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Strong and Weak Topology Probed by Surface Science

Topological Insulator Properties of Phase Change Alloys and Heavy Metal Graphene

Christian Pauly (Autor)

Buch | Softcover

VIII, 166 Seiten

2016 | 1st ed. 2015
Springer Fachmedien Wiesbaden GmbH (Verlag)
978-3-658-11810-5 (ISBN)

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Christian Pauly demonstrates the strong topological properties of the technologically relevant phase change materials Sb 2 Te 3 and Ge 2 Sb 2 Te 5 by using two powerful techniques for mapping the surface electronic structure: scanning tunneling spectroscopy (STS) and angle-resolved photoemission spectroscopy (ARPES). In the case of a phase change material, this opens up the possibility of switching between an insulating amorphous and a conducting topological phase on nanosecond-time scales. Moreover, the author presents first experimental results of a weak topological insulator, namely on the bismuth-based graphene-like sheet system Bi 14 Rh 3 I 9 , revealing a topologically protected one-dimensional edge channel as its fingerprint. The edge state is as narrow as 0.8 nm, making it extremely attractive to device physics. Those strong and weak topological insulators are a new phase of quantum matter giving rise to robust boundary states which are protected from backscattering and localization.

Christian Pauly is working as a postdoc in the II. Institute of physics B of the RWTH Aachen University. His work focuses on the study of the topological properties of graphene-like sheet systems which belong to the class of weak topological insulators.

Introduction.- Fundamentals of Topological Insulators.- Experimental Methods.- Identification of Tellurium based Phase-Change Materials as Strong Topological Insulators.- Weak Topological Insulator.- Summary.

Erscheinungsdatum	12.01.2016
Reihe/Serie	MatWerk
Zusatzinfo	VIII, 166 p. 77 illus., 53 illus. in color.
Verlagsort	Wiesbaden
Sprache	englisch
Maße	148 x 210 mm
Themenwelt	Naturwissenschaften ► Chemie ► Analytische Chemie
	Naturwissenschaften ► Physik / Astronomie ► Atom- / Kern- / Molekularphysik
	Naturwissenschaften ► Physik / Astronomie ► Festkörperphysik
	Technik
Schlagworte	angle-resolved photoemission spectroscopy • ARPES • atomic scale mapping • nanoscale science and technology • Phase Change Material • Physics and Astronomy • Scanning Tunneling Microscopy • Solid state physics • Spectroscopy and Microscopy • STM • weak topological insulator
ISBN-10	3-658-11810-5 / 3658118105
ISBN-13	978-3-658-11810-5 / 9783658118105
Zustand	Neuware