Ground states with cluster structures in a frustrated Heisenberg chain
نویسندگان
چکیده
منابع مشابه
Valence Bond Ground States in a Frustrated Two-Dimensional Spin-1/2 Heisenberg Antiferromagnet
We study a class of two-dimensional spin-1/2 Heisenberg antiferromagnets, introduced by Klein [1], in which the nearest-neighbor term is supplemented by next-nearest-neighbor pair and four-body interactions, producing additional frustration. For certain lattices, including e.g. the hexagonal lattice, we prove that any finite subset which admits a dimer covering has a ground state space spanned ...
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The ground state of a spin-1/2 Heisenberg chain with both frustration and long-range interactions is studied using Lanczos exact diagonalization. The evolution of the well-known dimerization transition of the system with short-range frustrated interactions (the J1-J2 chain) is investigated in the presence of additional unfrustrated interactions decaying with distance as 1/r(alpha). It is shown ...
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ژورنال
عنوان ژورنال: Journal of Physics: Condensed Matter
سال: 1996
ISSN: 0953-8984,1361-648X
DOI: 10.1088/0953-8984/8/35/009