2006/08/22 by Efstratios Manousakis · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physleta.2006.11.066
published as Phys. Lett. A 362, 86 (2007) · 4 two-column pages, 3 BW figures, 1 color figure
arxiv created 2006/08/22 · openalex publication_date 2006/12/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We argue that recently reported high resolution angle-resolved photoelectron spectra from cuprates, where an anomalous high-energy dispersion was identified, reveal the internal structure of the hole quasiparticle in quantum antiferromagnets and more importantly it is evidence for the existence of ``string-excitations'' which validate early predictions based on the t-J model. Their energy-momentum despersion as well as the manner in which the spectral weight is transfered to higher energy string excitations as well as the vanishing of the quasiparticle spectral weight near the Γ point, are all in agreement with predictions without adjusting any parameters.