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The t-J model was first derived in 1977 from the Hubbard model by Józef Spałek. The model describes strongly correlated electron systems. It is used to calculate high temperature superconductivity states in doped antiferromagnets. The t-J Hamiltonian is: where * - sum over nearest-neighbor sites i and j, * - fermionic creation and annihilation operators, * - spin polarization, * - hopping integral * - coupling constant , * - coulomb repulsion, * - particle number at the site i, and * - spins on the sites i and j. ==References== * Lectures on Correlation and Magnetism, (Fazekas ),(no. :199 ) * t-J model then and now: A personal perspective from the pioneering times, Józef Spałek, (arXiv:0706.4236 ) 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「T-J model」の詳細全文を読む スポンサード リンク
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