO₄

Abstract

Keywords

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