Open AccessЭкситоны и трионы в двухслойных ван-дер-ваальсовых гетероструктурах
Author(s) -
М.А. Семина
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.11.48434.531
Subject(s) - exciton , coulomb , binding energy , trion , dielectric function , bilayer , electron , simple (philosophy) , interaction energy , condensed matter physics , physics , dielectric , atomic physics , chemistry , quantum mechanics , molecule , biochemistry , philosophy , epistemology , membrane
The theoretical study of excitons and trions in bilayer structures based on transitional metal diсhalcogenides is carried out. The expressions for effective interaction between charge carriers in such a system with taking into account the dielectric contrast had been obtained. The simple and physically relevant trial functions for electron-hole complexes were suggested. The variational calculation of the dependences of exciton and trion binding energies on the interlayer separation was made with taking into account the details of the screening of the Coulomb interaction. The accuracy of the variational approach is validated by the direct numerical calculation of the exciton binding energy as a function of the interlayer distance.