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, a supercell representation of localized defects is used to calculate the energy levels and the wavefunctions of localized band-gap states, which is based on the completely theoretical Valence Effective Hamiltonian, VEH, which has non-natural symmetries of the commonly used SSH Hamiltonian.
8 citations
TL;DR: In this article, a model for the transport is proposed, which is based on assuming the existence of a bipolaron ground state and hopping transport of thermally activated polarons, and the resulting conductivity mechanism is an admixture of thermal activation and variable range hopping.
8 citations
TL;DR: In this paper, the effect of various filling levels (FLs) of mixtures of two transition compounds (X)AgNO3 (10−X) FeCl3, on structural, electrical and magnetic properties of polystyrene (PS) films was investigated.
8 citations
TL;DR: In this article, the spin injection into organic polymers from both an electrocircuit model and diffusion theory separately was studied, and it was found that a high current polarization could be obtained by adjusting the proportion of the polarons over the carriers.
8 citations
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TL;DR: In this paper, a weakly-interacting one-dimensional Bose gas with two impurities coupled locally to the boson density was studied and the quantum contribution to the induced interaction was analyzed.
Abstract: We study a weakly-interacting one-dimensional Bose gas with two impurities coupled locally to the boson density. We derive analytical results for the induced interaction between the impurities at arbitrary coupling and separation $r$. At $r\lesssim \xi$, where $\xi$ denotes the healing length of the Bose gas, the interaction is well described by the mean-field contribution. Its form changes as the coupling is increased, approaching a linear function of $r$ at short distances in the regime of strong coupling. The mean-field contribution decays exponentially at arbitrary coupling for $r\gg\xi$. At such long distances, however, the effect of quantum fluctuations becomes important, giving rise to a long-ranged quantum contribution to the induced interaction. At longest distances it behaves as $1/r^3$, while at strong coupling we find an intermediate distance regime with a slower decay, $1/r$. The quantum contribution in the crossover regime is also calculated. The induced interaction between impurities (i.e., polarons) is attractive and leads to the formation of their bound state, known as bipolaron. We discuss its binding energy.
8 citations