Excitonic effects at the temperature-dependent direct bandgap of Ge
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00125891" target="_blank" >RIV/00216224:14310/22:00125891 - isvavai.cz</a>
Result on the web
<a href="https://aip.scitation.org/doi/abs/10.1063/5.0080158" target="_blank" >https://aip.scitation.org/doi/abs/10.1063/5.0080158</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0080158" target="_blank" >10.1063/5.0080158</a>
Alternative languages
Result language
angličtina
Original language name
Excitonic effects at the temperature-dependent direct bandgap of Ge
Original language description
The temperature dependence of the complex dielectric function ????1+????????2 of bulk Ge near the direct bandgap was investigated with spectroscopic ellipsometry at temperatures between 10 and 710 K. Second derivatives of the dielectric function with respect to energy are obtained using a digital linear filter method. A model that incorporates excitonic effects using the Tanguy model for the Hulthén potential [C. Tanguy, Phys. Rev. B 60, 10660 (1999)] was used to fit the dielectric function and its second derivatives simultaneously. Using ????⋅???? theory and literature values for effective masses, reasonable agreement with the experiment is obtained for ????2 up to room temperature using the direct bandgap and its broadening as the only adjustable parameters.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/EF18_053%2F0016952" target="_blank" >EF18_053/0016952: Postdoc2MUNI</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Applied Physics
ISSN
0021-8979
e-ISSN
1089-7550
Volume of the periodical
131
Issue of the periodical within the volume
16
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
1-10
UT code for WoS article
000793144600002
EID of the result in the Scopus database
2-s2.0-85129186351