Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3)

We report on the far-infrared, temperature-dependent optical properties of a CrI [Formula: see text] transition metal halide single crystal, a van der Waals ferromagnet (FM) with a Curie temperature of 61 K. In addition to the expected phonon modes determined by the crystalline symmetry, the optical...

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Autores principales: Tomarchio, Luca, Mosesso, Lorenzo, Macis, Salvatore, Nguyen, Loi T., Grilli, Antonio, Romani, Martina, Cestelli Guidi, Mariangela, Cava, Robert J., Lupi, Stefano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10381855/
https://www.ncbi.nlm.nih.gov/pubmed/37512184
http://dx.doi.org/10.3390/ma16144909
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author Tomarchio, Luca
Mosesso, Lorenzo
Macis, Salvatore
Nguyen, Loi T.
Grilli, Antonio
Romani, Martina
Cestelli Guidi, Mariangela
Cava, Robert J.
Lupi, Stefano
author_facet Tomarchio, Luca
Mosesso, Lorenzo
Macis, Salvatore
Nguyen, Loi T.
Grilli, Antonio
Romani, Martina
Cestelli Guidi, Mariangela
Cava, Robert J.
Lupi, Stefano
author_sort Tomarchio, Luca
collection PubMed
description We report on the far-infrared, temperature-dependent optical properties of a CrI [Formula: see text] transition metal halide single crystal, a van der Waals ferromagnet (FM) with a Curie temperature of 61 K. In addition to the expected phonon modes determined by the crystalline symmetry, the optical reflectance and transmittance spectra of CrI [Formula: see text] single crystals show many other excitations as a function of temperature as a consequence of the combination of a strong lattice anharmonicity and spin–phonon coupling. This complex vibrational spectrum highlights the presence of entangled interactions among the different degrees of freedom in CrI [Formula: see text].
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spelling pubmed-103818552023-07-29 Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3) Tomarchio, Luca Mosesso, Lorenzo Macis, Salvatore Nguyen, Loi T. Grilli, Antonio Romani, Martina Cestelli Guidi, Mariangela Cava, Robert J. Lupi, Stefano Materials (Basel) Article We report on the far-infrared, temperature-dependent optical properties of a CrI [Formula: see text] transition metal halide single crystal, a van der Waals ferromagnet (FM) with a Curie temperature of 61 K. In addition to the expected phonon modes determined by the crystalline symmetry, the optical reflectance and transmittance spectra of CrI [Formula: see text] single crystals show many other excitations as a function of temperature as a consequence of the combination of a strong lattice anharmonicity and spin–phonon coupling. This complex vibrational spectrum highlights the presence of entangled interactions among the different degrees of freedom in CrI [Formula: see text]. MDPI 2023-07-09 /pmc/articles/PMC10381855/ /pubmed/37512184 http://dx.doi.org/10.3390/ma16144909 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tomarchio, Luca
Mosesso, Lorenzo
Macis, Salvatore
Nguyen, Loi T.
Grilli, Antonio
Romani, Martina
Cestelli Guidi, Mariangela
Cava, Robert J.
Lupi, Stefano
Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3)
title Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3)
title_full Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3)
title_fullStr Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3)
title_full_unstemmed Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3)
title_short Phonon Anharmonicity and Spin–Phonon Coupling in CrI(3)
title_sort phonon anharmonicity and spin–phonon coupling in cri(3)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10381855/
https://www.ncbi.nlm.nih.gov/pubmed/37512184
http://dx.doi.org/10.3390/ma16144909
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