ESR modes in a Strong-Leg Ladder in the Tomonaga-Luttinger Liquid Phase

Abstract

Magnetic excitations in the strong-leg quantum spin ladder compound (C${}_7$H${}_{10}$N)${}_2$CuBr${}_4$ (known as DIMPY) in the field-induced Tomonaga-Luttinger spin liquid phase are studied by means of high-field electron spin resonance (ESR) spectroscopy. The presence of a gapped ESR mode with unusual non-linear frequency-field dependence is revealed experimentally. Using a combination of analytic and exact diagonalization methods, we compute the dynamical structure factor and identify this mode with longitudinal excitations in the antisymmetric channel. We argue that these excitations constitute a fingerprint of the spin dynamics in a strong-leg spin-1/2 Heisenberg antiferromagnetic ladder and owe its ESR observability to the uniform Dzyaloshinskii-Moriya interaction.

References in corpus (12)

• Non-Abelian Anyons and Topological Quantum Computation
• Bose-Einstein Condensation in Magnetic Insulators
• Controlling Luttinger liquid physics in spin ladders under a magnetic field
• Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
• Field-induced Tomonaga-Luttinger liquid phase of a two-leg spin-1/2 ladder with strong leg interactions
• Spin-orbital effects in magnetized quantum wires and spin chains
• Establishing the fundamental magnetic interactions in the chiral skyrmionic Mott insulator Cu2OSeO3 by terahertz electron spin resonance
• Anisotropy of Magnetic Interactions in the Spin-Ladder Compound (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$
• Scaling of temporal correlations in an attractive Tomonaga-Luttinger spin liquid
• ESR study of the spin ladder with uniform Dzyaloshinskii-Moria interaction
• Field-Induced Gap in a Quantum Spin-1/2 Chain in a Strong Magnetic Field
• On the theory of microwave absorption by the spin-1/2 Heisenberg-Ising magnet

Cited by in corpus (14)

• Novel Crossover in Coupled Spin Ladders
• Spinon magnetic resonance of quantum spin liquids
• Emergent interacting spin islands in a depleted strong-leg Heisenberg ladder
• Angular dependence of electron spin resonance for detecting quadrupolar liquid state of frustrated spin chains
• Topological transition between competing orders in quantum spin chains
• Electron spin resonance for the detection of long-range spin nematic order
• Dimensional modulation of spontaneous magnetic order in quasi-two-dimensional quantum antiferromagnets
• Multi-triplet bound states and finite-temperature dynamics in highly frustrated quantum spin ladders
• Evidence for pressure induced unconventional quantum criticality in the coupled spin ladder antiferromagnet C${}_9$H${}_{18}$N${}_2$CuBr${}_4$
• Magnetic phase diagram of a spin S=1/2 antiferromagnetic two-leg ladder in the presence of modulated along legs Dzyaloshinskii-Moriya interaction
• Anisotropy-induced soliton excitation in magnetized strong-rung spin ladders
• Field-induced dimer orders in quantum spin chains
• Magnetic resonance of collective paramagnets with gapped excitations spectrum
• Electron spin resonance study of spin relaxation in the strong-leg spin ladder with nonmagnetic dilution