Open AccessВоздействие механических напряжений на зарядовое состояние межфазной границы в гетероструктурах LaAlO-=SUB=-3-=/SUB=-/(001)SrTiO-=SUB=-3-=/SUB=- c нарушенной стехиометрией
Author(s) -
Ю.А. Бойков,
I. T. Serenkov,
В. И. Сахаров,
В. А. Данилов
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.01.45305.213
Subject(s) - heterojunction , materials science , stoichiometry , ion , lanthanum , substrate (aquarium) , scattering , electron , layer (electronics) , condensed matter physics , analytical chemistry (journal) , inorganic chemistry , optoelectronics , chemistry , nanotechnology , optics , physics , oceanography , organic chemistry , chromatography , quantum mechanics , geology
The medium-energy ion scattering (MEIS) spectroscopy was used to obtain the data on the structure and stoichiometry of interfaces in LaAlO_3/SrTiO_3 (LAO/STO) heterostructures. The coverage of the LAO/STO heterostructure with a LAO film increased by a factor of almost two as the lanthanum aluminate layer thickness increased from 1 to 6 unit cells. It is shown that the formation of the heterostructure is accompanied by the interchange with Sr ions of the substrate and La ions of the firm. The influence of the oxygen pressure on the formation of the heterostructure has been studied. The conditions required to form nanodimentional interlayer of a quasi-two-dimensional electron gas with high mobility of electrons in the interface region are analyzed.