Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}

Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}

Recently reported with nontrivial topological properties and magnetic orders, MnBi_{2}Te_{4} is an intrinsic, magnetic topological insulator which holds promise for exploring exotic quantum phenomena such as the quantum anomalous Hall effect. However, the layer-dependent magnetism of MnBi_{2}Te_{4},...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Shiqi Yang, Xiaolong Xu, Yaozheng Zhu, Ruirui Niu, Chunqiang Xu, Yuxuan Peng, Xing Cheng, Xionghui Jia, Yuan Huang, Xiaofeng Xu, Jianming Lu, Yu Ye
Formato: article
Lenguaje:EN
Publicado: American Physical Society 2021
Materias:
Physics
QC1-999
Acceso en línea:https://doaj.org/article/b519eeb30a1e49c5bd7eaea53f302fb2
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:b519eeb30a1e49c5bd7eaea53f302fb2
record_format dspace
spelling oai:doaj.org-article:b519eeb30a1e49c5bd7eaea53f302fb22021-12-02T14:09:11ZOdd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}10.1103/PhysRevX.11.0110032160-3308https://doaj.org/article/b519eeb30a1e49c5bd7eaea53f302fb22021-01-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.011003http://doi.org/10.1103/PhysRevX.11.011003https://doaj.org/toc/2160-3308Recently reported with nontrivial topological properties and magnetic orders, MnBi_{2}Te_{4} is an intrinsic, magnetic topological insulator which holds promise for exploring exotic quantum phenomena such as the quantum anomalous Hall effect. However, the layer-dependent magnetism of MnBi_{2}Te_{4}, which is fundamental and crucial for further exploration of related quantum phenomena in this system, remains elusive. Here, by using polar reflective magnetic circular dichroism spectroscopy, we show that few-layered MnBi_{2}Te_{4} exhibits an evident odd-even layer-number effect, i.e., the oscillations of the coercivity of the hysteresis loop (at μ_{0}H_{c}) and the spin-flop transition (at μ_{0}H_{1}), concerning the Zeeman energy and magnetic anisotropy energy. Noticeably, an anomalous magnetic hysteresis loop is observed in the even-number septuple-layered MnBi_{2}Te_{4}, which might be attributed to the thickness-independent surface-related magnetization. A linear-chain model is applied to elucidate this odd-even layer-number effect of the spin-flop field and to determine the evolution of the magnetic states when subjected to an external magnetic field. A mean-field method further allows us to fully map the MnBi_{2}Te_{4} flake’s magnetic phase diagrams in the parameter space of the magnetic field, layer number, and, especially, temperature. By harnessing the unusual layer-dependent magnetic properties, our work paves the way for further study of quantum phenomena of MnBi_{2}Te_{4}.Shiqi YangXiaolong XuYaozheng ZhuRuirui NiuChunqiang XuYuxuan PengXing ChengXionghui JiaYuan HuangXiaofeng XuJianming LuYu YeAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 1, p 011003 (2021)
institution DOAJ
collection DOAJ
language EN
topic Physics
QC1-999
spellingShingle Physics
QC1-999
Shiqi Yang
Xiaolong Xu
Yaozheng Zhu
Ruirui Niu
Chunqiang Xu
Yuxuan Peng
Xing Cheng
Xionghui Jia
Yuan Huang
Xiaofeng Xu
Jianming Lu
Yu Ye
Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}
description Recently reported with nontrivial topological properties and magnetic orders, MnBi_{2}Te_{4} is an intrinsic, magnetic topological insulator which holds promise for exploring exotic quantum phenomena such as the quantum anomalous Hall effect. However, the layer-dependent magnetism of MnBi_{2}Te_{4}, which is fundamental and crucial for further exploration of related quantum phenomena in this system, remains elusive. Here, by using polar reflective magnetic circular dichroism spectroscopy, we show that few-layered MnBi_{2}Te_{4} exhibits an evident odd-even layer-number effect, i.e., the oscillations of the coercivity of the hysteresis loop (at μ_{0}H_{c}) and the spin-flop transition (at μ_{0}H_{1}), concerning the Zeeman energy and magnetic anisotropy energy. Noticeably, an anomalous magnetic hysteresis loop is observed in the even-number septuple-layered MnBi_{2}Te_{4}, which might be attributed to the thickness-independent surface-related magnetization. A linear-chain model is applied to elucidate this odd-even layer-number effect of the spin-flop field and to determine the evolution of the magnetic states when subjected to an external magnetic field. A mean-field method further allows us to fully map the MnBi_{2}Te_{4} flake’s magnetic phase diagrams in the parameter space of the magnetic field, layer number, and, especially, temperature. By harnessing the unusual layer-dependent magnetic properties, our work paves the way for further study of quantum phenomena of MnBi_{2}Te_{4}.
format article
author Shiqi Yang
Xiaolong Xu
Yaozheng Zhu
Ruirui Niu
Chunqiang Xu
Yuxuan Peng
Xing Cheng
Xionghui Jia
Yuan Huang
Xiaofeng Xu
Jianming Lu
Yu Ye
author_facet Shiqi Yang
Xiaolong Xu
Yaozheng Zhu
Ruirui Niu
Chunqiang Xu
Yuxuan Peng
Xing Cheng
Xionghui Jia
Yuan Huang
Xiaofeng Xu
Jianming Lu
Yu Ye
author_sort Shiqi Yang
title Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}
title_short Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}
title_full Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}
title_fullStr Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}
title_full_unstemmed Odd-Even Layer-Number Effect and Layer-Dependent Magnetic Phase Diagrams in MnBi_{2}Te_{4}
title_sort odd-even layer-number effect and layer-dependent magnetic phase diagrams in mnbi_{2}te_{4}
publisher American Physical Society
publishDate 2021
url https://doaj.org/article/b519eeb30a1e49c5bd7eaea53f302fb2
work_keys_str_mv AT shiqiyang oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT xiaolongxu oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT yaozhengzhu oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT ruiruiniu oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT chunqiangxu oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT yuxuanpeng oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT xingcheng oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT xionghuijia oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT yuanhuang oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT xiaofengxu oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT jianminglu oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
AT yuye oddevenlayernumbereffectandlayerdependentmagneticphasediagramsinmnbi2te4
_version_ 1718391927414456320

Ejemplares similares