Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub>
We report on the far-infrared, temperature-dependent optical properties of a CrI<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics>...
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| Format: | Article |
| Language: | English |
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| Online Access: | https://www.mdpi.com/1996-1944/16/14/4909 |
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| author | Luca Tomarchio Lorenzo Mosesso Salvatore Macis Loi T. Nguyen Antonio Grilli Martina Romani Mariangela Cestelli Guidi Robert J. Cava Stefano Lupi |
| author_facet | Luca Tomarchio Lorenzo Mosesso Salvatore Macis Loi T. Nguyen Antonio Grilli Martina Romani Mariangela Cestelli Guidi Robert J. Cava Stefano Lupi |
| author_sort | Luca Tomarchio |
| collection | DOAJ |
| description | We report on the far-infrared, temperature-dependent optical properties of a CrI<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> 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<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> 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<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula>. |
| first_indexed | 2024-03-11T00:52:51Z |
| format | Article |
| id | doaj.art-66eaeed572db4c29a179889224dc0e00 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T00:52:51Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-66eaeed572db4c29a179889224dc0e002023-11-18T20:14:54ZengMDPI AGMaterials1996-19442023-07-011614490910.3390/ma16144909Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub>Luca Tomarchio0Lorenzo Mosesso1Salvatore Macis2Loi T. Nguyen3Antonio Grilli4Martina Romani5Mariangela Cestelli Guidi6Robert J. Cava7Stefano Lupi8Department of Physics, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, ItalyDepartment of Physics, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, ItalyDepartment of Physics, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, ItalyDepartment of Chemistry, Princeton University, Princeton, NJ 08544, USAINFN—Laboratori Nazionali di Frascati, Via Enrico Fermi 54, 00044 Rome, ItalyINFN—Laboratori Nazionali di Frascati, Via Enrico Fermi 54, 00044 Rome, ItalyINFN—Laboratori Nazionali di Frascati, Via Enrico Fermi 54, 00044 Rome, ItalyDepartment of Chemistry, Princeton University, Princeton, NJ 08544, USADepartment of Physics, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, ItalyWe report on the far-infrared, temperature-dependent optical properties of a CrI<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> 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<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> 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<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula>.https://www.mdpi.com/1996-1944/16/14/4909optical spectroscopyvan der Waals ferromagnetspin–phonon couplingphonon anharmonicity |
| spellingShingle | Luca Tomarchio Lorenzo Mosesso Salvatore Macis Loi T. Nguyen Antonio Grilli Martina Romani Mariangela Cestelli Guidi Robert J. Cava Stefano Lupi Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub> Materials optical spectroscopy van der Waals ferromagnet spin–phonon coupling phonon anharmonicity |
| title | Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub> |
| title_full | Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub> |
| title_fullStr | Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub> |
| title_full_unstemmed | Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub> |
| title_short | Phonon Anharmonicity and Spin–Phonon Coupling in CrI<sub>3</sub> |
| title_sort | phonon anharmonicity and spin phonon coupling in cri sub 3 sub |
| topic | optical spectroscopy van der Waals ferromagnet spin–phonon coupling phonon anharmonicity |
| url | https://www.mdpi.com/1996-1944/16/14/4909 |
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