Symmetry Properties on Magnetization in the Hubbard Model at Finite Temperatures

Дата и время публикации : 1998-03-10T07:27:59Z

Авторы публикации и институты :
Gang Su
Masuo Suzuki

Ссылка на журнал-издание: Phys. Rev. B57, 13367 (1998).
Коментарии к cтатье: Latex file, no figure
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el, cond-mat.stat-mech

Краткий обзор статьи: By making use of some symmetry properties of the relevant Hamiltonian, two fundamental relations between the ferromagnetic magnetization and a spin correlation function are derived for the $d (=1,2,3)$-dimensional Hubbard model at finite temperatures. These can be viewed as a kind of Ward-Takahashi identities. The properties of the magnetization as a function of the applied field are discussed. The results thus obtained hold true for both repulsive and attractive on-site Coulomb interactions, and for arbitrary electron fillings.

Category: Physics