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Superconducting Tin Selenide/Niobium Diselenide Ferecrystals †
Author(s) -
Grosse Corinna,
Alemayehu Matti B.,
Mogilatenko Anna,
Chiatti Olivio,
Johnson David C.,
Fischer Saskia F.
Publication year - 2017
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201700126
Subject(s) - diselenide , selenide , tin , niobium , materials science , transmission electron microscopy , electron diffraction , superconductivity , diffraction , crystallography , chemistry , condensed matter physics , nanotechnology , optics , metallurgy , selenium , physics
X‐ray diffraction, electron diffraction and scanning transmission electron microscopy images prove the structurally independent two‐dimensional layers of precisely m tin selenide bilayers and a single niobium diselenide trilayer in heterostructure thin films with a rotational disorder between them. The superconducting critical temperatures decrease systematically as m , the number of tin selenide layers, increases. However, all are lower than that known for isolated single niobium diselenide layers. This indicates a decoupling of these layers. A possible mechanism is a decrease in the density of states due to charge donation from the tin selenide layer.