Role of anisotropy in the spin-dimer compound BaCuSi2O6

Details Role of anisotropy in the spin-dimer compound BaCuSi2O6 Role of anisotropy in the spin-dimer compound BaCuSi2O6

2006-06-09

arxiv.org/abs/cond-mat/0606244v3

Phys. Rev. B 74, 180401 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.74.180401

We present results of magnetisation and electron paramagnetic resonance experiments on the spin-dimer system BaCuSi2O6. Evidence indicates that the origin of anisotropic terms in the spin Hamiltonian is from magnetic dipolar interactions. Axial symmetry-breaking is on a very small energy scale of ~11 mK, confirming Bose Einstein condensation critical scaling over an extended temperature range in the vicinity of the quantum critical point.

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