期刊
PHYSICAL REVIEW B
卷 74, 期 18, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.74.180401
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资金
- Direct For Mathematical & Physical Scien [844115] Funding Source: National Science Foundation
- Division Of Materials Research [844115] Funding Source: National Science Foundation
We present results of magnetization and electron paramagnetic resonance experiments on the spin-dimer system BaCuSi2O6. Evidence indicates that the origin of anisotropic terms in the spin Hamiltonian lies in 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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