Quantized Phenomena of Transport and Magneto-Optics in Magnetic Topological Insulator Heterostructures (eBook)
XV, 109 Seiten
Springer Nature Singapore (Verlag)
978-981-19-2137-7 (ISBN)
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.
Masataka Mogi received his Ph.D. in Engineering from University of Tokyo in 2020. He is now a postdoctoral fellow at the Department of Physics in Massachusetts Institute of Technology.
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.
| Erscheint lt. Verlag | 7.5.2022 |
|---|---|
| Reihe/Serie | Springer Theses | Springer Theses |
| Zusatzinfo | XV, 109 p. 64 illus., 61 illus. in color. |
| Sprache | englisch |
| Themenwelt | Naturwissenschaften ► Chemie ► Analytische Chemie |
| Naturwissenschaften ► Physik / Astronomie ► Festkörperphysik | |
| Naturwissenschaften ► Physik / Astronomie ► Quantenphysik | |
| Naturwissenschaften ► Physik / Astronomie ► Theoretische Physik | |
| Technik ► Elektrotechnik / Energietechnik | |
| Technik ► Maschinenbau | |
| Schlagworte | 3D Topological Insulator • Axion Insulator • Magnetic Proximity Effect • Magneto-Electric Effect • Modulation Doping of Magnetic Elements • Molecular-Beam Epitaxy Thin-Film Growth • Parity Anomaly • Quantum Anomalous Hall Effect • Topological Insulator Thin Film |
| ISBN-10 | 981-19-2137-7 / 9811921377 |
| ISBN-13 | 978-981-19-2137-7 / 9789811921377 |
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