Optical Properties of Bismuth-Based Topological Insulators

Nonfiction, Science & Nature, Technology, Electronics, Semiconductors, Material Science
Cover of the book Optical Properties of Bismuth-Based Topological Insulators by Paola Di Pietro, Springer International Publishing
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Author: Paola Di Pietro ISBN: 9783319019918
Publisher: Springer International Publishing Publication: October 24, 2013
Imprint: Springer Language: English
Author: Paola Di Pietro
ISBN: 9783319019918
Publisher: Springer International Publishing
Publication: October 24, 2013
Imprint: Springer
Language: English

Topological Insulators (TIs) are insulators in the bulk, but have exotic metallic states at their surfaces. The topology, associated with the electronic wavefunctions of these systems, changes when passing from the bulk to the surface. This work studies, by means of infrared spectroscopy, the low energy optical conductivity of Bismuth based TIs in order to identify the extrinsic charge contribution of the bulk and to separate it from the intrinsic contribution of the surface state carriers. The extensive results presented in this thesis definitely shows the 2D character of the carriers in Bismuth-based topological insulators. The experimental apparatus and the FTIR technique, the theory of optical properties and Surface Plasmon Polaritons, as well as sample preparation of both crystals and thin films, and the analysis procedures are thoroughly described.

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Topological Insulators (TIs) are insulators in the bulk, but have exotic metallic states at their surfaces. The topology, associated with the electronic wavefunctions of these systems, changes when passing from the bulk to the surface. This work studies, by means of infrared spectroscopy, the low energy optical conductivity of Bismuth based TIs in order to identify the extrinsic charge contribution of the bulk and to separate it from the intrinsic contribution of the surface state carriers. The extensive results presented in this thesis definitely shows the 2D character of the carriers in Bismuth-based topological insulators. The experimental apparatus and the FTIR technique, the theory of optical properties and Surface Plasmon Polaritons, as well as sample preparation of both crystals and thin films, and the analysis procedures are thoroughly described.

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