Continuous spin excitations in the three-dimensional frustrated magnet K2Ni2(SO4)3

Abstract

Continuous spin excitations are widely recognized as one of the hallmarks of novel spin states in quantum magnets, such as quantum spin liquids (QSLs). Here, we report the observation of such kind of excitations in K2Ni2(SO4)3, which consists of two sets of intersected spin-1 Ni2+ trillium lattices. Our inelastic neutron scattering measurement on single crystals clearly shows a dominant excitation continuum, which exhibits a distinct temperature-dependent behavior from that of spin waves, and is rooted in strong quantum spin fluctuations. Further using the self-consistent-gaussian-approximation method, we determined the fourth- and fifth-nearest neighbor exchange interactions are dominant. These two bonds together form a unique three-dimensional network of corner-sharing tetrahedra, which we name as ''hyper-trillium'' lattice. Our results provide direct evidence for the existence of QSL features in K2Ni2(SO4)3 and highlight the potential for the hyper-trillium lattice to host frustrated quantum magnetism.

arXiv comment6 pages and 5 figures, plus several pages of supplemental material, comments are welcome

References in corpus (47)

• Quantum Spin Liquids
• Magnetic Pyrochlore Oxides
• Fractionalized excitations in the spin liquid state of a kagomé lattice antiferromagnet
• Proximate Kitaev Quantum Spin Liquid Behaviour in α-RuCl${}_3$
• Neutron tomography of magnetic Majorana fermions in a proximate quantum spin liquid
• Linear spin wave theory for single-Q incommensurate magnetic structures
• A Field Guide to Spin Liquids
• Scattering Continuum and Possible Fractionalized Excitations in $\alpha$-RuCl${}_3$
• Continuous excitations of the triangular-lattice quantum spin liquid YbMgGaO4
• Low-temperature crystal and magnetic structure of $\alpha$-RuCl3
• Evidence for a spinon Fermi surface in a triangular lattice quantum spin liquid candidate
• Evidence for a Field-induced Quantum Spin Liquid in $\alpha$-RuCl${}_3$
• Excitations in the field-induced quantum spin liquid state of alpha-RuCl3
• Quantum criticality and universal scaling of a quantum antiferromagnet
• Order by disorder and spiral spin liquid in frustrated diamond lattice antiferromagnets
• The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source - Design and Performance
• HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
• Phase Diagram of $\alpha$-RuCl${}_3$ in an in-plane Magnetic Field
• Experimental identification of quantum spin liquids
• Definitive Evidence for Order-by-Quantum-Disorder in Er2Ti2O7
• Experimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore
• Spin-glass ground state in a triangular-lattice compound YbZnGaO${}_4$
• Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce${}_2$Zr${}_2$O${}_7$
• Finite field regime for a quantum spin liquid in $\alpha$-RuCl${}_3$
• Magnon bound states vs. anyonic Majorana excitations in the Kitaev honeycomb magnet $\alpha$-RuCl${}_3$
• Antiferromagnetic resonance and terahertz continuum in $\alpha -$RuCl${}_3$
• Continuum of quantum fluctuations in a three-dimensional $S=1$ Heisenberg magnet
• Orbital-Exchange and Fractional Quantum Number Excitations in an f-electron Metal Yb${}_2$Pt${}_2$Pb
• Two-dimensional spin liquid behaviour in the triangular-honeycomb antiferromagnet TbInO${}_3$
• Absent pinch points and emergent clusters: further neighbour interactions in the pyrochlore Heisenberg antiferromagnet
• The case for a U(1)${}_{\pi }$ Quantum Spin Liquid Ground State in the Dipole-Octupole Pyrochlore Ce${}_2$Zr${}_2$O${}_7$
• Geometric frustration inherent to the trillium lattice, a sublattice of the B20 structure
• Magnetic field induced quantum spin liquid in the two coupled trillium lattices of K${}_2$Ni${}_2$(SO${}_4$)${}_3$
• Magnetic excitations of the classical spin liquid MgCr2O4
• Mesoscopic Phase Coherence in a Quantum Spin Fluid
• Kinetically Inhibited Order in a Diamond-Lattice Antiferromagnet
• Fate of partial order on the trillium and distorted windmill lattices
• Ground-state selection and spin-liquid behaviour in the classical Heisenberg model on the breathing pyrochlore lattice
• Multi-Q mesoscale magnetism in CeAuSb${}_2$
• Geometric frustration on the trillium lattice in a magnetic metal-organic framework
• Magnetic field effects in an octupolar quantum spin liquid candidate
• Scattering Signatures of Bond-Dependent Magnetic Interactions
• Recent progress on magnetic-field studies on quantum-spin-liquid candidates
• A microscopic model for spiral ordering along (110) on the MnSi lattice
• Low energy magnons in the chiral ferrimagnet ${\text{Cu}}_2{\text{OSeO}}_3$: a coarse-grained approach
• Frustrated magnetic interactions in FeSe
• Weak-coupling to strong-coupling quantum criticality crossover in a Kitaev quantum spin liquid $\alpha$-RuCl${}_3$

Cited by in corpus (9)

• Pseudo-fermion functional renormalization group for spin models
• Dynamics of K${}_2$Ni${}_2$(SO${}_4$)${}_3$ governed by proximity to a 3D spin liquid model
• Continuum of spin excitations in an ordered magnet
• Magnetism and spin dynamics of an S=3/2 frustrated trillium lattice antiferromagnet K2CrTi(PO4)3
• Magnetism and field-induced effects in the S = 5/2 honeycomb lattice antiferromagnet FeP3SiO11
• Short-range Spin Freezing State in the Double Trillium Lattice Spin-Liquid Candidate KSrFe${}_2$(PO${}_4$)${}_3$ Revealed via ${}^{31}$P NMR
• Coexistence of anomalous spin dynamics and weak magnetic order in a chiral trillium lattice K2FeSn(PO4)3
• Frustration and chirality in three-dimensional trillium lattices: Insights and Perspectives
• Multistage development of short-range spin correlations and weak magnetic order in the two coupled trillium lattices of K2Fe2(MoO4)(PO4)2