Spin dynamics in the high-field phases of volborthite

Abstract

We report single-crystal 51V NMR studies on volborthite Cu3V2O7(OH)2 2H2O, which is regarded as a quasi-two-dimensional frustrated magnet with competing ferromagnetic and antiferromagnetic interactions. In the 1/3 magnetization plateau above 28 T, the nuclear spin-lattice relaxation rate 1/T1 indicates an excitation gap with a large effective g factor in the range of 4.6-5.9, pointing to magnon bound states. Below 26 T where the gap has closed, the NMR spectra indicate small internal fields with a Gaussian-like distribution, whereas 1/T1 shows a power-law-like temperature dependence in the paramagnetic state, which resembles a slowing down of spin fluctuations associated with magnetic order. We discuss the possibility of an exotic spin state caused by the condensation of magnon bound states below the magnetization plateau.

10 pages, 13 figures

References in corpus (15)

• Vector chiral and multipolar orders in the spin-1/2 frustrated ferromagnetic chain in magnetic field
• Ground State of the Kagome Lattice Heisenberg Antiferromagnet
• Emergent multipolar spin correlations in a fluctuating spiral - The frustrated ferromagnetic S=1/2 Heisenberg chain in a magnetic field
• Frustrated ferromagnetic spin-1/2 chain in a magnetic field: The phase diagram and thermodynamic properties
• Nuclear magnetic resonance signature of the spin-nematic phase in LiCuVO${}_4$ at high magnetic fields
• One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite
• Incomplete devil's staircase in the magnetization curve of SrCu2(BO3)2
• Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnet LiCuVO${}_4$
• Magnetic behavior of volborthite Cu3V2O7(OH)2(H2O)2 determined by coupled trimers rather than frustrated chains
• Spatially Anisotropic Heisenberg Kagome Antiferromagnet
• Quantum and Classical Spins on the Spatially Distorted Kagome Lattice: Applications to Volborthite
• Coupled frustrated quantum spin-1/2 chains with orbital order in volborthite Cu3V2O7(OH)2(H2O)2
• A Panoply of Orders from a Quantum Lifshitz Field Theory
• A novel crystal polymorph of volborthite, Cu3V2O7(OH)2 2H2O
• Ordered Phases of the Anisotropic Kagome Lattice Antiferromagnet in a Field

Cited by in corpus (19)

• Quantum Magnetism in Minerals
• Magnon crystallization in the kagome lattice antiferromagnet
• Where is the Quantum Spin Nematic?
• Observation of 4- and 6-magnon bound-states in the spin-anisotropic frustrated antiferromagnet FeI${}_2$
• Bose-Einstein condensation of a two-magnon bound state in a spin-one triangular lattice
• Note: Optical filter method for high-resolution magnetostriction measurement using fiber Bragg grating under millisecond-pulsed high magnetic fields at cryogenic temperatures
• Electron spin resonance for the detection of long-range spin nematic order
• Magnetoelastic couplings in the deformed Kagomé quantum spin lattice of volborthite
• Correlated spin liquids in the quantum kagome antiferromagnet at finite field: a renormalisation group analysis
• NMR evidence against a spin-nematic nature of the presaturation phase in the frustrated magnet SrZnVO(PO4)2
• Novel quantum phase of the chromium spinel oxide HgCr${}_2$O${}_4$ in high magnetic fields
• Spin nematics in frustrated spin-dimer systems with bilayer structure
• Possible Observation of Quadrupole Waves in Spin Nematics
• Effects of Dzyaloshinskii-Moriya interactions in volborthite: Magnetic orders and thermal Hall effect
• Low-energy spin excitations of the frustrated ferromagnetic $J_1$-$J_2$ chain material linarite, PbCuSO${}_4$(OH)${}_2$, in applied magnetic fields $\mathbf{H}\parallel b$ axis
• Magnetic excitations in the 1/3 plateau state in InCu${}_3$(OH)${}_6$Cl${}_3$
• Dynamics of quantum spin-nematics: Comparisons with canted antiferromagnets
• Magnetostriction studies up to megagauss fields using fiber Bragg grating technique
• Narrowly avoided spin-nematic phase in BaCdVO(PO${}_4$)${}_2$: NMR evidence