Single hole dynamics in dimerized spin liquids

Abstract

The dynamics of a single hole in quantum antiferromagnets is influenced by magnetic fluctuations. In the present work we consider two situations. The first one corresponds to a single hole in the two leg t-J spin ladder. In this case the wave function renormalization is relatively small and the quasiparticle residue of the S=1/2 state remains close to unity. However at large t/J there are higher spin (S=3/2,5/2,..) bound states of the hole with the magnetic excitations, and therefore there is a crossover from quasiparticles with S=1/2 to quasiparticles with higher spin. The second situation corresponds to a single hole in two coupled antiferromagnetic planes very close to the point of antiferromagnetic instability. In this case the hole wave function renormalization is very strong and the quasiparticle residue vanishes at the point of instability.

12 pages, 3 figures

References in corpus (3)

• Novel approach to description of spin liquid phases in low-dimensional quantum antiferromagnets
• Bound states of magnons in the S=1/2 quantum spin ladder
• Excitation spectrum of the S=1/2 quantum spin ladder with frustration: elementary quasiparticles and many-particle bound states

Cited by in corpus (10)

• Spin orthogonality catastrophe in two-dimensional antiferromagnets and superconductors
• Single hole dynamics in the t-J model on two- and three-leg ladders
• Single-hole dynamics in dimerized and frustrated spin-chains
• The spectral function of Mott-insulating Hubbard ladders: From fractionalized excitations to coherent quasi-particles
• Studies of the t-J two-leg ladder via series expansions
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Bond particle theory for the pseudogap phase of underdoped cuprates
• Two-Hole and Four-Hole Bound States in a t-J Ladder at half-filling
• The t-Jz ladder
• Effect of phase string on single-hole dynamics in the two-leg Hubbard ladder