Temperature and concentration dependence of the parameters of the 127I NQR spectrum of the (BiI3)1–x (PbI2) x mixed layered semiconductor

I127 NQR spectra of Pb1–xCdxI2 and (BiI3)(1–x)(PbI2)x of mixed layered semiconductors

“…With increasing the PbI 2 content in the crystal (BiI 3 ) ( It must be noted that the value of the constants e 2 Qq zz in the crystal (BiI 3 ) (1-х) (PbI 2 ) х in the range of content x (0 ≤ x ≤ 0.10) does not change within the measurement error [5]. For crystals PbI 2 at Т = 77 K, it was revealed that the value of e 2 Qq zz is 29.83 MHz, and the asymmetry parameter of the (EFGT) is equal to zero.…”

“…Therefore, the fact that, in the range of content CdI 2 0.1 < x < 1 in crystals Pb 1-x Cd x I 2 and in the range of content PbI 2 х ≥ 0.2 in crystals (BiI 3 ) (1-х) (PbI 2 ) х the line ν with the parameters e 2 Qq zz = 682.18 MHz and η = 0.29 was not observed, can testify to a considerable reduction of the number of I 127 resonance nuclei that are responsible for this line. It was received [5] It is known that for an intracrystalline field with the asymmetry parameter η = 0 [1] ( )…”

“…The absorption and reflectance spectra as well as X-ray structural analysis of (BiI 3 ) 1-x (PbI 2 ) x mixed crystals, photoluminescence spectra were studied in [3,4]. The I 127 nuclear quadrupole resonance (NQR) spectra of chemically pure BiI 3 crystals and mixed layered semiconductor were studied in [5][6][7][8].…”