Open AccessРаскрытие энергетической щели в области точки Дирака при осаждении кобальта на поверхность (0001) топологического изолятора BiSbTeSe-=SUB=-2-=/SUB=-
Author(s) -
А.К. Кавеев,
А.Г Банщиков,
А.Н. Терпицкий,
В.А Голяшов,
О.Е Терещенко,
К.А Кох,
Д.А Естюнин,
А.М Шикин
Publication year - 2020
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2020.09.49821.13
Subject(s) - molecular beam epitaxy , topological insulator , band gap , range (aeronautics) , condensed matter physics , deposition (geology) , position (finance) , physics , materials science , epitaxy , nanotechnology , geology , paleontology , finance , layer (electronics) , sediment , economics , composite material
It was shown for the first time that Co subnanometer coaverage, being deposited by molecular beam epitaxy method onto the (0001) surface of the BiSbTeSe2 topological insulator at 330 °C, opens an energy band gap in the spectrum of topological surface states in the region of the Dirac point, with a shift in the position of the Dirac point caused by preliminary deposition of the adsorbate at room temperature. The gap band width is 21 +/- 6 meV. Temperature-dependent measurements in the 15-150 K range did not show any width changes.