Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling
The influence of electron correlations (direct dependence of electronic wave function on distance between electrons) on energy spectra of two-electron systems (D-, F ', F₂-centers and bipolarons) in polar crystals with strong electron-phonon interaction is investigated. Bipolaron is chosen as t...
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| Дата: | 2002 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2002
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| Назва видання: | Semiconductor Physics Quantum Electronics & Optoelectronics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/121239 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling / N.I. Kashirina, V.D. Lakhno, V.V. Sychyov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2002. — Т. 5, № 3. — С. 235-242. — Бібліогр.: 21 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1212392017-06-14T03:06:48Z Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling Kashirina, N.I. Lakhno, V.D. Sychyov, V.V. The influence of electron correlations (direct dependence of electronic wave function on distance between electrons) on energy spectra of two-electron systems (D-, F ', F₂-centers and bipolarons) in polar crystals with strong electron-phonon interaction is investigated. Bipolaron is chosen as the simplest model of two-electron system in the crystal. Bipolaron energy is calculated for various distances between the centers of polarization wells of two polarons with accounting the electron correlations. A singlet bipolaron is stable at rather high energy of ion binding η ≤ ηm ≈ 0,143 (η= ε∞/ η₀). The unique energy minimum corresponds to a one-center bipolaron (an analog of a helium atom). The bipolaron binding energy constitutes up to 25.8% of a double polaron energy at η → 0. A triplet bipolaron (an analog of orthohelium) is energetically disadvantageous. The one-center configuration of a triplet bipolaron corresponds to a maximum on the distance dependence of the total energy JBp(R). The exchange interaction between polarons has antiferromagnetic character. A prediction is made about a possibility of the Wigner crystallization of a polaron gas, which occurs with antiferromagnetic ordering in the polaron system. The examples of energy calculations with accounting the electron correlations of exchanged-coupled pairs, D- and F '-centers in polar crystals are also given. 2002 Article Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling / N.I. Kashirina, V.D. Lakhno, V.V. Sychyov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2002. — Т. 5, № 3. — С. 235-242. — Бібліогр.: 21 назв. — англ. 1560-8034 PACS: 71.38, 73.20.D, 74.80.D http://dspace.nbuv.gov.ua/handle/123456789/121239 en Semiconductor Physics Quantum Electronics & Optoelectronics Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
The influence of electron correlations (direct dependence of electronic wave function on distance between electrons) on energy spectra of two-electron systems (D-, F ', F₂-centers and bipolarons) in polar crystals with strong electron-phonon interaction is investigated. Bipolaron is chosen as the simplest model of two-electron system in the crystal. Bipolaron energy is calculated for various distances between the centers of polarization wells of two polarons with accounting the electron correlations. A singlet bipolaron is stable at rather high energy of ion binding η ≤ ηm ≈ 0,143 (η= ε∞/ η₀). The unique energy minimum corresponds to a one-center bipolaron (an analog of a helium atom). The bipolaron binding energy constitutes up to 25.8% of a double polaron energy at η → 0. A triplet bipolaron (an analog of orthohelium) is energetically disadvantageous. The one-center configuration of a triplet bipolaron corresponds to a maximum on the distance dependence of the total energy JBp(R). The exchange interaction between polarons has antiferromagnetic character. A prediction is made about a possibility of the Wigner crystallization of a polaron gas, which occurs with antiferromagnetic ordering in the polaron system. The examples of energy calculations with accounting the electron correlations of exchanged-coupled pairs, D- and F '-centers in polar crystals are also given. |
| format |
Article |
| author |
Kashirina, N.I. Lakhno, V.D. Sychyov, V.V. |
| spellingShingle |
Kashirina, N.I. Lakhno, V.D. Sychyov, V.V. Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling Semiconductor Physics Quantum Electronics & Optoelectronics |
| author_facet |
Kashirina, N.I. Lakhno, V.D. Sychyov, V.V. |
| author_sort |
Kashirina, N.I. |
| title |
Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling |
| title_short |
Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling |
| title_full |
Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling |
| title_fullStr |
Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling |
| title_full_unstemmed |
Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling |
| title_sort |
investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling |
| publisher |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| publishDate |
2002 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/121239 |
| citation_txt |
Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling / N.I. Kashirina, V.D. Lakhno, V.V. Sychyov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2002. — Т. 5, № 3. — С. 235-242. — Бібліогр.: 21 назв. — англ. |
| series |
Semiconductor Physics Quantum Electronics & Optoelectronics |
| work_keys_str_mv |
AT kashirinani investigationofelectroncorrelationeffectonenergyspectrumoftwoelectronsystemsincrystalswithstrongelectronphononcoupling AT lakhnovd investigationofelectroncorrelationeffectonenergyspectrumoftwoelectronsystemsincrystalswithstrongelectronphononcoupling AT sychyovvv investigationofelectroncorrelationeffectonenergyspectrumoftwoelectronsystemsincrystalswithstrongelectronphononcoupling |
| first_indexed |
2023-10-18T20:38:58Z |
| last_indexed |
2023-10-18T20:38:58Z |
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1796150751639109632 |