High-refractive index and mechanically cleavable non-van der Waals InGaS3

Toksumakov, A.N.; Ermolaev, G.A.; Slavich, A.S.; Doroshina, N.V.; Sukhanova, E.V.; Yakubovsky, D.I.; Syuy, A.V.; Novikov, S.M.; Romanov, R.I.; Markeev, A.M.; Oreshonkov, A.S.; Tsymbarenko, D.M.; Popov, Z.I.; Kvashnin, D.G.; Vyshnevyy, A.A.; Arsenin, A.V.; Ghazaryan, D.A.; Volkov, V.S.

Авторы: Toksumakov Adilet N., Ermolaev Georgy A., Slavich Aleksandr S., Doroshina Natalia V., Sukhanova Ekaterina V., Yakubovsky Dmitry I., Syuy Alexander V., Novikov Sergey M., Romanov Roman I., Markeev Andrey M., Oreshonkov Aleksandr S., Tsymbarenko Dmitry M., Popov Zakhar I., Kvashnin Dmitry G., Vyshnevyy Andrey A., Arsenin Aleksey V., Ghazaryan Davit A., Volkov Valentyn S.
Журнал: npj 2D Materials and Applications
Том: 6
Год издания: 2022
Издательство: Springer Nature
Местоположение издательства: Switzerland
Номер статьи: 85
DOI: 10.1038/s41699-022-00359-9
Аннотация: The growing family of two-dimensional crystals has been recognized as a promising platform for investigation of rich low-dimension physics and production of a variety of devices. Of particular interest are recently reported atomic sheets of non-van der Waals materials, which reshape our understanding of chemical bonds and enable heterostructures with novel functionality. Here, we study the structural and optical properties of ultrathin non-van der Waals InGaS3 sheets produced by standard mechanical cleavage. Our ab initio calculations reveal weak out-of-plane covalent bonds, responsible for the layered structure of the material. The energy required for isolation of a single layer is as low as ~50 meVÅ–2, which is comparable with the conventional van der Waals material’s monolayer isolation energies of 20–60 meVÅ–2. A comprehensive study of the structural, vibrational, and optical properties of the material reveals its wide bandgap (2.73 eV), high refractive index (>2.5) and negligible losses in the visible and infrared spectral ranges. These properties make it a perfect candidate for visible-range all-dielectric nanophotonics.
Добавил в систему: Цымбаренко Дмитрий Михайлович

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High-refractive index and mechanically cleavable non-van der Waals InGaS3статья

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