Symmetric and asymmetric excitations of a strong-leg quantum spin ladder

Abstract

The zero-field excitation spectrum of the strong-leg spin ladder (C${}_7$H${}_{1}0$N)${}_2$CuBr${}_4$ (DIMPY) is studied with a neutron time-of-flight technique. The spectrum is decomposed into its symmetric and asymmetric parts with respect to the rung momentum and compared with theoretical results obtained by the density matrix renormalization group method. Additionally, the calculated dynamical correlations are shown for a wide range of rung and leg coupling ratios in order to point out the evolution of arising excitations, as e.g. of the two-magnon bound state from the strong to the weak coupling limit.

References in corpus (8)

• Bose-Einstein Condensation in Magnetic Insulators
• Controlling Luttinger liquid physics in spin ladders under a magnetic field
• Thermodynamics of the Spin Luttinger-Liquid in a Model Ladder Material
• One- and Two-Triplon Spectra of a Cuprate Ladder
• 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
• Field-Controlled Magnetic Order in the Quantum Spin-Ladder System (Hpip)2CuBr4
• Spectral and thermodynamic properties of a strong-leg quantum spin ladder

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