Arita Ryotaro, Suwa Yuji, Kuroki Kazuhiko, Aoki Hideo
Department of Physics, University of Tokyo, Hongo, Tokyo 113-0033, Japan.
Phys Rev Lett. 2002 Mar 25;88(12):127202. doi: 10.1103/PhysRevLett.88.127202. Epub 2002 Mar 7.
We propose that a chain of five-membered rings (polyaminotriazole) should be ferromagnetic with an appropriate doping that is envisaged to be feasible with a field-effect transistor structure. The ferromagnetism is confirmed by a spin density functional calculation, which also shows that ferromagnetism survives the Peierls instability. We explain the magnetism in terms of the Mielke and Tasaki flatband ferromagnetism with the Hubbard model. This opens a new possibility of band ferromagnetism in purely organic polymers.
我们提出，五元环链（聚氨基三唑）在进行适当掺杂时应具有铁磁性，预计在场效应晶体管结构中这种掺杂是可行的。自旋密度泛函计算证实了这种铁磁性，该计算还表明铁磁性在佩尔斯不稳定性下依然存在。我们用哈伯德模型，依据米尔克和田崎的平带铁磁性来解释这种磁性。这为纯有机聚合物中的能带铁磁性开辟了新的可能性。
