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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| Published in: | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Date: | 2002 |
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
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Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2002
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/121239 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | 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. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862641023960743936 |
|---|---|
| author | Kashirina, N.I. Lakhno, V.D. Sychyov, V.V. |
| author_facet | Kashirina, N.I. Lakhno, V.D. Sychyov, V.V. |
| 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. |
| collection | DSpace DC |
| container_title | Semiconductor Physics Quantum Electronics & Optoelectronics |
| 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.
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| first_indexed | 2025-12-01T04:05:33Z |
| format | Article |
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| id | nasplib_isofts_kiev_ua-123456789-121239 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1560-8034 |
| language | English |
| last_indexed | 2025-12-01T04:05:33Z |
| publishDate | 2002 |
| publisher | Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| record_format | dspace |
| spelling | Kashirina, N.I. Lakhno, V.D. Sychyov, V.V. 2017-06-13T17:27:50Z 2017-06-13T17:27:50Z 2002 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 https://nasplib.isofts.kiev.ua/handle/123456789/121239 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. The work was supported bу Russian Foundation for Basic Research. Project code 01-07-90317. en Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України Semiconductor Physics Quantum Electronics & Optoelectronics Investigation of electron correlation effect on energy spectrum of two-electron systems in crystals with strong electron-phonon coupling Article published earlier |
| spellingShingle | 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. |
| title | 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_short | 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 |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/121239 |
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