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Quantized phenomena of transport and magneto-optics in magnetic topological insulator heterostructures / Masataka Mogi.

9789811921377 (electronic bk.)
9811921377 (electronic bk.)
9789811921360 (print)

Singapore : Springer, 2022.

English

1 online resource (xv, 109 pages) : illustrations (some color).

10.1007/978-981-19-2137-7 doi

TK7872.T57

621.319/37

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.

"Doctoral Thesis accepted by The University of Tokyo, Tokyo, Japan."

Includes bibliographical references.

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Online resource; title from PDF title page (SpringerLink, viewed May 10, 2022).

Springer theses, 2190-5061

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