Quantum criticality in the coupled two-leg spin ladder Ba2CuTeO6

A. Glamazda, Y. S. Choi, S. H. Do, S. Lee, P. Lemmens, A. N. Ponomaryov, S. A. Zvyagin, J. Wosnitza, Dita Puspita Sari, I. Watanabe, K. Y. Choi

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Abstract

We report on zero-field muon spin rotation, electron-spin resonance, and polarized Raman scattering measurements of the coupled quantum spin ladder Ba2CuTeO6. Zero-field muon spin rotation and electron-spin resonance probes disclose a successive crossover from a paramagnetic through a spin-liquid-like into a magnetically ordered state with decreasing temperature. More significantly, the two-magnon Raman response obeys a T-linear scaling relation in its peak energy, linewidth, and intensity. This critical scaling behavior presents an experimental signature of proximity to a quantum-critical point from an ordered side in Ba2CuTeO6.

Original languageEnglish
Article number184430
JournalPhysical Review B
Volume95
Issue number18
DOIs
Publication statusPublished - 2017 May 30
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Glamazda, A., Choi, Y. S., Do, S. H., Lee, S., Lemmens, P., Ponomaryov, A. N., Zvyagin, S. A., Wosnitza, J., Sari, D. P., Watanabe, I., & Choi, K. Y. (2017). Quantum criticality in the coupled two-leg spin ladder Ba2CuTeO6. Physical Review B, 95(18), [184430]. https://doi.org/10.1103/PhysRevB.95.184430