Soft Matter and Complex Systems Seminar
sala 1.40, ul. Pasteura 5
2023-03-17 (09:30) 
Magdalena Birowska (IFT UW)
Magnetic fingerprints in structural, electronic and optical studies of 2D magnetic crystals
In recent years, 2D magnetic materials gained a lot of interest due to their potential optoelectronics applications [1]. The current research focuses on the study of the transition metal phosphorous tri-chalcogenides semiconductors (MPX3, M=1st row transition metals, X=chalcogenides), which are antiferromagnetic compounds exhibiting various magnetic orderings. These materials are stable in air and we predict that the excitonic binding energies are giant for these compounds [2]. In fact, that these materials are 2D magnets, allowing one to both study and use magnetism and optics, and their interplay, in a single stable material. There is no precedence of such a platform in the realm of conventional materials.
In this study, I will tackle a following scientific questions: what mechanism sustains the long-range AFM ordering, and whether the type of magnetic arrangement can be manipulated? In particular, I will present a comprehensive theoretical ab initio results of the electronic and optical properties of the series of MPX3 monolayers (M=Mn, Ni, Fe, Co, and X=S,Se), as well as the alloy systems with magnetic [3] and nonmagnetic substitution [4]. Finally, I highlight the importance of the structural anisotropy in this family of materials [5]. The aformentioned efficient engineering of the magnetism provides a suitable platform to understand the magnetism in thin samples.
[1] M. Gibertini, M. Koperski, A. F. Morpurgo, K. S. Novosolev, Nat. Nanotech. 14, 408 (2019).
[2] M. Birowska, P.E.F. Junior, J. Fabian, J, Kuntsmann, Phys. Rev. B 103, L121108 (2021).
[3] C.Autieri, G. Cuono, C. Noce, M. Rybak, K. M. Kotur, C. E. Agrapidis, K. Wohlfeld, M. Birowska, J. Phys. Chem. C 126, 6791 (2022).
[4] R. Basnet, K. Kotur, M. Rybak, C. Stephenson, S. Bishop, C. Autieri, M. Birowska, J. Hu, Phys. Rev. Research 4, 023256 (2022).
[5] A. K. Budniak, S. J. Zelewski, M. Birowska, T. Wozniak, T. Bendikov, Y. Kauffmann, Y. Amouyal, R. Kudrawiec, E. Lifshitz, Adv. Optical Mater. 2022, 2102489
In this study, I will tackle a following scientific questions: what mechanism sustains the long-range AFM ordering, and whether the type of magnetic arrangement can be manipulated? In particular, I will present a comprehensive theoretical ab initio results of the electronic and optical properties of the series of MPX3 monolayers (M=Mn, Ni, Fe, Co, and X=S,Se), as well as the alloy systems with magnetic [3] and nonmagnetic substitution [4]. Finally, I highlight the importance of the structural anisotropy in this family of materials [5]. The aformentioned efficient engineering of the magnetism provides a suitable platform to understand the magnetism in thin samples.
[1] M. Gibertini, M. Koperski, A. F. Morpurgo, K. S. Novosolev, Nat. Nanotech. 14, 408 (2019).
[2] M. Birowska, P.E.F. Junior, J. Fabian, J, Kuntsmann, Phys. Rev. B 103, L121108 (2021).
[3] C.Autieri, G. Cuono, C. Noce, M. Rybak, K. M. Kotur, C. E. Agrapidis, K. Wohlfeld, M. Birowska, J. Phys. Chem. C 126, 6791 (2022).
[4] R. Basnet, K. Kotur, M. Rybak, C. Stephenson, S. Bishop, C. Autieri, M. Birowska, J. Hu, Phys. Rev. Research 4, 023256 (2022).
[5] A. K. Budniak, S. J. Zelewski, M. Birowska, T. Wozniak, T. Bendikov, Y. Kauffmann, Y. Amouyal, R. Kudrawiec, E. Lifshitz, Adv. Optical Mater. 2022, 2102489