Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn 2 P2
Articolo
Data di Pubblicazione:
2022
Citazione:
Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn 2 P2 / G. Marco Pierantozzi, A. DE VITA, C. Bigi, X. Gui, H. Tien, D. Mondal, F. Mazzola, J. Fujii, I. Vobornik, G. Vinai, A. Sala, C. Africh, T. Lee, G. Rossi, T. Chang, W.X.R.J. Cava, A. Giancarlo Panaccione. - In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - ISSN 1091-6490. - 119:4(2022 Jan), pp. e2116575119.1-e2116575119.6. [10.1073/pnas.2116575119]
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 first-
principle calculations. We reveal the presence of in-plane long-
range ferromagnetic order triggering topological invariants and
resulting in the multiple protection of topological Dirac states. We
provide clear evidence that layer-dependent spin-momentum lock-
ing coexists with ferromagnetism in this material, a cohabitation
that promotes EuSn2P2 as a prime candidate axion insulator for
topological antiferromagnetic spintronics applications.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
axion insulator; magnetism; spin polarization; ARPES; topological surface states
Elenco autori:
G. Marco Pierantozzi, A. DE VITA, C. Bigi, X. Gui, H. Tien, D. Mondal, F. Mazzola, J. Fujii, I. Vobornik, G. Vinai, A. Sala, C. Africh, T. Lee, G. Rossi, T. Chang, W.X.R.J. Cava, A. Giancarlo Panaccione
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