Iorio, Paolino (2017) Single particle and collective electronic excitations in topological insulator nano- wires. [Tesi di dottorato]

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Item Type:	Tesi di dottorato
Lingua:	English
Title:	Single particle and collective electronic excitations in topological insulator nano- wires
Creators:	Creators Email Iorio, Paolino iorio@fisica.unina.it
Date:	7 April 2017
Number of Pages:	121
Institution:	Università degli Studi di Napoli Federico II
Department:	Fisica
Dottorato:	Fisica
Ciclo di dottorato:	29
Coordinatore del Corso di dottorato:	nome email Capozziello, Salvatore capozzie@na.infn.it
Tutor:	nome email Cataudella, Vittorio UNSPECIFIED Perroni, Carmine Antonio UNSPECIFIED
Date:	7 April 2017
Number of Pages:	121
Uncontrolled Keywords:	Topological insulator; Berry phase; nanowire
Settori scientifico-disciplinari del MIUR:	Area 02 - Scienze fisiche > FIS/03 - Fisica della materia
Date Deposited:	03 May 2017 15:14
Last Modified:	08 Mar 2018 11:08
URI:	http://www.fedoa.unina.it/id/eprint/11573
DOI:	10.6093/UNINA/FEDOA/11573

Abstract

The thesis presents a theoretical study of the confinement effects on the electronic properties of three-dimensional topological insulators (TIs). The focus has been on nano-wires of the prototype compound Bi2Se3. By means of analytical and numerical approaches, starting from a bulk Hamiltonian based on a two-orbital model for the compound, analyzing not only single-electron but also collective electronic excitations such as Dirac magneto-plasmons.We find interesting features with varying the cross-section area, the electron surface density and the strength of an axial magnetic field. An original aspect has been the study of the role played by the Berry phase. It's role in the characterization of both spectral and electronic dielectric properties of TI nano-wires is discussed.

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