Magnetic-order crossover in coupled spin ladders

Minki Jeong, H. Mayaffre, C. Berthier, D. Schmidiger, A. Zheludev, M. Horvatić

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)
111 Downloads (Pure)


We report a novel crossover behavior in the long-range-ordered phase of a prototypical spin-1/2 Heisenberg antiferromagnetic ladder compound (C7H10N)2CuBr4. The staggered order was previously evidenced from a continuous and symmetric splitting of 14N NMR spectral lines on lowering the temperature below Tc ≃330mK, with a saturation towards ≃150 mK. Unexpectedly, the split lines begin to further separate away below T∼100mK, while the linewidth and the line shape remain completely invariable. This crossover behavior is further corroborated by the NMR relaxation rate T11 measurements. A very strong suppression reflecting the ordering, T11 ∼T5.5, observed above T, is replaced by T11 ∼T below T. These original NMR features are indicative of the unconventional nature of the crossover, which may arise from a unique arrangement of the ladders into a spatially anisotropic and frustrated coupling network.
Original languageEnglish
Article number167206
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 21 Apr 2017


  • quantum magnetism

ASJC Scopus subject areas

  • Condensed Matter Physics


Dive into the research topics of 'Magnetic-order crossover in coupled spin ladders'. Together they form a unique fingerprint.

Cite this