Spin texture induced by non-magnetic doping and spin dynamics in 2D triangular lattice antiferromagnet h-Y(Mn,Al)O 3 .

Autor: Park P; Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea.; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea., Park K; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea., Oh J; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea., Lee KH; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea.; Center for Theoretical Physics of Complex Systems, Institute for Basic Science, Daejeon, 34126, Republic of Korea.; Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea., Leiner JC; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea.; Physik-Department, Technische Universität München, D-85748, Garching, Germany., Sim H; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea., Kim T; Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea.; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea., Jeong J; Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea.; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea., Rule KC; Australian Nuclear Science and Technology Organisation, Lucas Heights, 2234, NSW, Australia., Kamazawa K; Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki, 319-1106, Japan., Iida K; Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki, 319-1106, Japan., Perring TG; ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, United Kingdom., Woo H; ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, United Kingdom.; Department of Physics, Brookhaven National Laboratory, Upton, NY, 11973, USA., Cheong SW; Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey, 08854, USA., Zhitomirsky ME; Université Grenoble Alpes, CEA, IRIG, PHELIQS, 38000, Grenoble, France., Chernyshev AL; Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA., Park JG; Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea. jgpark10@snu.ac.kr.; Center for Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul, 08826, Republic of Korea. jgpark10@snu.ac.kr.; Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea. jgpark10@snu.ac.kr.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 Apr 16; Vol. 12 (1), pp. 2306. Date of Electronic Publication: 2021 Apr 16.
DOI: 10.1038/s41467-021-22569-3
Abstrakt: Novel effects induced by nonmagnetic impurities in frustrated magnets and quantum spin liquid represent a highly nontrivial and interesting problem. A theoretical proposal of extended modulated spin structures induced by doping of such magnets, distinct from the well-known skyrmions has attracted significant interest. Here, we demonstrate that nonmagnetic impurities can produce such extended spin structures in h-YMnO 3 , a triangular antiferromagnet with noncollinear magnetic order. Using inelastic neutron scattering (INS), we measured the full dynamical structure factor in Al-doped h-YMnO 3 and confirmed the presence of magnon damping with a clear momentum dependence. Our theoretical calculations can reproduce the key features of the INS data, supporting the formation of the proposed spin textures. As such, our study provides the first experimental confirmation of the impurity-induced spin textures. It offers new insights and understanding of the impurity effects in a broad class of noncollinear magnetic systems.
Databáze: MEDLINE
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