Open AccessFERMION-SPIN APPROACH TO STUDY A DOPED ANTIFERROMAGNET
Author(s) -
Xin Xu,
Yaru Song,
Shiping Feng
Publication year - 1996
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.45.1390
Subject(s) - physics , ground state , antiferromagnetism , fermion , kinetic energy , mean field theory , t j model , spin (aerodynamics) , projection (relational algebra) , field (mathematics) , condensed matter physics , quantum mechanics , hubbard model , computer science , superconductivity , mathematics , thermodynamics , algorithm , pure mathematics
Within the mean-field approximation, we discuss effects of the projection operator in the fermion-spin theory. The ground-state kinetic energy of the t-J model is studied, and the results show that the mean-field ground-state kinetic energy is consistent with the numerical results. The possible phase separation is also discussed.