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cond-mat.str-el2002★ 88 cited
Phase Diagram of a Spin Ladder with Cyclic Four Spin Exchange
A. Laeuchli, G. Schmid, M. Troyer
We present the phase diagram of the Heisenberg model on the two leg ladder with cyclic four spin exchange, determined by a combination of Exact Diagonalization and Density…
cond-mat.str-el2002
The transition between hole-pairs and four-hole clusters in four-leg tJ ladders
Thomas Siller, Matthias Troyer, T. M. Rice +1
Holes weakly doped into a four-leg \tj ladder bind in pairs. At dopings exceeding a critical doping of four hole clusters are observed to form in DMRG calculation…