Mixed Heisenberg Chains. I. The Ground State Problem
Niggemann, H. · Uimin, G. · Zittartz, J.
Original · EN
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.
English translation
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