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cond-mat.dis-nn1997
Random Mass Dirac Fermions in Doped Spin-Peierls and Spin-Ladder systems: One-Particle Properties and Boundary Effects
M. Steiner, M. Fabrizio, Alexander O. Gogolin
Quasi-one-dimensional spin-Peierls and spin-ladder systems are characterized by a gap in the spin-excitation spectrum, which can be modeled at low energies by that of Dirac fermion…
cond-mat1997
Enhanced magnetic fluctuations in doped spin-Peierls systems: a single-chain model analysis
M. Fabrizio, R. Mélin
We analyze by means of real space Renormalization Group (RG) as well as by exact diagonalizations the properties of a single-chain model of a doped spin-Peierls system, where a maj…
cond-mat.str-el1997
Coexistence of antiferromagnetism and dimerization in a disordered spin-Peierls model: exact results
M. Fabrizio, R. Mélin
A model of disordered spin-Peierls system is considered, where domain walls are randomly distributed as a telegraph noise. For this realization of the disorder in an XX spin chain,…