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, the authors performed density-functional theory calculations for Na or K adsorbates on GaAs(110) and found that the alkali-metal adatoms donate their valence electrons into Ga dangling bonds, resulting in a lattice relaxation around the occupied Ga orbital with a very strong polaron shift of about 1 eV.
4 citations
01 Jan 1995
4 citations
01 Jan 1995
4 citations
TL;DR: In this article, the ground state properties of polydiacetylene chains are investigated using a simple tight-binding model in which the various parameters are chosen so as to reproduce the experimental geometry and band gap.
Abstract: The ground state properties of polydiacetylene chains are investigated using a simple tight-binding model in which the various parameters are chosen so as to reproduce the experimental geometry and band gap. The model is then used to obtain the band structure and total energy of a simple, locally deformed state. This calculation indicates that, on the charged polydiacetylene chain, both polaron and bipolaron states have lower energy than the corresponding conduction band electron states and implies that the lowest-energy conduction states are localised.
4 citations
TL;DR: In this paper, the activation energy for electrical charge transport through polythiophene thin film was investigated under high hole density through electrolyte-gating and compared with previous results attained from the same polymer film but with low induced carrier densities.
Abstract: We investigate the activation energy for electrical charge transport through a polythiophene thin film. The results are particularly obtained under high hole density (5.9 × 1020 holes/cm3) through electrolyte-gating and are compared with previous results attained from the same polymer film but with low induced carrier densities. Comparative analyses show that introducing high hole densities into the polymer results in (i) suppression of the transport activation energy and (ii) reduction of the temperature that yields transition in the activation energy. These results are explained based on the formation of bipolaron states, which are generated at such high hole densities.
4 citations