Ground state and excitations of a four-component fermion model

Article

关键词: SPIN-ORBITAL MODEL;    ENERGY LEVELS;    ONE-DIMENSION;    SYSTEMS;    DEGENERACY;    CHAIN;   

DOI  :  10.1103/PhysRevB.70.233105

来源: SCIE

【 摘 要 】

The properties of the ground state and excitations of a four-component Hubbard-like model are studied by the Lieb-Schultz-Mattis approach. It is proven rigorously that the ground state of the model is nondegenerate and excitations are gapless at all band fillings.

【 授权许可】

Free