Search for orbital magnetism in the kagome superconductor $\mathrm{Cs}{\mathrm{V}}_3\mathrm{S}{\mathrm{b}}_5$ using neutron diffraction

Abstract

As many Kagome metals, the topological superconductor AV${}_3$Sb${}_5$ with (A = K,Rb,Cs) hosts a charge density wave . A related chiral flux phase that breaks the time-reversal symmetry has been further theoretically predicted in these materials. The flux phase is associated with loop currents that produce ordered orbital magnetic moments, which would occur at the momentum points, $\mathbf{M}$, characterizing the charge-density wave state. Polarized neutron-diffraction experiments have been performed on an assembly of single crystals of $\mathrm{Cs}{\mathrm{V}}_3\mathrm{S}{\mathrm{b}}_5$ to search for such orbital magnetic moments. No evidence for the existence of a three-dimensionally ordered moment is found at any temperature at the first ${\mathbf{M}}_1$=(1/2,0,0) point in the Brillouin zone within an excellent experimental uncertainty, $i.e.$ $\mathbf{m}=0\pm 0.01{\mu }_B$ per vanadium atom. However, a hint to a magnetic orbital moment is found in the second Brillouin zone at {\bf M${}_2$}=(1/2,1/2,0) at the detection limit of the experiment. Some loop currents patterns flowing $only$ on vanadium triangles are able to account for this finding suggesting an ordered orbital magnetic moment of, at most, $\sim 0.02\pm 0.01{\mu }_B$ per vanadium triangle.

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References in corpus (33)

• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5
• Time-reversal symmetry-breaking charge order in a kagome superconductor
• Magnetic order in the pseudogap phase of high-$T_C$ superconductors
• Concurrence of anomalous Hall effect and charge density wave in a superconducting topological kagome metal
• Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors AV3Sb5 (A=Rb,Cs)
• Chiral flux phase in the Kagome superconductor AV${}_3$Sb${}_5$
• Analysis of Charge Order in the Kagome Metal $A$V${}_3$Sb${}_5$ ($A=$K,Rb,Cs)
• Electronic instabilities of kagome metals: saddle points and Landau theory
• Rotation symmetry breaking in the normal state of a kagome superconductor KV3Sb5
• Fermi surface mapping and the nature of charge density wave order in the kagome superconductor CsV${}_3$Sb${}_5$
• Complex charge density waves at Van Hove singularity on hexagonal lattices: Haldane-model phase diagram and potential realization in kagome metals ${\text{AV}}_3{\text{Sb}}_5$
• Thermodynamic evidence for nematic phase transition at the onset of pseudogap in YBa${}_2$Cu${}_3$O${}_y$
• Three-state nematicity and magneto-optical Kerr effect in the charge density waves in kagome superconductors
• Electronic nature of chiral charge order in the kagome superconductor CsV3Sb5
• Theory of the charge-density wave in $A$V${}_3$Sb${}_5$ kagome metals
• Tunable nodal kagome superconductivity in charge ordered RbV3Sb5
• Absence of local moments in the kagome metal KV3Sb5 as determined by muon spin spectroscopy
• Charge order breaks time-reversal symmetry in CsV${}_3$Sb${}_5$
• Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagome superconductors
• Electron-phonon coupling in the charge density wave state of CsV${}_3$Sb${}_5$
• Loop currents in $A$V${}_3$Sb${}_5$ kagome metals: multipolar and toroidal magnetic orders
• High Resolution Polar Kerr Effect Studies of CsV${}_3$Sb${}_5$: Tests for Time Reversal Symmetry Breaking Below the Charge Order Transition
• Conjoined Charge Density Waves in the Kagome Superconductor CsV3Sb5
• Spatial symmetry constraint of charge-ordered kagome superconductor CsV${}_3$Sb${}_5$
• Coexistence of Multiple Stacking Charge Density Waves in Kagome Superconductor ${\mathrm{CsV}}_3{\mathrm{Sb}}_5$
• No observation of chiral flux current in the topological kagome metal CsV${}_3$Sb${}_5$
• Control of chiral orbital currents in a colossal magnetoresistance material
• Evidence chain for time-reversal symmetry-breaking kagome superconductivity
• Small Fermi pockets intertwined with charge stripes and pair density wave order in a kagome superconductor
• Absence of $E_{2g}$ nematic instability and dominant $A_{1g}$ response in the kagome metal CsV${}_3$Sb${}_5$
• Hidden Magnetic Texture in the Pseudogap Phase of High-Tc $YB{a}_{2}C{u}_3{O}_{6.6}$
• Hidden magnetic order on a kagome lattice for KV3Sb5

Cited by in corpus (10)

• Probing orbital magnetism of a kagome metal CsV3Sb5 by a tuning fork resonator
• Quantum-metric-induced giant and reversible nonreciprocal transport phenomena in chiral loop-current phases of kagome metals
• Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsV${}_3$Sb${}_5$
• Unveiling the nature of electronic transitions in RbV${}_3$Sb${}_5$ with Avoided Level Crossing $\mu$SR
• Odd-parity altermagnetism through sublattice currents: From Haldane-Hubbard model to general bipartite lattices
• Loop-current order through the kagome looking glass
• Orbital current signature using neutron diffraction
• Topological pair density waves in kagome superconductors
• Electron-electron and electron-phonon collision cross sections in CsV3Sb5
• Microscopic evidence for imaginary charge density wave in a kagome metal