Density matrix renormalization group studies on one-dimensional -conjugated organic ferromagnet with side radicals |
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Authors: | KL Yao GY Sun WZ Wang |
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Institution: | (1) Department of Physics and the State key Lab. of Laser Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China, CN;(2) The International Center of Materials Physics, The Chinese Academy of Science, Shengyang, 110015, PR China, CN |
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Abstract: | By using the density matrix renormalization group (DMRG) and the self-consistent numerical method, we obtain a high spin ground
state with localized spin density describing spin localization and the soliton describing the distortion of the lattice configurations
along the main chain. Different electron-phonon interactions result in different configurations of solitons. When the electron-phonon
coupling along the main chain is larger than a critical value , a transition from a single soliton-like distortion to a pair of soliton-like distortions along the main chain takes place.
Such critical value depends mainly on the intersite Coulomb interactions. The spin density wave along the main chain is always localized around
the center of soliton-like distortions.
Received 2 July 2001 and Received in final form 25 September 2001 |
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Keywords: | PACS 75 40 Mg Numerical simulation studies – 75 30 Ds Spin waves |
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