scholarly journals Equal Footing of Thermal Expansion and Electron-Phonon Interaction in the Temperature Dependence of Lead Halide Perovskite Band Gaps

2019 ◽  
Author(s):  
Alejandro R. Goñi ◽  
Adrián Francisco-López ◽  
Bethan Charles ◽  
Oliver J. Weber ◽  
M. Isabel Alonso ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Temperature Dependence ◽  
Band Gaps ◽  
Phonon Interaction ◽  
Equal Footing ◽  
Electron Phonon Interaction ◽  
Halide Perovskite ◽  
Lead Halide

scholarly journals Equal Footing of Thermal Expansion and Electron–Phonon Interaction in the Temperature Dependence of Lead Halide Perovskite Band Gaps

2019 ◽  
Vol 10 (11) ◽  
pp. 2971-2977 ◽  
Author(s):  
Adrián Francisco-López ◽  
Bethan Charles ◽  
Oliver J. Weber ◽  
M. Isabel Alonso ◽  
Miquel Garriga ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Temperature Dependence ◽  
Band Gaps ◽  
Phonon Interaction ◽  
Equal Footing ◽  
Electron Phonon Interaction ◽  
Halide Perovskite ◽  
Lead Halide

Temperature dependence of band gaps in semiconductors: Electron-phonon interaction

2012 ◽  
Vol 86 (19) ◽  
Author(s):  
J. Bhosale ◽  
A. K. Ramdas ◽  
A. Burger ◽  
A. Muñoz ◽  
A. H. Romero ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Band Gaps ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

scholarly journals Temperature dependence of the dielectric function and critical points of α-SnS from 27 to 350 K

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hoang Tung Nguyen ◽  
Van Long Le ◽  
Thi Minh Hai Nguyen ◽  
Tae Jung Kim ◽  
Xuan Au Nguyen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Dependence ◽  
Dielectric Function ◽  
Spectral Energy ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Temperature Dependences ◽  
Exciton Effect ◽  
Bose Einstein ◽  
Temperature Gradient Method

Abstract We report the temperature dependence of the dielectric function ε = ε1 + iε2 and critical point (CP) energies of biaxial α-SnS in the spectral energy region from 0.74 to 6.42 eV and temperatures from 27 to 350 K using spectroscopic ellipsometry. Bulk SnS was grown by temperature gradient method. Dielectric response functions were obtained using multilayer calculations to remove artifacts due to surface roughness. We observe sharpening and blue-shifting of CPs with decreasing temperature. A strong exciton effect is detected only in the armchair direction at low temperature. New CPs are observed at low temperature that cannot be detected at room temperature. The temperature dependences of the CP energies were determined by fitting the data to the phenomenological expression that contains the Bose–Einstein statistical factor and the temperature coefficient for describing the electron–phonon interaction.

THE TEMPERATURE DEPENDENCE OF THE ENERGY LEVELS OF SHALLOW DONOR IMPURITIES IN SILICON

1967 ◽  
Vol 45 (4) ◽  
pp. 1421-1438 ◽  
Author(s):  
C. Y. Cheung ◽  
Robert Barrie
Keyword(s):  
Temperature Dependence ◽  
Energy Levels ◽  
Electronic States ◽  
Shallow Donor ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Doped Silicon ◽  
Phosphorus Doped

A calculation is made of the temperature dependence of the energy levels of shallow donor impurities in silicon. This temperature dependence arises from the electron–phonon interaction and we consider mixing only of the {1s}, {2s), and {2p0} electronic states. A comparison is made with experiment for the case of phosphorus-doped silicon.

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