Topic
Bipolaron
About: Bipolaron is a research topic. Over the lifetime, 1335 publications have been published within this topic receiving 29154 citations. The topic is also known as: bipolarons.
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TL;DR: In this article, changes in geometry and charge distribution of polyaniline upon doping are studied using the Modified Neglect of Differential Overlap (MNDO) method using three different defect states, namely the polaron, the bipolaron and the single protonated unit cell of polyemeraldine base.
8 citations
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TL;DR: The electrochemical and electronic properties, as well as the redox induced ion and charge transport mechanism in poly[1,4-bis(pyrrol-2-yl)phenylene] (PBPyP) have been studied by electrochemical, optical and electron spin resonance (ESR) spectroscopies, along with electrogravimetric techniques.
8 citations
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TL;DR: In this paper, reflectivity measurements of Ti 4 O 7 in the energy range between 1 meV and 12 eV and with temperature dependence are presented and discussed within a bipolaron model.
Abstract: Our reflectivity measurements of Ti 4 O 7 in the energy range between 1 meV and 12 eV and with temperature dependence are presented and discussed within a bipolaron model. The analogies with magnetite (Fe 3 O 4 ) are finally considered.
8 citations
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TL;DR: In this article, the dynamic formation of trion by recombination of an on-chain bipolaron with an off-chain counterion trapped in a radical molecule, under the influence of an external electric field, has been investigated using a nonadiabatic evolution method.
8 citations
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TL;DR: In this article, the unscreened Frohlich electron-phonon interaction (EPI) is identified as the most essential for pairing in cuprate superconductors as now confirmed by isotope substitution, recent angle-resolved photoemission (ARPES), and some other experiments.
Abstract: We have identified the unscreened Frohlich electron–phonon interaction (EPI) as the most essential for pairing in cuprate superconductors as now confirmed by isotope substitution, recent angle-resolved photoemission (ARPES), and some other experiments. Low-energy physics is that of mobile lattice polarons and bipolarons in the strong EPI regime. Many experimental observations have been predicted or explained in the framework of our “Coulomb–Frohlich” model, which fully takes into account the long-range Coulomb repulsion and the Frohlich EPI. They include pseudo-gaps, unusual isotope effects and upper critical fields, the normal state Nernst effect, diamagnetism, the Hall–Lorenz numbers, and a giant proximity effect (GPE). These experiments along with the parameter-free estimates of the Fermi energy and the critical temperature support a genuine Bose–Einstein condensation of real-space lattice bipolarons in the pseudogap phase of cuprates. On the contrary, the phase fluctuation (or vortex) scenario is incompatible with the insulating-like in-plane resistivity and the magnetic-field dependence of orbital magnetization in the resistive state of underdoped cuprates.
7 citations