TY  - SER
AU  - Polyakov,A.
AU  - Crozier,E.Daryl
AU  - Gordon,R.A.
AU  - Mohseni,Katayoon
AU  - Roy,S.
AU  - Ernst,Arthur
AU  - Vergniory,M.G.
AU  - Zubizarreta,X.
AU  - Otrokov,Mikhail M.
AU  - Meyerheim,Holger L.
AU  - Chulkov,Evgueni V.
AU  - Kirschner,Jürgen
TI  - Surface alloying and iron selenide formation in Fe/Bi2Se3(0001) observed by x-ray absorption fine structure experiments
KW  - селенид железа
KW  - поверхностное легирование
KW  - топологические изоляторы
KW  - ультратонкие пленки
KW  - статьи в журналах
N1  - Библиогр.: 58 назв
N2  - The atomic structure of ultrathin iron films deposited on the (0001) surface of the topological insulator Bi2Se3 is analyzed by surface x-ray absorption spectroscopy. Iron atoms deposited on a Bi2Se3 (0001) surface kept at 160 K substitute bismuth atoms within the first quintuple layer. Iron atoms are neighbored by six selenium atoms at a distance in the 2.4 Å range indicating substantial atomic relaxations. Mild annealing up to 520 K leads to the formation of α-FeSe, characterized by a local order extending up to the sixth shell (5.80 Å). Ab initio calculations predict a noncollinear magnetic ordering with a transition temperature of 3.5–10 K depending on the iron concentration and the number of the layers in which Fe is located
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000578006
ER  -