Quantum Skyrmions and the Destruction of Antiferromagnetic Order in High-Temperature Superconductors

1998/05/27 by E. C. Marino, Marino, E. C.
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed Matter (cond-mat) #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat #hep-th

paper · pdf · doi:10.48550/arxiv.cond-mat/9805359

Latex, 8 pages

arxiv created 1998/05/27 · openalex publication_date 1998/05/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

A continuous field theory which describes the process of doping in high-T_c superconductors of the YBCO-type is presented. It is shown that the introduction of dopants produces the creation of skyrmion topological excitations on the antiferromagnetic background. The energy of these excitations is evaluated. Destruction of the Néel ground state occurs for a critical value δ_C of the doping parameter for which the skyrmion energy vanishes. We evaluate this at zero temperature, obtaining δ_C = 0.39 ± 0.03 which agrees with the experimental value δ_C^exp = 0.41 ± 0.02.

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