Quantum criticality in the coupled two-leg spin ladder Ba2CuTeO6
arXiv:1705.06035 · doi:10.1103/PhysRevB.95.184430
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.
Accepted for publication in Phys. Rev. B
References in corpus (9)
- Fermi-liquid instabilities at magnetic quantum phase transitions
- Quantum Criticality in Heavy Fermion Metals
- Quantum magnetism and criticality
- Controlling Luttinger liquid physics in spin ladders under a magnetic field
- Quantum and classical criticality in a dimerized quantum antiferromagnet
- Quantum state transmission via a spin ladder as a robust data bus
- Dynamic Scaling in the Susceptibility of the Spin-1\2 Kagome Lattice Antiferromagnet Herbertsmithite
- Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
- Field-induced Tomonaga-Luttinger liquid phase of a two-leg spin-1/2 ladder with strong leg interactions