Topological magnons driven by the Dzyaloshinskii-Moriya interaction in the centrosymmetric ferromagnet Mn₅Ge₃
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"doi": "10.24435/materialscloud:xq-5d",
"status": "published",
"title": "Topological magnons driven by the Dzyaloshinskii-Moriya interaction in the centrosymmetric ferromagnet Mn\u2085Ge\u2083",
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"keywords": [
"topological magnon",
"spin waves",
"inelastic neutron scattering",
"Dzyaloshinskii-Moriya interaction",
"MARVEL"
],
"conceptrecid": "1623",
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"references": [
{
"type": "Preprint",
"doi": "10.48550/arXiv.2211.16925",
"url": "https://arxiv.org/abs/2211.16925",
"comment": "Preprint where the data was used",
"citation": "M. dos Santos Diat et al., arXiv:2211.16925 (2022)"
}
],
"publication_date": "Jan 19, 2023, 17:27:35",
"license": "Creative Commons Attribution 4.0 International",
"id": "1624",
"description": "The phase of the quantum-mechanical wave function can encode a topological structure with wide-ranging physical consequences, such as anomalous transport effects and the existence of edge states robust against perturbations. While this has been exhaustively demonstrated for electrons, properties associated with the elementary quasiparticles in magnetic materials are still underexplored. Here, we show theoretically and via inelastic neutron scattering experiments that the bulk ferromagnet Mn\u2085Ge\u2083 hosts gapped topological Dirac magnons. Although inversion symmetry prohibits a net Dzyaloshinskii-Moriya interaction in the unit cell, it is locally allowed and is responsible for the gap opening in the magnon spectrum. This gap is predicted and experimentally verified to close by rotating the magnetization away from the c-axis. Hence, Mn\u2085Ge\u2083 is the first realization of a gapped Dirac magnon material in three dimensions. Its tunability by chemical doping or by thin film nanostructuring defines an exciting new platform to explore and design topological magnons.",
"version": 1,
"contributors": [
{
"email": "m.dos.santos.dias@fz-juelich.de",
"affiliations": [
"Peter Gr\u00fcnberg Institut and Institute for Advanced Simulation,\nForschungszentrum J\u00fclich & JARA, D-52425 J\u00fclich, Germany",
"Faculty of Physics, University of Duisburg-Essen and CENIDE, D-47053 Duisburg, Germany",
"Scientific Computing Department, STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom"
],
"familyname": "dos Santos Dias",
"givennames": "M."
},
{
"email": "n.biniskos@fz-juelich.de",
"affiliations": [
"Forschungszentrum J\u00fclich GmbH, J\u00fclich Centre for Neutron Science at MLZ, Lichtenbergstr. 1, D-85748 Garching, Germany"
],
"familyname": "Biniskos",
"givennames": "N."
},
{
"email": "flaviano.dossantos@epfl.ch",
"affiliations": [
"Theory and Simulation of Materials (THEOS), and National Centre for\nComputational Design and Discovery of Novel Materials (MARVEL),\n\u00c9cole Polytechnique F\u00e9d\u00e9rale de Lausanne, 1015 Lausanne, Switzerland",
"Laboratory for Materials Simulations, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland"
],
"familyname": "dos Santos",
"givennames": "F. J."
},
{
"affiliations": [
"Forschungszentrum J\u00fclich GmbH, J\u00fclich Centre for Neutron Science at ILL,\n71 Avenue des Martyrs, F-38000 Grenoble, France"
],
"familyname": "Schmalzl",
"givennames": "K."
},
{
"affiliations": [
"Forschungszentrum J\u00fclich GmbH, J\u00fclich Centre for Neutron Science (JCNS-2)\nand Peter Gr\u00fcnberg Institut (PGI-4), JARA-FIT, D-52425 J\u00fclich, Germany"
],
"familyname": "Persson",
"givennames": "J."
},
{
"affiliations": [
"Universit\u00e9 Grenoble Alpes, CEA, IRIG, MEM, MDN, F-38000 Grenoble, France"
],
"familyname": "Bourdarot",
"givennames": "F."
},
{
"affiliations": [
"Theory and Simulation of Materials (THEOS), and National Centre for Computational Design and Discovery of Novel Materials (MARVEL), \u00c9cole Polytechnique F\u00e9d\u00e9rale de Lausanne, 1015 Lausanne, Switzerland",
"Laboratory for Materials Simulations, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland"
],
"familyname": "Marzari",
"givennames": "N."
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institut and Institute for Advanced Simulation,\nForschungszentrum J\u00fclich & JARA, D-52425 J\u00fclich, Germany"
],
"familyname": "Bl\u00fcgel",
"givennames": "S."
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institut and Institute for Advanced Simulation,\nForschungszentrum J\u00fclich & JARA, D-52425 J\u00fclich, Germany",
"Faculty of Physics, University of Duisburg-Essen and CENIDE, D-47053 Duisburg, Germany"
],
"familyname": "Lounis",
"givennames": "S."
}
],
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