Exact ground state for 1D electronic models

Details Exact ground state for 1D electronic models Exact ground state for 1D electronic models

1999-11-20

arxiv.org/abs/cond-mat/9911327v1

Phys.Rev. B61, 14592 (2000).

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 1 figure

Scientific paper

10.1103/PhysRevB.61.14592

We have found the exact ground state for two electronic models on a linear chain. The first model describes half-filling electron system in the ferromagnet--antiferromagnet transition point. In the singlet ground state the spin correlators show giant spiral magnetic ordering with the period of a spiral equals to the system size. The second electronic model describes the point where the ground state has giant spiral off-diagonal long-range order and, therefore, superconducting. We suggest the formation of the ground state with giant spiral order (ferromagnetic or off-diagonal) as a probable scenario of the subsequent destruction of the ferromagnetism and the superconductivity.

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