2001/08/06 by Andreas Laeuchli, Andreas M. Läuchli, Didier Poilblanc +2
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.88.257201
published as Phys. Rev. Lett. 88, 257201 (2002) · 4 pages, Submitted to Physical Review Letters
arxiv created 2001/08/06 · openalex publication_date 2002/06/05 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A lithium dopant in a cuprate spin ladder acts as a vacant (nonmagnetic) site accompanied by an extra hole bound by a Coulomb potential. We find that, although the undoped ladder spin gap is not essentially altered by Li doping, a dopant-magnon bound state appears just below the gap. Contrary to Zn-doped ladders, the spin liquid character of a Li-doped ladder should be robust against antiferromagnetism. We give a possible explanation for the similarity of Zn and Li dopants in underdoped cuprates and propose experimental tests.