Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Dielectric instabilities and phase transitions in pseudospin-electron model of HTSC system
Репозиторій DSpace/Manakin
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Dielectric instabilities and phase transitions in pseudospin-electron model of HTSC system
Тема:
Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты"
Посилання:
Dielectric instabilities and phase transitions in pseudospin-electron model of HTSC system / I.V. Stasyuk, A.M. Shvaika // Физика низких температур. — 1996. — Т. 22, № 5. — С. 535-538. — Бібліогр.: 14 назв. — англ.
Підтримка:
The research described in this publication was made possible in part by Grant No K6A100 from the Joint Fund of the Government of Ukraine and International Science Foundation.
Дата:
1996
Переглядів:
317
Завантажень:
123
Анотація:
The possible dielectric instabilities and phase transitions in high-Tc superconductors are analyzed within the pseudospin-electron model involving Hubbard type electron correlations as well as their interaction with local an-harmonic vibrational modes. The calculation of the dynamic dielectric susceptibility χ(ω, q) is performed in the generalized random phase approximation. The instabilities with respect to the polarization and/or charge fluctuations are obtained from the temperature dependences of χ(ω, q). The behavior of low-frequency modes in the vicinity of these instabilities is investigated. The case of the infinity narrow electron band is considered in details.
