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Über dieses Buch

This book serves as a brief introduction to topological insulator physics and device applications. Particular attention is paid to the indirect exchange interaction mediated by near surface Dirac fermions and the spin texture this interaction favors. Along with useful information on semiconductor material systems, the book provides a theoretical background for most common concepts of TI physics. Readers will benefit from up to date information and methods needed to start working in TI physics, theory, experiment and device applications.Discusses inter-spin interaction via massless and massive Dirac excitations;
Includes coverage of near-surface spin texture of the magnetic atoms as related to their mutual positions as well to their positions with respect to top and bottom surfaces in thin TI film;
Describes non-RKKY oscillating inter-spin interaction as a signature of the topological state;
Explains the origin of the giant Rashba interaction at quantum phase transition in TI-conventional semiconductors.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Energy Bands in Topological Insulators

Abstract
The chapter describes a real-life example of the topological insulator by calculating the surface energy spectrum in bismuth chalcogenides. The spin-momentum locking of the massless and massive Dirac fermions and the inverse spin-galvanic effect are discussed.
Vladimir Litvinov

Chapter 2. Hall Effects and Berry Phase

Abstract
The chapter gives basic information about the Berry phase and parameters that differentiate TI from conventional dielectrics. The integer quantum Hall and intrinsic anomalous Hall effects are discussed in relation to the topology of Hilbert space in crystals.
Vladimir Litvinov

Chapter 3. Magnetic Field and Ferromagnetic Proximity Effects

Abstract
The chapter examines various magnetic gaps in the Dirac spectrum and proximity-induced surface Hall conductivity. Topological phase transitions in a parallel magnetic field, the current-induced torque, and possible device applications are discussed.
Vladimir Litvinov

Chapter 4. Topological Magnetoelectric Effect

Abstract
The chapter introduces the basic parameters that determine the topological magnetoelectric effect and discusses the anomalous quantum Hall effect in topological thin films.
Vladimir Litvinov

Chapter 5. Rashba Effect in Topological Quantum Wells

Abstract
The chapter deals with the zero magnetic field spin-splitting in topological quantum wells. It is shown that the splitting acquires specific features if the bulk is in the non-trivial topological phase.
Vladimir Litvinov

Chapter 6. Spin-Electron (s-d) Interaction in TI Thin Films

Abstract
In this chapter, we propose the effective surface model, in which the interaction matrix depends on the position of localized spins relative to the slab surfaces. The s-d interaction constants are specific to a particular TI depending on whether it is a thick sample with a single massless Dirac cone or a thin slab with gapped massive fermions.
Vladimir Litvinov

Chapter 7. Indirect Exchange Interaction Mediated by Dirac Fermions

Abstract
Based on the model of s-d interaction discussed in Chap. 6, the indirect exchange interaction between a pair of magnetic impurities is calculated. The interaction carries the signature of the topological surface states. The chapter discusses possible magnetic textures induced by the indirect exchange.
Vladimir Litvinov

Chapter 8. Device Applications

Abstract
The chapter deals with experimental aspects of topological insulators and their device applications in electronics and optoelectronics.
Vladimir Litvinov

Backmatter

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