2. Ερευνητικές - Επιστημονικές Δημοσιεύσεις του Ακαδημαϊκού Προσωπικού
Μόνιμο URI για αυτήν την κοινότηταhttps://repository2024.ihu.gr/handle/123456789/30486
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Πλοήγηση 2. Ερευνητικές - Επιστημονικές Δημοσιεύσεις του Ακαδημαϊκού Προσωπικού ανά Συγγραφέα "Anagnostopoulos, Antonios"
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Τεκμήριο Excitonic and other interband transitions in TlIn2 single crystals(1993) Kalomiros, John; Anagnostopoulos, AntoniosA study of the optical properties of the layered compound TlInS2 is presented. Reflection spectra were measured at room temperature, in the energy region 1.5-6.2 eV. Transmission spectra were measured in the temperature range 10-290K, in the energy region 1.5 to 3.5 eV. Two structures, at energy positions 2.57 and 2.87 eV (10K), are attributed to transitions to the ground exciton state, from valence states split because of the spin-orbit interaction, at the point G of the Brillouin zone. Lorentzian line shapes are used to fit the structures of excitonic origin. The temperature dependence of the peaks and their broadening parameters are also presented.Τεκμήριο Optical and photoelectrical properties of the TlGaS2 ternary compound(1996) Kalkan, Nevin; Kalomiros, John; Hanias, M.; Anagnostopoulos, AntoniosAbsorption and photoconductivity spectra of thin TlGaS2 layers are used to study tbe fundamental and other transitions of TlGaS2 in the energy region 1.0-3.0 eV and in the temperature range lo-300 K. One of the peaks resolved by photoconductivity measurements corresponds to the excitonic peak registered in the absorption spectrum of this compound. The temperature dependence of the critical energy and of the broadening parameter of this excitonic peak are presented. Most of the rest photoconductivity peaks are related to transitions from localized levels to the conduction band.