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Strong and Weak Topology Probed by Surface Science: Topological Insulator Properties of Phase Change Alloys and Heavy Metal Graphene: MatWerk

Autor Christian Pauly
en Limba Engleză Paperback – 30 ian 2016
Christian Pauly demonstrates the strong topological properties of the technologically relevant phase change materials Sb2Te3 and Ge2Sb2Te5 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 Bi14Rh3I9, 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.
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Specificații

ISBN-13: 9783658118105
ISBN-10: 3658118105
Pagini: 166
Ilustrații: VIII, 166 p. 77 illus., 53 illus. in color.
Dimensiuni: 148 x 210 x 10 mm
Greutate: 0.22 kg
Ediția:1st ed. 2015
Editura: Springer Fachmedien Wiesbaden
Colecția Springer
Seria MatWerk

Locul publicării:Wiesbaden, Germany

Public țintă

Research

Cuprins

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

Notă biografică

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.

Textul de pe ultima copertă

Christian Pauly demonstrates the strong topological properties of the technologically relevant phase change materials Sb2Te3 and Ge2Sb2Te5 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 Bi14Rh3I9, 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.
 Contents
  • Fundamentals of topological insulators
  • Experimental methods
  • Identification of tellurium based phase change materials as strong topological insulators
  • Weak topological insulators
 Target Groups
  • Researchers and students from the fields of
physics, especially condensed materials
 
About the AuthorChristian 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.

Caracteristici

Publication in the field of natural sciences