Title: Dirakův kužel a pseudogapped hustota stavů v topologické polovině Heuslerovy sloučeniny YPtBi
Dirac cone and pseudogapped density of states in the topological half-Heusler compound YPtBi
Authors: Kronenberg, Andreas
Braun, Jürgen W.
Minár, Jan
Elmers, Hans Joachim
Kutnyakhov, Dmytro
Zaporozhchenko, Anna V.
Wallauer, Robert
Chernov, Sergey V.
Medjanik, Katerina
Schönhense, Gerd
Kläui, Mathias
Chadov, Stanislav
Ebert, Hubert
Jourdan, Martin
Citation: Physical review B, 2016, roč. 94, č. 16, s. 161108. ISSN 2469-9950.
Issue Date: 2016
Publisher: American Physical Society
Document type: článek
URI: http://hdl.handle.net/11025/25697
ISSN: 2469-9950
Keywords: topologické izolátory;Heuslerovy slitiny
Keywords in different language: Heusler alloys;topological insulators
Abstract: Topologické izolátory (Tis) jsou zajímavé materiály, které vykazují nebývalé vlastnosti. . Zde jsme prozkoumali sloučeniny YPtBi jako příklad ze třídy polovu-Heuslerových materiálů.
Abstract in different language: Topological insulators (TIs) are exciting materials, which exhibit unprecedented properties, such as helical spinmomentum locking, which leads to large torques for magnetic switching and highly efficient spin current detection. Here we explore the compound YPtBi, an example from the class of half-Heusler materials, for which the typical band inversion of topological insulators was predicted. We prepared this material as thin films by conventional cosputtering from elementary targets. By in situ time-of-flight momentum microscopy, a Dirac conelike surface state with a Dirac point 300 meV below the Fermi energy was observed, in agreement with electronic structure-photoemission calculations. Only little additional spectral weight due to other states was observed at EF , which corroborates the identification of the topologically protected surface state and is highly relevant for spintronics applications.
Rights: © American Physical Society
Appears in Collections:Články / Articles (CTM)

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