Journal ArticleDOI
A variational calculation of the stability of the two centre Fröhlich bipolaron
TLDR
In this paper, it was shown that a two-center Frohlich bipolaron can exist if the ration of the optic and static dielectric constant satisfies a simple realistic inequality.About:
This article is published in Physics Letters A.The article was published on 1994-11-21. It has received 8 citations till now. The article focuses on the topics: Bipolaron & Variational method.read more
Citations
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Journal ArticleDOI
Stability of bipolarons, electron-electron correlations, the variational principle, and the virial theorem
TL;DR: For bipolaron states, a relation between the variational principle and the virial theorem optimizing the electronic wave functions is established in this paper, where it is shown that a bipolaron one-center state is unstable under any conditions that do not violate basic physical principles.
Journal ArticleDOI
The regular perturbation theory on the stability of the strong-coupling bipolaron
TL;DR: In this article, the ground-state energy of a bipolaron is calculated by the variational method as a function of the Frohlich coupling constants alpha and eta, the ratio of the optic to the static dielectric constant.
Journal ArticleDOI
Crossover from large to small bipolarons
TL;DR: In this article, a variational procedure is developed to study the properties of the bipolaron in the Frohlich model including explicitly the electron band structure and taking into account the long-range repulsive electron-electron interaction.
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Landau-pekar bipolaron in singlet and triplet states
TL;DR: In this article, a relation is established between the variational principle and the virial theorem optimizing the electronic wave functions, and it is established that a step-by-step increase in the flexibility of the wave function due to the electron correlations does not stabilize a one-center bipolaron.
Journal ArticleDOI
About the Problem of Existence of a Three-Dimensional Bipolaron
TL;DR: The range of existence of a translation invariant continuum three-dimensional bipolaron in space of two variables: of electron-phonon coupling constant and the dielectric parameters of polar medium is investigated in this article.
References
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Journal ArticleDOI
Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure
Maw-Kuen Wu,J. R. Ashburn,C. J. Torng,Pei-Herng Hor,R. L. Meng,Li Gao,Z. J. Huang,Yongmei Wang,Ching-Wu Chu +8 more
TL;DR: A stable and reproducible superconductivity transition between 80 and 93 K has been unambiguously observed both resistively and magnetically in a new Y-Ba-Cu-O compound system at ambient pressure.
Journal ArticleDOI
Adiabatic Theory of an Electron in a Deformable Continuum
David Emin,T. Holstein +1 more
TL;DR: A scaling analysis of the adiabatic eigenstates of an electron placed in a deformable continuum with and without the presence of a Coulombic defect is presented in this paper.
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Theory of bipolarons and bipolaronic bands
A. S. Alexandrov,J. Ranninger +1 more
TL;DR: In this article, the authors examined the electronic excitation spectrum of a bipolaronic crystal and showed that in the low bipolaron density limit the spectrum is superfluidlike, so that bipolarons might be superconducting.
Journal ArticleDOI
Formation, motion, and high-temperature superconductivity of large bipolarons.
TL;DR: In this article, the formation of large bipolarons in multidimensional ionic solids has been studied and the formation as well as normal-state and superconducting properties of these bipolarons appear consistent with observations of the high-temperature superconductors.
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Formation of a large singlet bipolaron: Application to high-temperature bipolaronic superconductivity
David Emin,Mark Hillery +1 more
TL;DR: It is found that, in two- and three-dimensional electronic systems with only a short-range electron-lattice interaction, the only bipolarons are small bipolarons, and the notion that their charge carriers are singlet large bipolarons is a real possibility for high-temperature superconductors.