Hubbard chains network on corner-sharing tetrahedra: Origin of the heavy-fermion state in LiV2O4

Article

关键词: TRANSITION-METAL OXIDE;    ELECTRONIC-STRUCTURE;    MAGNETIC-SUSCEPTIBILITY;    SPIN FLUCTUATIONS;    MODEL;    LIQUID;    TEMPERATURE;    BEHAVIOR;    DIMENSIONS;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.65.155108

来源: SCIE

【 摘 要 】

We investigate the Hubbard chains network model defined on corner-sharing tetrahedra (the pyrochlore lattice) which is a possible microscopic model for the heavy-fermion state of LiV2O4. Based upon this model, we can explain transport, magnetic, and thermodynamic properties of LiV2O4. We calculate the spin susceptibility, and the specific-heat coefficient, exploiting the Bethe ansatz exact solution of the one-dimensional Hubbard model and Bosonization method. The results are quite consistent with experimental observations. We obtain the large specific-heat coefficient gammasimilar to222 mJ/mol K-2.

【 授权许可】

Free