Broken-symmetry solutions of the three-band extended Hubbard model

✍ Scribed by Shoji Yamamoto; Masa-aki Ozaki

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 161 KB
• Volume: 186-188
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(93)90739-s

✦ Synopsis

Broken-symmetry solutions of the three-band extended Hubbard model for CuO 2 planes of high-T c superconductors (HTSCs) are investigated. Based on group theoretical arguments, we derive and characterize all types of broken-symmetry phases with a definite symmetry which have an ordering vector q = Q0 -= (0, 0) and Q ~ Or, Iv). ~.~, a2. ~ and a3. ~ are the creation operators of the electron with spin ~ in an atomic Cu 3dx2_~2, O 2py orbital at unit cell n, respectively, and ni.~ = a*.,,.a., . The unit vectors e x and ey in real space are along the x and y directions. The parameters e ° and e~