The charge density wave and spin density wave in interchain coupled alternate pi-conjugated organic ferromagnets

摘要

Based on a theoretical model proposed for interchain coupled quasi-one-dimensional organic ferromagnets, the distribution of the charge density and spin density are studied. The next-nearest-neighbouring hopping interaction, the strong electron-phonon coupling and electron-electron interaction are taken into account. It is found that with increasing of the next-nearest-neighbouring hopping interaction, two kinds of CDW along the main chain appear sequentially. The first CDW is accompanied by perfect dimerization. The second CDW has a period of four lattice sites. The SDW is modulated by the CDW. The interchain coupling causes the transfers of charge density and spin density between the main chain and side radicals, and reduces the critical next-nearest-neighbouring hopping at which the second CDW appears. [References: 19]