Nuclear magnetic resonance evidence for a strong modulation of the Bose-Einstein condensate in BaCuSi2O6

Krämer, S.; Stern, R.; Horvatić, M.; Berthier, C.; Kimura, T.; Fisher, R. (2007). Nuclear magnetic resonance evidence for a strong modulation of the Bose-Einstein condensate inBaCuSi2O6. Physical Review B, 76, 100406(R).10.1103/PhysRevB.76.100406.
ajakirjaartikkel
Krämer, S.; Stern, R.; Horvatić, M.; Berthier, C.; Kimura, T.; Fisher, R.
  • Inglise
Nuclear magnetic resonance evidence for a strong modulation of the Bose-Einstein condensate inBaCuSi2O6
Physical Review B
1098-0121
76
2007
100406(R)
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
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Viited terviktekstile

dx.doi.org/10.1103/PhysRevB.76.100406

Lisainfo

We present a Cu-63,Cu-65 and Si-29 NMR study of the quasi-2D coupled spin 1/2 dimer compound BaCuSi2O6 in the magnetic field range 13-26 T and at temperatures as low as 50 mK. NMR data in the gapped phase reveal that below 90 K different intradimer exchange couplings and different gaps (Delta(B)/Delta(A)=1.16) exist in every second plane along the c axis, in addition to a planar incommensurate (IC) modulation. Si-29 spectra in the field induced magnetic ordered phase reveal that close to the quantum critical point at H-c1=23.35 T the average boson densityn of the Bose-Einstein condensate is strongly modulated along the c axis with a density ratio for every second plane n(A)n(B)similar or equal to 5. An IC modulation of the local density is also present in each plane.
TLCUCL3; MAGNONS; PHASE; FIELD