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4 papers · 2 filters
Strongly disordered spin ladders
R. Mélin, Y. -C. Lin, P. Lajkó +2
The effect of quenched disorder on the low-energy properties of various antiferromagnetic spin ladder models is studied by a numerical strong disorder renormalization group method…
Exact renormalization of the random transverse-field Ising spin chain in the strongly ordered and strongly disordered Griffiths phases
Ferenc Iglói
The real-space renormalization group (RG) treatment of random transverse-field Ising spin chains by Fisher ({\it Phys. Rev. B{\bf 51}, 6411 (1995)}) has been extended into the stro…
Disorder induced cross-over effects at quantum critical points
Enrico Carlon, Péter Lajko, Ferenc Iglói
Critical properties of quantum spin chains with varying degrees of disorder are studied at zero temperature by analytical and extensive density matrix renormalization methods. Gene…
The Random-bond Potts model in the large-q limit
Robert Juhasz, Heiko Rieger, Ferenc Igloi
We study the critical behavior of the q-state Potts model with random ferromagnetic couplings. Working with the cluster representation the partition sum of the model in the large-q…