Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots
A spherical quantum dot (QD) heterosystem CdS/SiO2 has been studied. Each QD has a hydrogen-like impurity in its center. Besides that, it has been accounted that a polarization trap for electron exists at the interfaces due to the difference between the QD and matrix dielectric permittivity. It ha...
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| Дата: | 2017 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
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Інститут фізики конденсованих систем НАН України
2017
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/157030 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots / V.I. Boichuk, R.Ya. Leshko, D.S. Karpyn // Condensed Matter Physics. — 2017. — Т. 20, № 4. — С. 43704: 1–8. — Бібліогр.: 18 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1570302019-06-20T01:27:33Z Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots Boichuk, V.I. Leshko, R.Ya. Karpyn, D.S. A spherical quantum dot (QD) heterosystem CdS/SiO2 has been studied. Each QD has a hydrogen-like impurity in its center. Besides that, it has been accounted that a polarization trap for electron exists at the interfaces due to the difference between the QD and matrix dielectric permittivity. It has been defined that for small QD radii there are surface electron states. For different radii, partial contributions of the surface states into the electron energy caused by the electron-ion and electron-polarization charges interaction have been defined. The linear light absorption coefficient of noninteracting QDs has been calculated taking into account the QD dispersion by the size. It is shown that the surface states can be observed into different ranges of an electromagnetic spectrum. У роботi дослiджується наногетеросистема сферичних квантових точок (КТ) CdS у матрицi SiO2. Кожна КТ у центрi мiстить водневоподiбну домiшку. Крiм того, враховано, що бiля меж подiлу через рiзницю дiелектричних проникностей виникає поляризацiйна пастка для електрона. Встановлено, що для малих радiусiв КТ iснують поверхневi електроннi стани. Для рiзних радiусiв КТ обчислено парцiальнi внески в енергiю зв’язку поверхневих станiв вiд взаємодiї електрона з iоном домiшки та поляризацiйними зарядами. Проведено обчислення коефiцiєнта мiжрiвневого поглинання гетеросистеми з невзаємодiючими КТ, враховуючи їх дисперсiю за розмiрами. Показано, що поверхневi стани проявляються в рiзних областях спектру. 2017 Article Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots / V.I. Boichuk, R.Ya. Leshko, D.S. Karpyn // Condensed Matter Physics. — 2017. — Т. 20, № 4. — С. 43704: 1–8. — Бібліогр.: 18 назв. — англ. 1607-324X PACS: 73.21.La, 78.20.Ci DOI:10.5488/CMP.20.43704 arXiv:1712.05362 http://dspace.nbuv.gov.ua/handle/123456789/157030 en Condensed Matter Physics Інститут фізики конденсованих систем НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
A spherical quantum dot (QD) heterosystem CdS/SiO2 has been studied. Each QD has a hydrogen-like impurity
in its center. Besides that, it has been accounted that a polarization trap for electron exists at the interfaces due
to the difference between the QD and matrix dielectric permittivity. It has been defined that for small QD radii
there are surface electron states. For different radii, partial contributions of the surface states into the electron
energy caused by the electron-ion and electron-polarization charges interaction have been defined. The linear
light absorption coefficient of noninteracting QDs has been calculated taking into account the QD dispersion
by the size. It is shown that the surface states can be observed into different ranges of an electromagnetic
spectrum. |
| format |
Article |
| author |
Boichuk, V.I. Leshko, R.Ya. Karpyn, D.S. |
| spellingShingle |
Boichuk, V.I. Leshko, R.Ya. Karpyn, D.S. Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots Condensed Matter Physics |
| author_facet |
Boichuk, V.I. Leshko, R.Ya. Karpyn, D.S. |
| author_sort |
Boichuk, V.I. |
| title |
Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots |
| title_short |
Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots |
| title_full |
Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots |
| title_fullStr |
Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots |
| title_full_unstemmed |
Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots |
| title_sort |
analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
2017 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/157030 |
| citation_txt |
Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots / V.I. Boichuk, R.Ya. Leshko, D.S. Karpyn // Condensed Matter Physics. — 2017. — Т. 20, № 4. — С. 43704: 1–8. — Бібліогр.: 18 назв. — англ. |
| series |
Condensed Matter Physics |
| work_keys_str_mv |
AT boichukvi analysisoftheeffectofpolarizationtrapsandshallowimpuritiesontheinterlevellightabsorptionofquantumdots AT leshkorya analysisoftheeffectofpolarizationtrapsandshallowimpuritiesontheinterlevellightabsorptionofquantumdots AT karpynds analysisoftheeffectofpolarizationtrapsandshallowimpuritiesontheinterlevellightabsorptionofquantumdots |
| first_indexed |
2023-05-20T17:51:16Z |
| last_indexed |
2023-05-20T17:51:16Z |
| _version_ |
1796154246018629632 |