Magnetic Raman continuum in single crystalline H${}_3$LiIr${}_2$O${}_6$

Abstract

Recently H${}_3$LiIr${}_2$O${}_6$ has been reported as a spin-orbital entangled quantum spin liquid (QSL) [K. Kitagawa et al., Nature {\bf 554}, 341 (2018)], albeit its connection to Kitaev QSL has not been yet identified. To unveil the related Kitaev physics, we perform the first Raman spectroscopy studies on single crystalline H${}_3$LiIr${}_2$O${}_6$ samples. We implement a soft chemical replacement of Li${}^{+}$ with H${}^{+}$ from $\alpha$-Li${}_2$IrO${}_3$ single crystals to synthesize the single crystal samples of the iridate second generation H${}_3$LiIr${}_2$O${}_6$. The Raman spectroscopy can be used to diagnose the QSL state since the magnetic Raman continuum arises from a process involving pairs of fractionalized Majorana fermionic excitation in a pure Kitaev model. We observe a broad dome-shaped magnetic continuum in H${}_3$LiIr${}_2$O${}_6$, in line with theoretical expectations for the two-spin process in the Kitaev QSL. Our results establish the close connection to the Kitaev QSL physics in H${}_3$LiIr${}_2$O${}_6$.

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Cited by in corpus (17)

• Orbital effects in solids: basics, recent progress and opportunities
• The Chemistry of Quantum Spin Liquids
• Beyond Kitaev physics in strong spin-orbit coupled magnets
• Dynamic fingerprint of fractionalized excitations in single-crystalline Cu${}_3$Zn(OH)${}_6$FBr
• Quantum Paraelectricity in the Kitaev Quantum-Spin-Liquid Candidates H${}_3$LiIr${}_2$O${}_6$ and D${}_3$LiIr${}_2$O${}_6$
• Kitaev magnetism through the prism of lithium iridate
• Probing signatures of fractionalization in candidate quantum spin liquid Cu2IrO3 via anomalous Raman scattering
• Momentum-independent magnetic excitation continuum in the honeycomb iridate H${}_3$LiIr${}_2$O${}_6$
• Magnetic Excitations and Interactions in the Kitaev Hyperhoneycomb Iridate $\beta$-Li${}_2$IrO${}_3$
• Pressure tuning of structure, magnetic frustration and carrier conduction in Kitaev spin liquid candidate Cu${}_2$IrO${}_3$: X-ray, Raman, magnetic susceptibility, resistivity and first-principles analysis
• Raman fingerprints of fractionalized Majorana excitations in honeycomb iridate Ag${}_3$LiIr${}_2$O${}_6$
• Gauge symmetry of excited states in projected entangled-pair state simulations
• (H,Li)${}_6$Ru${}_2$O${}_6$ : a possible zero-field Ru${}^{3+}$-based Kitaev Quantum Spin Liquid
• Three-dimensional Sandglass Magnet with Non-Kramers ions
• Signatures of Floquet Engineering in the proximal Kitaev Quantum Spin Liquid H${}_3$LiIr${}_2$O${}_6$ by tr-RIXS
• Field-induced phase transitions in the Kitaev-Heisenberg model: A sign-problem-free quantum Monte Carlo study and possible application to $\alpha$-RuCl3
• Majorana Signatures in Planar Tunneling through a Kitaev Spin Liquid