Mechanism for disruption of antiferromagnetism in the two-band Hubbard model
Livdan D. O. , Strzhemechnyi M. A. , Tokar' O. I. , Fil' D. V.
In the two-band Hubbard model of a Cu-O plane of a high-7"c superconductor, a hole at oxygen induces an R VB polaron in the Cu subsystem. The reason is that a Cu-O Rice singlet cannot exist against the background of an antiferromagnetism of Cu spins; an R VB ordering of these spins is necessary.
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![](/ps/1143/article_17302_800_head.png "In the two-band Hubbard model of a Cu-O plane of a high-7"<sub>c</sub> superconductor, a hole at oxygen induces an <i>R VB </i>polaron in the Cu subsystem. The reason is that a Cu-O Rice singlet cannot exist against the background of an antiferromagnetism of Cu spins; an <i>R VB </i>ordering of these spins is necessary.")