Quantized Phenomena of Transport and Magneto-Optics in Magnetic Topological Insulator Heterostructures / / by Masataka Mogi

• Record Nr.: UNINA9910568258903321
• Autore: Mogi Masataka
• Pubbl/distr/stampa: Singapore : , : Springer Nature Singapore : , : Imprint : Springer, , 2022
• ISBN: 9789811921377; 9789811921360
• Edizione: [1st ed. 2022.]
• Descrizione fisica: 1 online resource (xv, 109 pages) : illustrations (some color)
• Collana: Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5061
• Disciplina: 530.41
• Soggetti: Spintronics; Topological insulators; Surfaces (Physics); Semiconductors; Solid state physics; Topological Material; Surface and Interface and Thin Film; Electronic Devices
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: "Doctoral Thesis accepted by The University of Tokyo, Tokyo, Japan."
• Nota di bibliografia: Includes bibliographical references.
• Nota di contenuto: Introduction -- Experimental Methods -- Magnetic Modulation Doping For Quantum Anomalous Hall Effect -- Magnetic Proximity Induced Quantum Anomalous Hall Effect -- Topological Phase Transitions Relevant to Quantum Anomalous Hall Effect -- Half-integer Quantized Electrodynamics in 3D Topological Insulator -- Summary.
• Sommario/riassunto: This book presents experimental studies on emergent transport and magneto-optical properties in three-dimensional topological insulators with two-dimensional Dirac fermions on their surfaces. Designing magnetic heterostructures utilizing a cutting-edge growth technique (molecular beam epitaxy) stabilizes and manifests new quantization phenomena, as confirmed by low-temperature electrical transport and time-domain terahertz magneto-optical measurements. Starting with a review of the theoretical background and recent experimental advances in topological insulators in terms of a novel magneto-electric coupling, ; the author subsequently explores their magnetic quantum properties and reveals topological phase transitions between quantum anomalous Hall insulator and trivial insulator phases; a new topological phase (the axion insulator); and a half-integer quantum Hall state associated with the quantum parity anomaly. Furthermore, the author shows how these quantum phases can be significantly stabilized via magnetic modulation doping and proximity coupling with a normal ferromagnetic insulator. These findings provide a basis for future technologies such as ultra-low energy consumption electronic devices and fault-tolerant topological quantum computers.