Mixed Heisenberg Chains. I. The Ground State Problem

Details Mixed Heisenberg Chains. I. The Ground State Problem Mixed Heisenberg Chains. I. The Ground State Problem

1997-03-24

arxiv.org/abs/cond-mat/9703206v2

J. Phys.: Condens. Matter 9 No 42, p. 9031-9042 (1997)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, RevTeX, 4 embedded eps figures, final version

Scientific paper

10.1088/0953-8984/9/42/017

We consider a mechanism for competing interactions in alternating Heisenberg
spin chains due to the formation of local spin-singlet pairs. The competition
of spin-1 and spin-0 states reveals hidden Ising symmetry of such alternating
chains.

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