Distinguishing thermodynamics and spectroscopy for octupolar U(1) spin liquid of Ce-pyrochlores

Abstract

Inspired by the progress on the spin liquid candidates Ce${}_2$Sn${}_2$O${}_7$ and Ce${}_2$Zr${}_2$O${}_7$ where the Ce ions carry the dipole-octupole doublets, we analyze the distinction between the thermodynamic and spectroscopic measurements for the octupolar U(1) spin liquid. Due to the peculiar properties of octupolar U(1) spin liquid and the selective Zeeman coupling, both uniform susceptibility and the spectroscopic measurements only probe the spinon excitations, while the specific heat measures all excitations. After clarifying the contents in each measurement, we observe that, thermodynamics carries the information of single spinon, while the spectroscopy is associated with spinon pairs. Such distinction immediately leads to the multiplicity relation of the excitation gaps from different measurements that include the uniform susceptibility, Knight shift and $1/T_1$ spin lattice relaxation of NMR and $\mu$SR, and the inelastic neutron scattering measurements. We hope this work provides a useful recipe for the identification of fractionalization in the octupolar U(1) spin liquid and other spin liquids.

to appear in Phys Rev Res

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Cited by in corpus (7)

• Thermal Hall effects in quantum magnets
• Hidden orders in spin-orbit entangled correlated insulators
• $\mu$SR Study of the Dipole-Octupole Quantum Spin Ice Candidate Ce${}_2$Zr${}_2$O${}_7$
• Dipolar-octupolar correlations and hierarchy of exchange interactions in Ce${}_2$Hf${}_2$O${}_7$
• Single Crystal Diffuse Neutron Scattering Study of the Dipole-Octupole Quantum Spin Ice Candidate Ce${}_2$Zr${}_2$O${}_7$: No Apparent Octupolar Correlations Above $T=0.05$ K
• Inelastic neutron scattering on Ce pyrochlores: Signatures of electric monopoles
• Z${}_2$ topological orders in kagomé dipolar systems: Feedback from Rydberg quantum simulator