Low energy electrodynamics of CrI3 layered ferromagnet

Abstract We report on the optical properties from terahertz (THz) to Near-Infrared (NIR) of the layered magnetic compound CrI3 at various temperatures, both in the paramagnetic and ferromagnetic phase. In the NIR spectral range, we observe an insulating electronic gap around 1.1 eV which strongly ha...

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Autores principales:	Luca Tomarchio, Salvatore Macis, Lorenzo Mosesso, Loi T. Nguyen, Antonio Grilli, Mariangela Cestelli Guidi, Robert J. Cava, Stefano Lupi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6ddfb2d0d92a44189208b3fe33a881b0
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spelling	oai:doaj.org-article:6ddfb2d0d92a44189208b3fe33a881b02021-12-05T12:15:23ZLow energy electrodynamics of CrI3 layered ferromagnet10.1038/s41598-021-02918-42045-2322https://doaj.org/article/6ddfb2d0d92a44189208b3fe33a881b02021-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02918-4https://doaj.org/toc/2045-2322Abstract We report on the optical properties from terahertz (THz) to Near-Infrared (NIR) of the layered magnetic compound CrI3 at various temperatures, both in the paramagnetic and ferromagnetic phase. In the NIR spectral range, we observe an insulating electronic gap around 1.1 eV which strongly hardens with decreasing temperature. The blue shift observed represents a record in insulating materials and it is a fingerprint of a strong electron-phonon interaction. Moreover, a further gap hardening is observed below the Curie temperature, indicating the establishment of an effective interaction between electrons and magnetic degrees of freedom in the ferromagnetic phase. Similar interactions are confirmed by the disappearance of some phonon modes in the same phase, as expected from a spin-lattice interaction theory. Therefore, the optical properties of CrI3 reveal a complex interaction among electronic, phononic and magnetic degrees of freedom, opening many possibilities for its use in 2-Dimensional heterostructures.Luca TomarchioSalvatore MacisLorenzo MosessoLoi T. NguyenAntonio GrilliMariangela Cestelli GuidiRobert J. CavaStefano LupiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Luca Tomarchio Salvatore Macis Lorenzo Mosesso Loi T. Nguyen Antonio Grilli Mariangela Cestelli Guidi Robert J. Cava Stefano Lupi Low energy electrodynamics of CrI3 layered ferromagnet
description	Abstract We report on the optical properties from terahertz (THz) to Near-Infrared (NIR) of the layered magnetic compound CrI3 at various temperatures, both in the paramagnetic and ferromagnetic phase. In the NIR spectral range, we observe an insulating electronic gap around 1.1 eV which strongly hardens with decreasing temperature. The blue shift observed represents a record in insulating materials and it is a fingerprint of a strong electron-phonon interaction. Moreover, a further gap hardening is observed below the Curie temperature, indicating the establishment of an effective interaction between electrons and magnetic degrees of freedom in the ferromagnetic phase. Similar interactions are confirmed by the disappearance of some phonon modes in the same phase, as expected from a spin-lattice interaction theory. Therefore, the optical properties of CrI3 reveal a complex interaction among electronic, phononic and magnetic degrees of freedom, opening many possibilities for its use in 2-Dimensional heterostructures.
format	article
author	Luca Tomarchio Salvatore Macis Lorenzo Mosesso Loi T. Nguyen Antonio Grilli Mariangela Cestelli Guidi Robert J. Cava Stefano Lupi
author_facet	Luca Tomarchio Salvatore Macis Lorenzo Mosesso Loi T. Nguyen Antonio Grilli Mariangela Cestelli Guidi Robert J. Cava Stefano Lupi
author_sort	Luca Tomarchio
title	Low energy electrodynamics of CrI3 layered ferromagnet
title_short	Low energy electrodynamics of CrI3 layered ferromagnet
title_full	Low energy electrodynamics of CrI3 layered ferromagnet
title_fullStr	Low energy electrodynamics of CrI3 layered ferromagnet
title_full_unstemmed	Low energy electrodynamics of CrI3 layered ferromagnet
title_sort	low energy electrodynamics of cri3 layered ferromagnet
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6ddfb2d0d92a44189208b3fe33a881b0
work_keys_str_mv	AT lucatomarchio lowenergyelectrodynamicsofcri3layeredferromagnet AT salvatoremacis lowenergyelectrodynamicsofcri3layeredferromagnet AT lorenzomosesso lowenergyelectrodynamicsofcri3layeredferromagnet AT loitnguyen lowenergyelectrodynamicsofcri3layeredferromagnet AT antoniogrilli lowenergyelectrodynamicsofcri3layeredferromagnet AT mariangelacestelliguidi lowenergyelectrodynamicsofcri3layeredferromagnet AT robertjcava lowenergyelectrodynamicsofcri3layeredferromagnet AT stefanolupi lowenergyelectrodynamicsofcri3layeredferromagnet
_version_	1718372078795620352

Low energy electrodynamics of CrI3 layered ferromagnet

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