Nature of extrinsic and intrinsic self-trapping of charge carriers in underdoped cuprate high-Tc superconductors

Nature of extrinsic and intrinsic self-trapping (ST) of charge carriers in cuprates have been studied theoretically. The binding energies and radii of the extrinsic and intrinsic large polarons and bipolarons in cuprates are calculated variationally using the continuum model and adiabatic approxim...

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Published in:Condensed Matter Physics
Date:2016
Main Author: Ganiev, O.K.
Format: Article
Language:English
Published: Інститут фізики конденсованих систем НАН України 2016
Online Access:https://nasplib.isofts.kiev.ua/handle/123456789/156552
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Journal Title:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Cite this:Nature of extrinsic and intrinsic self-trapping of charge carriers in underdoped cuprate high-Tc superconductors / O.K. Ganiev // Condensed Matter Physics. — 2016. — Т. 19, № 4. — С. 43702: 1–10. — Бібліогр.: 41 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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Summary:Nature of extrinsic and intrinsic self-trapping (ST) of charge carriers in cuprates have been studied theoretically. The binding energies and radii of the extrinsic and intrinsic large polarons and bipolarons in cuprates are calculated variationally using the continuum model and adiabatic approximation. We have shown that the extrinsic and intrinsic three-dimensional (3D) large bipolarons exist in underdoped cuprates at η = ε∞/ε₀ < 0.127 and η < 0.138, respectively [where ε∞(ε₀) is the optic (static) dielectric constant]. Теоретично вивчено природу зовнiшнiх i внутрiшнiх самозахопних носiїв струму в купратах. Енергiї зв’язування i радiуси зовнiшнiх i внутрiшнiх великих поляронiв i бiполяронiв в купратах обчислено варiацiйно, використовуючи неперервну модель та адiабатичне наближення. Ми показали, що зовнiшнi i внутрiшнi тривимiрнi великi бiполярони iснують в слабозлегованих купратах, вiдповiдно, при η = ε∞/ε₀ < 0.127 i η < 0.138 [де ε∞(ε₀) — оптична (статична) дiелектрична стала].
ISSN:1607-324X