Strong and Weak Topology Probed by Surface Science

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Strong and Weak Topology Probed by Surface Science

Christian Pauly - Personal Name;

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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Series Title: -
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Publisher: Cham : Springer., 2015
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Language: English
ISBN/ISSN: 978-3-658-11811-2
Classification: NONE
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Subject(s): Biomedical and Life Sciences
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Statement of Responsibility: Christian Pauly

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Cataloger: Jemadi
Source: https://link.springer.com/content/pdf/10.1007/978-3-658-11811-2.pdf?pdf=button
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