Effect of inter-site electron-electron interaction on the spin and charge density in interchain coupled organic ferromagnets
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
2 CCAST (World Laboratory) - P.O. Box 8730, Beijing 100080, China
3 Physics Department, The Chinese University of HongKong - Shatin N. T., HongKong
Accepted: 17 April 1997
A theoretical model is given to deal with two neighboring organic ferromagnetic chains including the inter-site electron-electron interaction. The results show that when the inter-site e-e interaction is greater than a critical value, which varies with the interchain coupling, there exists charge density wave(CDW) along the main chain. When the interchain coupling increases to a critical value, the CDW disappears and the spin density redistributes. The interchain coupling stabilizes the ferromagnetic state while the inter-site e-e interaction makes it unstable.
PACS: 71.45.Lr – Charge-density-wave systems / 75.10.Lp – Band and itinerant models / 75.30.Fv – Spin-density waves
© EDP Sciences, 1997