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- DescriptionChristian Pauly demonstrates the strong topological properties of the techlogically 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 nasecond-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.
- Author BiographyChristian 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.
- Author(s)Christian Pauly
- PublisherSpringer Fachmedien Wiesbaden
- Date of Publication23/01/2016
- SubjectTechnology: General & Reference
- Series TitleMatwerk
- Place of PublicationWeisbaden
- Country of PublicationGermany
- ImprintSpringer Spektrum
- Content Note24 black & white illustrations, 53 colour illustrations, 53 colour tables, biography
- Weight238 g
- Width148 mm
- Height210 mm
- Spine10 mm
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