Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2

Gian Marco Pierantozzi; Alessandro De Vita; Chiara Bigi; Xin Gui; Hung Ju Tien; Debashis Mondal; Federico Mazzola; Jun Fujii; Ivana Vobornik; Giovanni Vinai; Alessandro Sala; Cristina Africh; Tien Lin Lee; Giorgio Rossi; Tay Rong Chang; Weiwei Xie; Robert J. Cava; Giancarlo Panaccione

doi:10.1073/pnas.2116575119

Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2

Gian Marco Pierantozzi
, Alessandro De Vita
, Chiara Bigi
, Xin Gui
, Hung Ju Tien
, Debashis Mondal
, Federico Mazzola
, Jun Fujii
, Ivana Vobornik
, Giovanni Vinai
, Alessandro Sala
, Cristina Africh
, Tien Lin Lee
, Giorgio Rossi
, Tay Rong Chang
, Weiwei Xie
, Robert J. Cava
, Giancarlo Panaccione

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

21 Scopus citations

Abstract

We unravel the interplay of topological properties and the layered (anti)ferromagnetic ordering in EuSn2P2, using spin and chemical selective electron and X-ray spectroscopies supported by firstprinciple calculations. We reveal the presence of in-plane longrange ferromagnetic order triggering topological invariants and resulting in the multiple protection of topological Dirac states. We provide clear evidence that layer-dependent spin-momentum locking coexists with ferromagnetism in this material, a cohabitation that promotes EuSn2P2 as a prime candidate axion insulator for topological antiferromagnetic spintronics applications.

Original language	English (US)
Article number	e2116575119
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	119
Issue number	4
DOIs	https://doi.org/10.1073/pnas.2116575119
State	Published - Jan 25 2022

All Science Journal Classification (ASJC) codes

General

Keywords

ARPES
Axion insulator
Magnetism
Spin polarization
Topological surface states

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10.1073/pnas.2116575119

Cite this

Pierantozzi, G. M., De Vita, A., Bigi, C., Gui, X., Tien, H. J., Mondal, D., Mazzola, F., Fujii, J., Vobornik, I., Vinai, G., Sala, A., Africh, C., Lee, T. L., Rossi, G., Chang, T. R., Xie, W., Cava, R. J., & Panaccione, G. (2022). Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2. Proceedings of the National Academy of Sciences of the United States of America, 119(4), Article e2116575119. https://doi.org/10.1073/pnas.2116575119

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title = "Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2",

abstract = "We unravel the interplay of topological properties and the layered (anti)ferromagnetic ordering in EuSn2P2, using spin and chemical selective electron and X-ray spectroscopies supported by firstprinciple calculations. We reveal the presence of in-plane longrange ferromagnetic order triggering topological invariants and resulting in the multiple protection of topological Dirac states. We provide clear evidence that layer-dependent spin-momentum locking coexists with ferromagnetism in this material, a cohabitation that promotes EuSn2P2 as a prime candidate axion insulator for topological antiferromagnetic spintronics applications.",

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author = "Pierantozzi, \{Gian Marco\} and \{De Vita\}, Alessandro and Chiara Bigi and Xin Gui and Tien, \{Hung Ju\} and Debashis Mondal and Federico Mazzola and Jun Fujii and Ivana Vobornik and Giovanni Vinai and Alessandro Sala and Cristina Africh and Lee, \{Tien Lin\} and Giorgio Rossi and Chang, \{Tay Rong\} and Weiwei Xie and Cava, \{Robert J.\} and Giancarlo Panaccione",

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Pierantozzi, GM, De Vita, A, Bigi, C, Gui, X, Tien, HJ, Mondal, D, Mazzola, F, Fujii, J, Vobornik, I, Vinai, G, Sala, A, Africh, C, Lee, TL, Rossi, G, Chang, TR, Xie, W, Cava, RJ & Panaccione, G 2022, 'Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2', Proceedings of the National Academy of Sciences of the United States of America, vol. 119, no. 4, e2116575119. https://doi.org/10.1073/pnas.2116575119

TY - JOUR

T1 - Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2

AU - Pierantozzi, Gian Marco

AU - De Vita, Alessandro

AU - Bigi, Chiara

AU - Gui, Xin

AU - Tien, Hung Ju

AU - Mondal, Debashis

AU - Mazzola, Federico

AU - Fujii, Jun

AU - Vobornik, Ivana

AU - Vinai, Giovanni

AU - Sala, Alessandro

AU - Africh, Cristina

AU - Lee, Tien Lin

AU - Rossi, Giorgio

AU - Chang, Tay Rong

AU - Xie, Weiwei

AU - Cava, Robert J.

AU - Panaccione, Giancarlo

PY - 2022/1/25

Y1 - 2022/1/25

N2 - We unravel the interplay of topological properties and the layered (anti)ferromagnetic ordering in EuSn2P2, using spin and chemical selective electron and X-ray spectroscopies supported by firstprinciple calculations. We reveal the presence of in-plane longrange ferromagnetic order triggering topological invariants and resulting in the multiple protection of topological Dirac states. We provide clear evidence that layer-dependent spin-momentum locking coexists with ferromagnetism in this material, a cohabitation that promotes EuSn2P2 as a prime candidate axion insulator for topological antiferromagnetic spintronics applications.

AB - We unravel the interplay of topological properties and the layered (anti)ferromagnetic ordering in EuSn2P2, using spin and chemical selective electron and X-ray spectroscopies supported by firstprinciple calculations. We reveal the presence of in-plane longrange ferromagnetic order triggering topological invariants and resulting in the multiple protection of topological Dirac states. We provide clear evidence that layer-dependent spin-momentum locking coexists with ferromagnetism in this material, a cohabitation that promotes EuSn2P2 as a prime candidate axion insulator for topological antiferromagnetic spintronics applications.

KW - ARPES

KW - Axion insulator

KW - Magnetism

KW - Spin polarization

KW - Topological surface states

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AN - SCOPUS:85123088814

SN - 0027-8424

VL - 119

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 4

M1 - e2116575119

ER -

Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2

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