Excitonic effects at the temperature-dependent direct bandgap of Ge

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Excitonic effects at the temperature-dependent direct bandgap of Ge

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Excitonic effects at the temperature-dependent direct bandgap of Ge

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF18_053%2F0016952" target="_blank" >EF18_053/0016952: Postdoc2MUNI</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Applied Physics

ISSN

0021-8979

e-ISSN

1089-7550

Svazek periodika

131

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000793144600002

EID výsledku v databázi Scopus

2-s2.0-85129186351