Correlations in Quantum Spin Ladders with Site and Bond Dilution

  title={Correlations in Quantum Spin Ladders with Site and Bond Dilution},
  author={Kien Trinh and Stephan Haas and R Yu and Tommaso Roscilde},
  journal={Physical Review B},
Laboratoire de Physique, Ecole Normale Superieure de Lyon, 46 Allee d’Italie, 69003 Lyon, France(Dated: May 3, 2011)We investigate the e ects of quenched disorder, in the form of site and bond dilution, on thephysics of the S = 1=2 antiferromagnetic Heisenberg model on even-leg ladders. Site dilutionis found to prune rung singlets and thus create localized moments which interact via a random,unfrustrated network of e ective couplings, realizing a random-exchange Heisenberg model (REHM)in one… Expand
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* Electronic address: ktrinh@usc
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