Giant magnetic-field dependence of the coupling between spin Tomonaga-Luttinger liquids in BaCo2V2O8

Abstract

We use nuclear magnetic resonance to map the complete low-temperature phase diagram of the antiferromagnetic Ising-like spin-chain system BaCo2V2O8 as a function of the magnetic field applied along the chains. In contrast to the predicted crossover from the longitudinal incommensurate phase to the transverse antiferromagnetic phase, we find a sequence of three magnetically ordered phases between the critical fields 3.8 T and 22.8 T. Their origin is traced to the giant magnetic-field dependence of the total effective coupling between spin chains, extracted to vary by a factor of 24. We explain this novel phenomenon as emerging from the combination of nontrivially coupled spin chains and incommensurate spin fluctuations in the chains treated as Tomonaga-Luttinger liquids.

6 pages, 3 figures

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• Tomonaga-Luttinger liquid spin dynamics in the quasi-one dimensional Ising-like antiferromagnet BaCo${}_2$V${}_2$O${}_8$
• Nuclear Magnetic Resonance in High Magnetic Field: Application to Condensed Matter Physics
• Temperature dependence of the NMR relaxation rate 1/T_1 for quantum spin chains
• Dynamical response and dimensional crossover for spatially anisotropic antiferromagnets
• Phase diagram and quantum criticality of Heisenberg spin chains with Ising-like interchain couplings -- Implication to YbAlO${}_3$
• Magnetic phase diagram of the quantum spin chain compound SrCo${}_2$V${}_2$O${}_8$: a single-crystal neutron diffraction study in magnetic field
• Direct determination of the Tomonaga-Luttinger parameter $K$ in quasi-one-dimensional spin systems
• Dimensional modulation of spontaneous magnetic order in quasi-two-dimensional quantum antiferromagnets
• Platforms for the realization and characterization of Tomonaga-Luttinger liquids
• Phase transitions and spin dynamics of the quasi-one dimensional Ising-like antiferromagnet BaCo${}_2$V${}_2$O${}_8$ in a longitudinal magnetic field
• Field-induced antiferromagnetism and Tomonaga-Luttinger liquid behavior in the quasi-one-dimensional Ising-Antiferromagnet SrCo2V2O8
• Universality of Heisenberg-Ising chain in external fields
• Zigzag materials: selective interchain couplings control the coexistence of one-dimensional physics and deviations from it
• Confinement of many-body Bethe strings
• Repulsively bound magnon excitations of a spin-1/2 XXZ chain in a staggered transverse field
• A single-crystal neutron diffraction study on magnetic structure of the quasi-one-dimensional antiferromagnet SrCo2V2O8
• 1/5 and 1/3 magnetization plateaux in the spin 1/2 chain system YbAlO3
• Ising spin-1/2 XXZ chain's quantum problems beyond the spinon paradigm
• Haldane phase, field-induced magnetic ordering and Tomonaga-Luttinger liquid behavior in a spin-one chain compound NiC${}_2$O${}_4$$\cdot$2NH${}_3$