Emergent topological spin structures in the centrosymmetric cubic perovskite SrFeO3

被引：73

作者：

Ishiwata, S. ^{[1
,2
,3
,4
]}

Nakajima, T. ^{[5
]}

Kim, J-H ^{[6
]}

Inosov, D. S. ^{[6
,7
]}

Kanazawa, N. ^{[1
,2
]}

White, J. S. ^{[8
]}

Gavilano, J. L. ^{[8
]}

Georgii, R. ^{[9
,10
]}

Seemann, K. M. ^{[9
,10
]}

Brandl, G. ^{[10
]}

Manuel, P. ^{[11
]}

Khalyavin, D. D. ^{[11
]}

Seki, S. ^{[5
]}

Tokunaga, Y. ^{[12
]}

Kinoshita, M. ^{[1
,2
]}

Long, Y. W. ^{[5
,13
]}

Kaneko, Y. ^{[5
]}

Taguchi, Y. ^{[5
]}

Arima, T. ^{[5
,12
]}

Keimer, B. ^{[6
]}

Tokura, Y. ^{[1
,2
,5
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Hongo, Tokyo 1138656, Japan

[2] Univ Tokyo, Quantum Phase Elect Ctr, Hongo, Tokyo 1138656, Japan

[3] JST PRESTO, Kawaguchi, Saitama 3320012, Japan

[4] Osaka Univ, Grad Sch Engn Sci, Div Mat Phys, Toyonaka, Osaka 5608531, Japan

[5] RIKEN, Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan

[6] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[7] Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01069 Dresden, Germany

[8] Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland

[9] Tech Univ Munich, Phys Dept E21, D-85748 Garching, Germany

[10] Tech Univ Munich, Heinz Maier Leibnitz Zentrum, D-85748 Garching, Germany

[11] STFC Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[12] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778561, Japan

[13] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 13期

基金：

瑞士国家科学基金会;

关键词：

SKYRMION LATTICE; MAGNETIC-STRUCTURE; STATES;

D O I：

10.1103/PhysRevB.101.134406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The skyrmion crystal (SkX) characterized by a triple-q helical spin modulation has been reported to be a unique topological state that competes with the single-q helimagnetic order in noncentrosymmetric materials with Dzyaloshinskii-Moriya (DM) interactions. Here, we report the discovery of a rich variety of multiple-q helimagnetic spin structures in the centrosymmetric cubic perovskite SrFeO3 without DM interactions. On the basis of neutron diffraction measurements, we have identified two types of robust multiple-q spin structures that appear in the absence of external magnetic fields: an anisotropic double-q spin spiral and an isotropic quadruple-q spiral hosting a three-dimensional lattice of topological singularities. The present system not only diversifies the family of SkX host materials but furthermore provides an experimental missing link between centrosymmetric lattices and topological helimagnetic order. It also offers perspectives for integration of SkXs into oxide electronic devices.

引用

页数：9

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