Rozhraním a pnutím indukované jevy v nových materiálech s porušenou PT symetrií
| Název práce v češtině: | Rozhraním a pnutím indukované jevy v nových materiálech s porušenou PT symetrií |
|---|---|
| Název v anglickém jazyce: | Interface and strain driven phenomena in novel materials with broken PT symmetry |
| Akademický rok vypsání: | 2025/2026 |
| Typ práce: | disertační práce |
| Jazyk práce: | |
| Ústav: | Fyzikální ústav UK (32-FUUK) |
| Vedoucí / školitel: | RNDr. Martin Veis, Ph.D. |
| Řešitel: | |
| Konzultanti: | RNDr. Jakub Zázvorka, Ph.D. |
| Mgr. Jaroslav Hamrle, Ph.D. | |
| Zásady pro vypracování |
| The study aims for the systematic search for strain/interface driven changes in the optical, magneto-optical and magneto-transport properties in novel antiferromagnetic materials with broken PT symmetry. The focus will be mainly on RuO2, doped hematite (Fe2O3) and perovskites (LaMnO3, CaCrO3, ScCrO3, etc.) from the altermagnetic family together with non-collinear antiferromagnetic GdFeO3,BiFeO3, etc. The student will utilize advanced optical, magneto-optical and magneto-transport characterization. He will relate the changes in the response of investigated thin films to their thickness, different substrates and density of defects, and compare them with results from bulk. This will help to find suitable way how to dynamically control physical properties of investigated materials externally via strain or magneto-electric coupling. |
| Seznam odborné literatury |
| [1] R. M. A. Azzam, N. M. Bashara, Ellipsometry and Polarized Light, North-Holland, Amsterdam / New York / Oxford 1977.
[2] Š. Višňovský, Optics in Magnetic Multilayers and Nanostructures, CRC Taylor & Francis, Boca Raton 2006. [3] D. Craik, Magnetism, Wiley 1998 [4] A. Hubert, R. Schafer, Magnetic Domains, Springer 2000 Vybraný soubor původních prací týkajících se tématu. K dispozici u vedoucího práce. |
| Předběžná náplň práce v anglickém jazyce |
| The spin-split band structure in antiferromagnetic materials, induced by the breaking of PT symmetry, has garnered significant attention in recent years. This interest stems from its potential to enable the observation and utilization of technologically relevant phenomena, such as the Anomalous Hall Effect spin-current generation and the magneto-optical Kerr effect. One can distinguish between collinear and non-collinear antiferromagnetic order, where in the latter giant magneto-optical and anomalous magneto-transport phenomena were experimentally observed. In the case of collinear antiferromagnetic order (so called altermagnetism), the spin-split band structure was demonstrated in MnTe and RuO2, however the related magneto-optical and transport phenomena have not been studied in detail yet. Moreover, it was shown that interfaces of these materials play a crucial role in defining their magnetic behavior. For example, local c-type antiferromagnetism favors the altermagnetic properties of LaMnO3 and related compounds. This can be done using proper substrate and strain engineering. |