66 citations · 273 across the 15 of their papers we have counts for
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cond-mat.str-el1998★ 26 cited
Phase Diagram of the 2-Leg Heisenberg Ladder with Alternating Dimerization
M. A. Martin-Delgado, J. Dukelsky, G. Sierra
Using the Lanczos method we determine the phase diagram of the 2-leg AF-Heisenberg ladder with alternating dimerization. It consists of a resonating valence bond phase and a dimer…
cond-mat1998★ 24 cited
Diagonal Ladders: A New Class of Models for Strongly Coupled Electron Systems
G. Sierra, M. A. Martin-Delgado, S. R. White +2
We introduce a class of models defined on ladders with a diagonal structure generated by plaquettes. The case corresponds to the necklace ladder and has remarkable pr…
cond-mat.str-el1998★ 29 cited
The Matrix Product Approach to Quantum Spin Ladders
J. M. Roman, G. Sierra, J. Dukelsky +1
We present a manifestly rotational invariant formulation of the matrix product method valid for spin chains and ladders. We apply it to 2 legged spin ladders with spins 1/2, 1 and…