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

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Tipologia del documento:	Tesi di dottorato
Lingua:	English
Titolo:	Single particle and collective electronic excitations in topological insulator nano- wires
Autori:	Autore Email Iorio, Paolino iorio@fisica.unina.it
Data:	7 Aprile 2017
Numero di pagine:	121
Istituzione:	Università degli Studi di Napoli Federico II
Dipartimento:	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 [non definito] Perroni, Carmine Antonio [non definito]
Data:	7 Aprile 2017
Numero di pagine:	121
Parole chiave:	Topological insulator; Berry phase; nanowire
Settori scientifico-disciplinari del MIUR:	Area 02 - Scienze fisiche > FIS/03 - Fisica della materia
Depositato il:	03 Mag 2017 15:14
Ultima modifica:	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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