Open AccessПричины низкого значения работы выхода гексаборида лантана как эффективного электронного эмиттера
Author(s) -
И.В. Тваури,
И.В. Силаев,
В.Б. Заалишвили,
О.Г. Ашхотов,
З.Т. Созаев,
Т.Т. Магкоев
Publication year - 2022
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2022.06.52202.18903
Subject(s) - lanthanum , materials science , carbon monoxide , nanotechnology , chemistry , inorganic chemistry , biochemistry , catalysis
To establish the mechanism of high emission efficiency of lanthanum hexaboride as one of the most widely used electron emitters, a comparative study of the state of La and B atoms in the La–B double film, on one hand, and in the separate La and B films – on the other, was done via probing the state of such films via carbon monoxide adsorption. It is shown that the formation of the La–B dipole layer on the surface is the main reason for the high emission effectiveness of lanthanum hexaboride. As such, the subnanometer La–B film systems may be promising as electron emitter of a high degree of spatial locality.