Functional Integrals and Excitation Energy in Three-Band Hubbard Model

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2008,（3）
• 页码范围: 567-570
• 页数: 4页
• 语种: 英文

摘要

The normal and anomalous Green's functions of antiferromagnetic state in three-band Hubbard model are studied by using functional integrals and temperature Green's function method. The equations of energy spectrum are derived. In addition, excitation energy of Fermi fields are calculated under long wave approximation.