Detecting spin fractionalization in a spinon Fermi surface spin liquid

Abstract

Motivated by the recent proposal of the spinon Fermi surface spin liquids for several candidate materials such as YbMgGaO4, we explore the experimental consequences of the external magnetic fields on this exotic state. Specifically, we focus on the weak field regime where the spin liquid state is well preserved and the spinon remain to be a good description of the magnetic excitations. From the spin-1/2 nature of the spinon excitation, we predict the unique features of the spinon continuum when the weak magnetic field is applied to the system. Due to the small energy scale of the exchange interactions between the local moments in the spin liquid candidate like YbMgGaO4, our proposal for the spectral weight shifts and spectral crossing in the magnetic fields can be immediately tested by inelastic neutron scattering experiments. Several other experimental aspects about the spinon Fermi surface and the spinon excitations are discussed and proposed. Our work provides an experimental scheme to examine the fractionalized spinon excitation and the candidate spin liquid states in YbMgGaO4, the 6H-B phase of Ba3NiSb2O9 and other relevant materials.

9 pages, 5 figures, modified title and discussion

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Cited by in corpus (41)

• Valence Bonds in Random Quantum Magnets: Theory and Application to YbMgGaO4
• Rare-earth chalcogenides: A large family of triangular lattice spin liquid candidate
• Gapless spin-liquid state in the structurally disorder-free triangular antiferromagnet NaYbO${}_2$
• Spin-glass ground state in a triangular-lattice compound YbZnGaO${}_4$
• Topography of Spin Liquids on a Triangular Lattice
• Anisotropic-Exchange Magnets on a Triangular Lattice: Spin Waves, Accidental Degeneracies, and Dual Spin Liquids
• Spinon Fermi surface spin liquid in a triangular lattice antiferromagnet NaYbSe${}_2$
• Strong quantum fluctuations in a quantum spin liquid candidate with a Co-based triangular lattice
• The Spinon Fermi Surface U(1) Spin Liquid in a Spin-Orbit-Coupled Triangular Lattice Mott Insulator YbMgGaO4
• Spin liquids in geometrically perfect triangular antiferromagnets
• Hierarchy of exchange interactions in the triangular-lattice spin-liquid YbMgGaO${}_4$
• Fractionalized excitations in the partially magnetized spin liquid candidate YbMgGaO4
• Thermal Hall effects in quantum magnets
• Survival of itinerant excitations and quantum spin state transitions in YbMgGaO${}_4$ with chemical disorder
• Spin Liquid versus Spin Orbit Coupling on the Triangular Lattice
• Evidence of Dirac Quantum Spin Liquid in YbZn2GaO5
• Spectral function of the $J_1-J_2$ Heisenberg model on the triangular lattice
• Finite-temperature behavior of a classical spin-orbit-coupled model for ${\text{YbMgGaO}}_4$ with and without bond disorder
• Thermal Hall signatures of non-Kitaev spin liquids in honeycomb Kitaev materials
• Field-Induced Instability of a Gapless Spin Liquid with a Spinon Fermi Surface
• NMR study of the spin excitations in the frustrated antiferromagnet Yb(BaBO${}_3$)${}_3$ with a triangular lattice
• Magnetic field effects on the quantum spin liquid behaviors of NaYbS${}_2$
• Spinon magnetic resonance of quantum spin liquids
• Possible gapless spin liquid in a rare-earth kagomé lattice magnet Tm${}_3$Sb${}_3$Zn${}_2$O${}_{14}$
• Quantum spin state transitions in spin-1 equilateral triangular lattice antiferromagnet Na${}_2$BaNi(PO${}_4$)${}_2$
• Cyclotron resonance inside the Mott gap: a fingerprint of emergent neutral fermions
• Disorder-induced broadening of the spin waves in a triangular-lattice quantum-spin-liquid candidate YbZnGaO${}_4$
• Quantum Spin Supersolid as a precursory Dirac Spin Liquid in a Triangular Lattice Antiferromagnet
• Topological thermal Hall effect for topological excitations in spin liquid: Emergent Lorentz force on the spinons
• Exact diagonalization study of the anisotropic Heisenberg model related to YbMgGaO${}_4$
• Persistent spin dynamics and absence of spin freezing in the $H$-$T$ phase diagram of the 2D triangular antiferromagnet YbMgGaO${}_4$
• Exchange renormalized crystal field excitation in a quantum Ising magnet KTmSe${}_2$
• Collective spinon spin wave in a magnetized U(1) spin liquid
• Topological thermal Hall effect of "magnetic monopoles" in pyrochlore U(1) spin liquid
• Persistent spin dynamics in the pressurized spin-liquid candidate YbMgGaO${}_4$
• Constraining the Parameter Space of a Quantum Spin Liquid Candidate in Applied Field with Iterative Optimization
• Emergent Halperin-Saslow mode and Gauge Glass in quantum Ising magnet TmMgGaO${}_4$
• Modified large-$N$ approach to gapless spin liquids, magnetic orders, and dynamics: Application to triangular lattice antiferromagnets
• Some experimental schemes to identify quantum spin liquids
• Gauge flux generations of weakly magnetized Dirac spin liquid in a kagomé lattice
• Spin dynamics in natural multiferroic pyroxene NaFeSi${}_2$O${}_6$