Barlowite: A Spin-1/2 Antiferromagnet with a Geometrically Perfect Kagome Motif

Abstract

We present thermodynamic studies of a new spin-1/2 antiferromagnet containing undistorted kagome lattices---barlowite Cu${}_4$(OH)${}_6$FBr. Magnetic susceptibility gives ${\theta }_{CW}$ = $-$136 K, while long-range order does not happen until $T_N$ = 15 K with a weak ferromagnetic moment $\mu$ $<$ 0.1${\mu }_B$/Cu. A 60 T magnetic field induces a moment less than 0.5${\mu }_B$/Cu at $T$ = 0.6 K. Specific-heat measurements have observed multiple phase transitions at $T\ll$ $\mid$${\theta }_{CW}$$\mid$. The magnetic entropy of these transitions is merely 18% of $k_B$ln2 per Cu spin. These observations suggest that nontrivial spin textures are realized in barlowite with magnetic frustration. Comparing with the leading spin-liquid candidate herbertsmithite, the superior interkagome environment of barlowite sheds light on new spin-liquid compounds with minimum disorder. The robust perfect geometry of the kagome lattice makes charge doping promising.

arXiv comment5 pages, 3 figures, 1 table

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Cited by in corpus (49)

• Quantum Spin Liquids
• Herbertsmithite and the Search for the Quantum Spin Liquid
• The Chemistry of Quantum Spin Liquids
• Gapless ground state in the archetypal quantum kagome antiferromagnet ZnCu${}_3$(OH)${}_6$Cl${}_2$
• Gapped spin-1/2 spinon excitations in a new kagome quantum spin liquid compound Cu${}_3$Zn(OH)${}_6$FBr
• Quantum Magnetism in Minerals
• Magnetic behavior of volborthite Cu3V2O7(OH)2(H2O)2 determined by coupled trimers rather than frustrated chains
• Experimental signatures of quantum and topological states in frustrated magnetism
• Barlowite as a canted antiferromagnet: theory and experiment
• From Claringbullite to a new spin liquid candidate Cu${}_3$Zn(OH)${}_6$FCl
• Materializing Rival Ground States in the Barlowite Family of Kagome Magnets: Quantum Spin Liquid, Spin Ordered, and Valence Bond Crystal States
• Weyl magnons in noncoplanar stacked kagome antiferromagnets
• Single crystal growth of Cu4(OH)6BrF and universal behavior in quantum spin liquid candidates synthetic barlowite and herbertsmithite
• Prospect of quantum anomalous Hall and quantum spin Hall effect in doped kagome lattice Mott insulators
• Dynamic fingerprint of fractionalized excitations in single-crystalline Cu${}_3$Zn(OH)${}_6$FBr
• Reduction of magnetic interlayer coupling in barlowite through isoelectronic substitution
• A Kagome Map of Spin Liquids: from XXZ to Dzyaloshinskii-Moriya Ferromagnet
• From magnetic order to quantum disorder: a $\mu$SR study of the Zn-barlowite series of $S=\frac{1}{2}$ kagomé antiferromagnets, Zn${}_x$Cu${}_{4-x}$(OH)${}_6$FBr
• Effect of Zn doping on the antiferromagnetism in kagome Cu${}_{4-x}$Zn${}_x$(OH)${}_6$FBr
• Selective doping Barlowite for quantum spin liquid: a first-principles study
• Synthesis-Dependent Properties of Barlowite and Zn-Substituted Barlowite
• Electron doping of proposed quantum spin liquid kagomé Zn-Cu hydroxyl-halides produces localized states in the band gap
• Kagome quantum spin systems in the atacamite family
• Site-Specific Structure at Multiple Length Scales in Kagome Quantum Spin Liquid Candidates
• Stability frontiers in the AM${}_6$X${}_6$ kagome metals: The LnNb${}_6$Sn${}_6$ (Ln:Ce-Lu,Y) family and density-wave transition in LuNb${}_6$Sn${}_6$
• Metal-insulator transition and intermediate phases in the kagome lattice Hubbard model
• Nuclear and Magnetic Structures of the Frustrated Quantum Antiferromagnet Barlowite, Cu${}_4$(OH)${}_6$FBr
• Finite-temperature phase transition to a Kitaev spin liquid phase on a hyperoctagon lattice: A large-scale quantum Monte Carlo study
• Magnetic resonance as a local probe for kagomé magnetism in Barlowite Cu${}_4$(OH)${}_6$FBr
• The route to magnetic order in the spin-$1/2$ kagome Heisenberg antiferromagnet: The role of interlayer coupling
• From frustrated magnetism to spontaneous Chern insulators
• Nonlocal effects of low-energy excitations in quantum-spin-liquid candidate Cu${}_3$Zn(OH)${}_6$FBr
• Magnetic phase diagram of Cu${}_{4-x}$Zn${}_x$(OH)${}_6$FBr studied by neutron-diffraction and $\mu$SR techniques
• Antiferromagnetism in kagome $\alpha$-Cu${}_3$Mg(OH)${}_6$Br${}_2$
• Emergence of the spin polarized domains in the kagome lattice Heisenberg antiferromagnet Zn-barlowite (Zn${}_{0.95}$Cu${}_{0.05}$)Cu${}_3$(OD)${}_6$FBr
• Evidence for the topological order in a kagome antiferromagnet
• High energy spin excitations in the quantum spin liquid candidate Zn-barlowite probed by resonant inelastic x-ray scattering
• Role of chemical pressure on the electronic and magnetic properties of spin-1/2 kagome mineral averievite
• NMR evidence of spinon localization in kagome antiferromagnet YCu${}_3$(OH)${}_6$Br${}_2$[Br${}_{1-x}$(OH)${}_x$]
• Short-range order and hidden energy scale in geometrically frustrated magnets
• Topological thermal Hall effect due to Weyl magnons
• $LnC{u}_3(OH{)}_{6}C{l}_3(Ln=Gd,Tb,Dy)$: Heavy Lanthanides on Spin-1/2 Kagome Magnets
• Phase diagram of multiferroic KCu${}_3$As${}_2$O${}_7$(OD)${}_3$
• Topological transitions of spin-excitations in insulating chiral antiferromagnets
• Topological Aspects of Antiferromagnets
• Magnetism of kagome metals $\left({\text{Fe}}_{1-x}{\text{Co}}_x\right)\text{Sn}$ studied by $\mu$SR
• Fluctuating magnetism in Zn-doped averievite with well-separated kagome layers
• Emergence of magnetic long-range order in kagome quantum antiferromagnets
• Local probe investigation of the spin dynamics in the kagome and inter-layers of orthorhombic barlowite Cu${}_4$(OD)${}_6$FBr: ${}^{79}$Br and ${}^{63}$Cu NQR study