| Exact ground states of extended t-J_{z} models on a square lattice (2005) | |||||||||
Abstract | |||||||||
| We examine special extended spin S=1/2 fermionic and hard core bosonic t-J_{z} models and find exact ground states. Some of these models display an exponentially large degeneracy with diagonal stripe like patterns.. Comment: 6 pages, 2 figures | |||||||||
Details der Publikation | |||||||||
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