2006
DOI: 10.1103/physrevb.74.180401
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Role of anisotropy in the spin-dimer compoundBaCuSi2O6

Abstract: 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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Cited by 37 publications
(28 citation statements)
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“…However, there are also anisotropic contributions that arise from the spin-orbit interaction that transfers the lattice anisotropy into the spin variables. The most general exchange interaction between two moments has the form Moriya, 1960;Sebastian, Tanedo et al, 2006), where…”
Section: B Uniaxial Symmetry Breaking and Superfluid Currentsmentioning
confidence: 99%
“…However, there are also anisotropic contributions that arise from the spin-orbit interaction that transfers the lattice anisotropy into the spin variables. The most general exchange interaction between two moments has the form Moriya, 1960;Sebastian, Tanedo et al, 2006), where…”
Section: B Uniaxial Symmetry Breaking and Superfluid Currentsmentioning
confidence: 99%
“…At higher temperatures, the concentration of triplets is increased, the probability of hopping along the ladder legs becomes smaller and the pairs of low-temperature ESR resonances merge to single lines, modes C and D (slow-exchange regime). The crossover from the fast-to slow-exchange limit was observed in a number of quantum magnets with spinsinglet ground state, for instance, in TlCuCl 3 35 and in BaCuSi 2 O 6 36, 37 . More details about the exchange narrowing phenomenon in magnetic resonance can be found in Ref.…”
mentioning
confidence: 89%
“…The pure BaCuSi 2 O 6 crystals were grown in a platinum crucible with KBO 2 flux and a molar ratio of 1 : 2 (flux : powder) at 950°C, where similar to [14], the crystallization starts as a consequence of an oversaturation caused by evaporation and some crawling due to a wetting of the crucible.…”
Section: Methodsmentioning
confidence: 99%