کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7907836 | 1510758 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Excitonic spectra in HgGa2Se4 crystals
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Excitonic spectra in HgGa2Se4 crystals Excitonic spectra in HgGa2Se4 crystals](/preview/png/7907836.png)
چکیده انگلیسی
Ground and excited states of four excitonic series (A, B, C and D) were discovered in HgGa2Se4 crystals at 10 K. Parameters of excitons and bands were determined. An effective mass of electrons mc is equal to 0.26m0 and masses of holes mv1, mv2 and mv3 are equal to 2.48m0, 2.68m0 and 1.6m0 respectively in Î point of Brilloin zone. Valence bands splitting by crystal field (Îcf = 70 meV) and spin-orbital interaction (Îso = 250 meV) were estimated in Brillouin zone center. Optical functions (n, ε1 and ε2) for polarizations Eâ¥c and E||c in electron transitions region (2-6 eV) were calculated by Kramers-Kronig method. The discovered features were discussed on a base of the existing theoretical energetical band structure calculations and excitonic bands symmetries in k = 0 Brillouin zone for chalcopyrite crystals. The resonance Raman scattering was investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 76, February 2018, Pages 344-352
Journal: Optical Materials - Volume 76, February 2018, Pages 344-352
نویسندگان
N.N. Syrbu, V.V. Zalamai,