2021   01   az   p.44-46 Sh.K. Qudavasov1,2, N.A. Abdullayev1,3, J.N. Jalilli1, Y.A. Abdullayev1, Z.I. Badalova1,
I.A. Mammadova1,
Optical properties of Bi2Se3 and Bi2Se3‹Cu›		  pdf 

ABSTRACT

In this work, by spectroscopic ellipsometry the imaginary and real parts of the dielectric function of Bi2Se3 and Bi2Se3‹Cu› single crystals were obtained in the photon energy range from 0.7 eV to 6.5 eV, and were determined the energies of allowed direct transitions. By the help of Cody-Lorentz and Lorentz optical oscillators, the dispersion relation is adjusted in conformity with the experimental data. It was also determined that the maximum absorption corresponds to the transitions at 1.900 eV and 1.949 eV for Bi2Se3 and Bi2Se3‹Cu›, respectively.

Keywords: spectral ellipsometry, ellipsometric angles, photon energy, elliptical polarization, reflection coefficients, spectral line, oscillator
PACS: 78.20.-e, 78.20.Ci

DOI:-

Received: 03.02.2021

AUTHORS & AFFILIATIONS

1. Institute of Physics of Azerbaijan National Academy of Sciences, 131 H. Javid ave, Baku, AZ-1143, Azerbaijan
2. French-Azerbaijani University, 183 Nizami Street, Baku, Azerbaijan
3. Baku State University, 23 Z. Khalilov st., Baku, AZ 1148, Azerbaijan
E-mail: shamilkamal1989@gmail.com 		[1]   İ.A. Nechaev, R.C. Hatch, M. Bianchi, D. Guan, C. Friedrich, I. Aguilera, J.L. Mi, B.B. Iversen, S. Blügel, Ph. Hofmann və E.V. Çulkov. Phys. Rev. B87 , 2013, 121111 (5s.).
[2]   A. Bayramov, G. M. Əhmədov, N.A. Səfərov, S.M. Bayramova. AJP FİZİKA, 13 (4), 2007, 156-158.
[3]   A.P. Kirk. Günəş fotovoltaik hüceyrələri: Fotonlar elektrik enerjisinə. Akademik Mətbuat, 138r. 2015.
[4]   P. Lautenschlager, M. Garriga, L. Vina, M. Cardona. Phys. Rev.B 36, 1987, 4821-4830.
[5]   A.Yu. Qamzaeva, E.G. Əlizadə, N.T. Məmmədov, N.A. Abdullaev, I.R. Əmiraslanov,Y.N. Əlieva, H.N. Əhmədova, G.X. Əjdarov, K.Ş. Kaxramanov, S.A. Nemov. Yarımkeçiricilərin Fizikası və Texnologiyası, 53 (2), 2019, 235-240.
[6]   M. Cardona. Modulyasiya spektroskopiyası. Akademik Mətbuat, 358s.,1969; M. Cordona, Modulyasiya Spektroskopiyası, M., Mir, 1972.