Christian Pauly

Strong and Weak Topology Probed by Surface Science

Topological Insulator Properties of Phase Change Alloys and Heavy Metal Graphene

• Broschiertes Buch

Produktbeschreibung

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.

Produktdetails

• MatWerk
• Verlag: Springer / Springer Fachmedien Wiesbaden / Springer, Berlin
• Artikelnr. des Verlages: 978-3-658-11810-5
• 1st ed. 2015
• Seitenzahl: 176
• Erscheinungstermin: 30. Januar 2016
• Englisch
• Abmessung: 210mm x 148mm x 10mm
• Gewicht: 237g
• ISBN-13: 9783658118105
• ISBN-10: 3658118105
• Artikelnr.: 43861809

Autorenporträt

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.

Inhaltsangabe

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