Strong and Weak Topology Probed by Surface Science

Anglický jazyk

Strong and Weak Topology Probed by Surface Science

Vydavateľstvo: Springer Fachmedien Wiesbaden
Rok vydania: 2016
Formát: Paperback
Rozmer: 210 x 148 mm
Jazyk: Anglický jazyk
ISBN: 9783658118105

Na objednávku, dodanie 2-4 týždne

49.49 €

bežná cena: 54.99 €

O knihe

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.