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NMR Response in quasi one-dimensional Spin-1/2 Antiferromagnets
J. Sirker, N. Laflorencie
Non-magnetic impurities break a quantum spin chain into finite segments and induce Friedel-like oscillations in the local susceptibility near the edges. The signature of these osci…
Doping a Mott insulator with orbital degrees of freedom
J. Sirker, J. Damerau, A. Klümper
We study the effects of hole doping on one-dimensional Mott insulators with orbital degrees of freedom. We describe the system in terms of a generalized t-J model. At a specific po…
Thermally activated Peierls dimerization in ferromagnetic spin chains
J. Sirker, A. Herzog, A. M. Oles +1
We demonstrate that a Peierls dimerization can occur in ferromagnetic spin chains activated by thermal fluctuations. The dimer order parameter and entanglement measures are studied…
Thermodynamics of impurities in the anisotropic Heisenberg spin-1/2 chain
J. Sirker, S. Fujimoto, N. Laflorencie +2
The thermodynamics of finite open antiferromagnetic XXZ chains is studied using field theory, Bethe Ansatz and quantum Monte Carlo methods. For the susceptibility a parameter-free…