Tomonaga-Luttinger liquid spin dynamics in the quasi-one dimensional Ising-like antiferromagnet BaCo${}_2$V${}_2$O${}_8$

Abstract

Combining inelastic neutron scattering and numerical simulations, we study the quasi-one dimensional Ising anisotropic quantum antiferromagnet \bacovo\ in a longitudinal magnetic field. This material shows a quantum phase transition from a Néel ordered phase at zero field to a longitudinal incommensurate spin density wave at a critical magnetic field of 3.8 T. Concomitantly the excitation gap almost closes and a fundamental reconfiguration of the spin dynamics occurs. These experimental results are well described by the universal Tomonaga-Luttinger liquid theory developed for interacting spinless fermions in one dimension. We especially observe the rise of mainly longitudinal excitations, a hallmark of the unconventional low-field regime in Ising-like quantum antiferromagnet chains.

6 pages, 4 figures; 4 additional pages of supplementary information containing 3 figures

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• Bose-Einstein Condensation in Magnetic Insulators
• Pinning quantum phase transition for a Luttinger liquid of strongly interacting bosons
• Controlling Luttinger liquid physics in spin ladders under a magnetic field
• Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
• Novel ordering of an S = 1/2 quasi one-dimensional Ising-like anitiferromagnet in magnetic field
• Dynamically dominant excitations of string solutions in the spin-1/2 antiferromagnetic Heisenberg chain in magnetic fields
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• Finite-temperature correlations in a quantum spin chain near saturation

Cited by in corpus (11)

• Characterizing quantum criticality and steered coherence in the XY-Gamma chain
• Emergence of spinons in layered trimer iridate Ba4Ir3O10
• Experimental observation of repulsively bound magnons
• 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
• Charging a Dimerized Quantum XY Chain
• Repulsively bound magnon excitations of a spin-1/2 XXZ chain in a staggered transverse field
• Magnetic properties of the quasi-one-dimensional S = 1 spin chain antiferromagnet BaNiTe2O7
• Stability Frontiers and Mixed-dimensional physics in the Kagome Intermetallics Ln3ScBi5 (Ln = La-Nd, Sm)
• A magnetic excitation linking quasi-1D Chevrel-type selenide and arsenide superconductors
• Evaluating Sample-Based Krylov Quantum Diagonalization for Heisenberg Models with Applications to Materials Science