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Theory of the field-induced BEC in the frustrated spin-1/2 dimer compound BaCuSi2O6
Nicolas Laflorencie, Frederic Mila
Building on recent neutron and NMR experiments, we investigate the field-induced exotic criticality observed in the frustrated spin-1/2 dimer compound BaCuSi2O6 using a frustrated…
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…
Mechanisms for Spin-Supersolidity in S=1/2 Spin-Dimer Antiferromagnets
J. -D. Picon, A. F. Albuquerque, K. P. Schmidt +3
Using perturbative expansions and the contractor renormalization (CORE) algorithm, we obtain effective hard-core bosonic Hamiltonians describing the low-energy physics of s…
Kondo screening cloud and the charge staircase in one-dimensional mesoscopic devices
Rodrigo G. Pereira, Nicolas Laflorencie, Ian Affleck +1
We propose that the finite size of the Kondo screening cloud, xi_K, can be probed by measuring the charge quantization in a one-dimensional system coupled to a small quantum dot. W…
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…