中文摘要：

The ferrimagnetism and quantum phase transition of a bipartite lozenge periodic Anderson-like organic polymer,in which the localized f electrons hybridize with the odd site conduction orbitals,are investigated by means of Green’s function theory.The ground state turns out to be gapless ferrimagnetism.At a finite temperature,the ferrimagnetic-toparamagnetic phase transition takes place.The Kondo screenings and Ruderman–Kittel–Kasuya–Yosida(RKKY)interaction can reduce and increase the transition temperature,respectively.Two Kondo screenings compete with each other,giving rise to the localized f electron spin screened antiferromagnetically.Accordingly,in a magnetic field,all spins are aligned along the chain easily,which is associated with metal–insulator transition.Furthermore,in a temperature-field plane,we reveal the gapless and spin polarized phases,which are characterized by susceptibility and specific heat,and whose behaviours are determined by the competition between the up-spin and down-spin hole excitations.

英文摘要：

The ferrimagnetism and quantum phase transition of a bipartite lozenge periodic Anderson-like organic polymer, in which the localized f electrons hybridize with the odd site conduction orbitals, are investigated by means of Green＇s function theory. The ground state turns out to be gapless ferrimagnetism. At a finite temperature, the ferrimagnetic-to- paramagnetic phase transition takes place. The Kondo screenings and Ruderman-Kittel-Kasuya-Yosida （RKKY） inter- action can reduce and increase the transition temperature, respectively. Two Kondo screenings compete with each other, giving rise to the localized f electron spin screened antiferromagnetically. Accordingly, in a magnetic field, all spins are aligned along the chain easily, which is associated with metal-insulator transition. Furthermore, in a temperature-field plane, we reveal the gapless and spin polarized phases, which are characterized by susceptibility and specific heat, and whose behaviours are determined by the competition between the up-spin and down-spin hole excitations.