Field-Tuned Quantum Effects in a Triangular-Lattice Ising Magnet

Abstract

We report thermodynamic and neutron scattering measurements of the triangular-lattice quantum Ising magnet TmMgGaO 4 in longitudinal magnetic fields. Our experiments reveal a quasi-plateau state induced by quantum fluctuations. This state exhibits an unconventional non-monotonic field and temperature dependence of the magnetic order and excitation gap. In the high field regime where the quantum fluctuations are largely suppressed, we observed a disordered state with coherent magnon-like excitations despite the suppression of the spin excitation intensity. Through detailed semi-classical calculations, we are able to understand these behaviors quantitatively from the subtle competition between quantum fluctuations and frustrated Ising interactions.

arXiv commentPublished version

References in corpus (34)

• Quantum Spin Liquid States
• Quantum criticality in an Ising chain: experimental evidence for emergent E8 symmetry
• Ising models of quantum frustration
• Evidence for a spinon Fermi surface in a triangular lattice quantum spin liquid candidate
• HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
• Quantum Phase Diagram of the Triangular-Lattice XXZ Model in a Magnetic Field
• Two-dimensional periodic frustrated Ising models in a transverse field
• Interplay of quantum and thermal fluctuations in a frustrated magnet
• Disorder-Induced Entanglement in Spin Ice Pyrochlores
• Experimental Observation of Bethe Strings
• Topological quantum phase transition in the Ising-like antiferromagnetic spin chain BaCo${}_2$V${}_2$O${}_8$
• Symmetry Enriched U(1) Topological Orders for Dipole-Octupole Doublets on a Pyrochlore Lattice
• Kosterlitz-Thouless Melting of Magnetic Order in the Triangular Quantum Ising Material TmMgGaO${}_4$
• The phase diagram of the antiferromagnetic XXZ model on the triangular lattice
• A Comparative Study of the Magnetization Process of Two-Dimensional Antiferromagnets
• Intertwined dipolar and multipolar order in the triangular-lattice magnet TmMgGaO${}_4$
• Evidence of the Berezinskii-Kosterlitz-Thouless Phase in a Frustrated Magnet
• Multipolar phases and magnetically hidden order: Review of the heavy-fermion compound Ce(1-x)La(x)B6
• Quantum Criticality of an Ising-like Spin-1/2 Antiferromagnetic Chain in Transverse Magnetic Field
• Fractionalized excitations in the partially magnetized spin liquid candidate YbMgGaO4
• $E_8$ Spectra of Quasi-one-dimensional Antiferromagnet BaCo${}_2$V${}_2$O${}_8$ under Transverse Field
• Selective measurements of intertwined multipolar orders: non-Kramers doublets on a triangular lattice
• Partial up-up-down order with the continuously distributed order parameter in the triangular antiferromagnet TmMgGaO4
• Absence of zero-point entropy in a triangular Ising antiferromagnet
• Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor
• Intrinsic quantum Ising model on a triangular lattice magnet TmMgGaO${}_4$ and beyond
• Quantum versus Classical Spin Fragmentation in Dipolar Kagome Ice Ho3Mg2Sb3O14
• Phase Diagram of Triangular Lattice Quantum Ising Model under External Field
• Intrinsic transverse field in frustrated quantum Ising magnets: its physical origin and quantum effects
• Composite spin and quadrupole wave in the ordered phase of Tb${}_{2+x}$Ti${}_{2-x}$O${}_{7+y}$
• Melting of three-sublattice order in easy-axis antiferromagnets on triangular and Kagome lattices
• Singular ferromagnetic susceptibility of the transverse-field Ising antiferromagnet on the triangular lattice
• Tuning the two-step melting of magnetic orders in a dipolar kagome spin ice by quantum fluctuations
• Neutron diffraction investigation of the H-T phase diagram above the longitudinal incommensurate phase of BaCo2V2O8

Cited by in corpus (5)

• Phase Diagram of Triangular Lattice Quantum Ising Model under External Field
• Exchange renormalized crystal field excitation in a quantum Ising magnet KTmSe${}_2$
• Stripe order and spin dynamics in triangular-lattice antiferromagnet KErSe${}_2$: A single-crystal study with a theoretical description
• Induced quantum magnetism on a triangular lattice of non-Kramers ions in PrMgAl11O19
• Gapless spinon excitations emerging from a multipolar transverse field in the triangular-lattice Ising antiferromagnet NaTmSe2