Ruegg, C;
McMorrow, DF;
Normand, B;
Ronnow, HM;
Sebastian, SE;
Fisher, IR;
Batista, CD;
... Stahn, J; + view all
(2007)
Multiple magnon modes and consequences for the Bose-Einstein condensed phase in BaCuSi2O6.
PHYS REV LETT
, 98
(1)
, Article 017202. 10.1103/PhysRevLett.98.017202.
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Abstract
The compound BaCuSi2O6 is a quantum magnet with antiferromagnetic dimers of S=1/2 moments on a quasi-2D square lattice. We have investigated its spin dynamics by inelastic neutron scattering experiments on single crystals with an energy resolution considerably higher than in an earlier study. We observe multiple magnon modes, indicating clearly the presence of magnetically inequivalent dimer sites. The more complex spin Hamiltonian revealed in our study leads to a distinct form of magnon Bose-Einstein condensate phase with a spatially modulated condensate amplitude.
| Type: | Article |
|---|---|
| Title: | Multiple magnon modes and consequences for the Bose-Einstein condensed phase in BaCuSi2O6 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.98.017202 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.98.017202 |
| Language: | English |
| Additional information: | © 2007 The American Physical Society |
| Keywords: | MAGNETIZATION PLATEAUS, GROUND-STATE, SPIN, SRCU2(BO3)(2), TEMPERATURE, TLCUCL3, FIELD, GAP |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/134602 |
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