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періодичних видань НАН України
Investigations on temperature dependences of parameters of ¹²⁷I NQR spectrum of (BiI₃)(₁₋ₓ)(PbI₂)ₓ mixed layered semiconductor and alkaline halogens crystals
Репозиторій DSpace/Manakin
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Investigations on temperature dependences of parameters of ¹²⁷I NQR spectrum of (BiI₃)(₁₋ₓ)(PbI₂)ₓ mixed layered semiconductor and alkaline halogens crystals
Тема:
Characterization and properties
Інший ID:
DOI: https://doi.org/10.15407/fm24.03.360
Посилання:
Investigations on temperature dependences of parameters of ¹²⁷I NQR spectrum of (BiI₃)(₁₋ₓ)(PbI₂)ₓ mixed layered semiconductor and alkaline halogens crystals / I.G. Vertegel, E.D. Chesnokov, O.I. Ovcharenko, I.I. Vertegel, O.S. Ivanov, Yu.P. Gnatenko, O.A. Ponkratenko // Functional Materials. — 2017. — Т. 24, № 3. — С. 360-364. — Бібліогр.: 15 назв. — англ.
Дата:
2017
Переглядів:
675
Завантажень:
491
Анотація:
Results of investigations of the temperature dependence of NQR frequencies in the temperature range of 4.2-150 K for ¹²⁷I and ⁷⁹Br of the (BiI₃)(₁₋ₓ)(PbI₂)ₓ mixed layered semiconductor and the crystals of alkaline halogens are presented. The abnormally large absolute values of temperature coefficients of the NQR frequency for (BiI₃)(₁₋ₓ)(PbI₂)ₓ have been detected. It can be explained by influence of the point charges and interlayer fluctuations. It is concluded that the quasi-two-dimensional nature of the vibration states at PbI₂ contents of x ≤0.08 is persistent. The value of the orientation and translational vibrations frequency of the halogen ions assuming the correctness of the two-frequency model Bayer-Kushida has been calculated.
