Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductor
The energy expediency of the existence of Er1-xScxNiSb substitutional solid solution up to the concentration x≈0.10 was established by modeling the variation of free energy ΔG(x) values (Helmholtz potential). At higher Sc concentrations, x> 0.10, there is stratification (spinoidal decomposition o...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Vasyl Stefanyk Precarpathian National University
2021-09-01
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| Series: | Фізика і хімія твердого тіла |
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| Online Access: | https://journals.pnu.edu.ua/index.php/pcss/article/view/4947 |
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| author | Yu. Stadnyk V.A. Romaka A. Horyn V.V. Romaka L. Romaka P. Klyzub V. Pashkevych P. Gorpenyuk |
| author_facet | Yu. Stadnyk V.A. Romaka A. Horyn V.V. Romaka L. Romaka P. Klyzub V. Pashkevych P. Gorpenyuk |
| author_sort | Yu. Stadnyk |
| collection | DOAJ |
| description | The energy expediency of the existence of Er1-xScxNiSb substitutional solid solution up to the concentration x≈0.10 was established by modeling the variation of free energy ΔG(x) values (Helmholtz potential). At higher Sc concentrations, x> 0.10, there is stratification (spinoidal decomposition of phase). It is shown that in the structure of p-ErNiSb semiconductor there are vacancies in positions 4a and 4c of Er and Ni atoms, respectively, generating structural defects of acceptor nature. The number of vacancies in position 4a is twice less than in position 4c. This ratio also remains for p-Er1-xScxNiSb. Doping of p-ErNiSb semiconductor by Sc atoms by substitution of Er atoms is also accompanied by the occupation of vacancies in position 4a. In this case, Ni atoms occupy vacancies in position 4c, which can be accompanied by the process of ordering the p-Er1-xScxNiSb structure. Occupation of vacancies by Sc and Ni atoms leads to an increase of the concentration of free electrons, an enlarge of the compensation degree of semiconductor, which changes the position of the Fermi level εF and the mechanisms of electrical conductivity. |
| first_indexed | 2024-04-11T17:31:52Z |
| format | Article |
| id | doaj.art-0423ef0b4ff941b8874d71ab7e1d8bf2 |
| institution | Directory Open Access Journal |
| issn | 1729-4428 2309-8589 |
| language | English |
| last_indexed | 2024-04-11T17:31:52Z |
| publishDate | 2021-09-01 |
| publisher | Vasyl Stefanyk Precarpathian National University |
| record_format | Article |
| series | Фізика і хімія твердого тіла |
| spelling | doaj.art-0423ef0b4ff941b8874d71ab7e1d8bf22022-12-22T04:11:58ZengVasyl Stefanyk Precarpathian National UniversityФізика і хімія твердого тіла1729-44282309-85892021-09-0122350951510.15330/pcss.22.3.509-5154947Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductorYu. Stadnyk0V.A. Romaka1A. Horyn2V.V. Romaka3L. Romaka4P. Klyzub5V. Pashkevych6P. Gorpenyuk7Ivan Franko National University of LvivLviv Polytechnic National UniversityIvan Franko National University of LvivTechnische Universität DresdenIvan Franko National University of LvivIvan Franko National University of LvivLviv Polytechnic National UniversityLviv Polytechnic National UniversityThe energy expediency of the existence of Er1-xScxNiSb substitutional solid solution up to the concentration x≈0.10 was established by modeling the variation of free energy ΔG(x) values (Helmholtz potential). At higher Sc concentrations, x> 0.10, there is stratification (spinoidal decomposition of phase). It is shown that in the structure of p-ErNiSb semiconductor there are vacancies in positions 4a and 4c of Er and Ni atoms, respectively, generating structural defects of acceptor nature. The number of vacancies in position 4a is twice less than in position 4c. This ratio also remains for p-Er1-xScxNiSb. Doping of p-ErNiSb semiconductor by Sc atoms by substitution of Er atoms is also accompanied by the occupation of vacancies in position 4a. In this case, Ni atoms occupy vacancies in position 4c, which can be accompanied by the process of ordering the p-Er1-xScxNiSb structure. Occupation of vacancies by Sc and Ni atoms leads to an increase of the concentration of free electrons, an enlarge of the compensation degree of semiconductor, which changes the position of the Fermi level εF and the mechanisms of electrical conductivity.https://journals.pnu.edu.ua/index.php/pcss/article/view/4947semiconductorelectrical conductivitythermopower coefficientfermi lervel |
| spellingShingle | Yu. Stadnyk V.A. Romaka A. Horyn V.V. Romaka L. Romaka P. Klyzub V. Pashkevych P. Gorpenyuk Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductor Фізика і хімія твердого тіла semiconductor electrical conductivity thermopower coefficient fermi lervel |
| title | Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductor |
| title_full | Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductor |
| title_fullStr | Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductor |
| title_full_unstemmed | Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductor |
| title_short | Modeling of structural and energetic parameters of р-Er1-xScxNiSb semiconductor |
| title_sort | modeling of structural and energetic parameters of р er1 xscxnisb semiconductor |
| topic | semiconductor electrical conductivity thermopower coefficient fermi lervel |
| url | https://journals.pnu.edu.ua/index.php/pcss/article/view/4947 |
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