Ferromagnetism without flat bands in thin armchair nanoribbons
英文摘要：
Describing by a Hubbard type of model a thin armchair graphene ribbon in the armchair hexagon chain limit, one shows in exact terms, that even if the system does not have flat bands at all, at low concentration a mesoscopic sample can have ferromagnetic ground state, being metallic in the same time. The mechanism is connected to a common effect of correlations and confinement.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
