Open AccessГальваномагнитные свойства и термоэдс ультратонких пленок системы висмут--сурьма на подложке из слюды
Author(s) -
В.А Герега,
А.В Суслов,
В.А Комаров,
В.М Грабов,
Е.В Демидов,
А.В Колобов
Publication year - 2022
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2022.01.51810.26
Subject(s) - bismuth , antimony , seebeck coefficient , materials science , thermoelectric effect , mica , electrical resistivity and conductivity , substrate (aquarium) , condensed matter physics , conductivity , thermoelectric materials , analytical chemistry (journal) , metallurgy , thermal conductivity , composite material , thermodynamics , chemistry , electrical engineering , oceanography , physics , geology , engineering , chromatography
The study of the electronic properties of ultrathin filmsof pure bismuth and bismuth-antimony alloys is of interest, sincean increase in conductivity with decreasing sample thickness wasfound. This paper presents the results of an experimental studyof the structure, electrical, galvanomagnetic and thermoelectricproperties of pure bismuth and Bi1−x Sbx thin films (x = 0.05 and0.12) on a mica substrate in the thickness range of 10−30 nm.An increase in the conductivity with a decrease in the thicknessof the samples was found. It may be due to the presence oftopologically protected surface states. It is shown that the featuresof the manifestation of this effect are significantly influenced by thealloys band structure. The form of the temperature dependencesof the Seebeck coefficient casts doubt on the fact that surfacestates have a positive effect on the thermoelectric efficiencyof thin bismuth-antimony films. However, the detection of apositive thermoelectric power in Bi0.88Sb0.12 samples can becomean important factor for searching for the possibility of creating ap-branch of thermoelectric converters.