Antiferromagnetic hedgehogs with superconducting cores

Details Antiferromagnetic hedgehogs with superconducting cores Antiferromagnetic hedgehogs with superconducting cores

1997-11-11

arxiv.org/abs/cond-mat/9711088v2

Physics

Condensed Matter

Superconductivity

6 pages, 2 figures (REVTEX). Discussion of topological stability clarified. Discussion of experimental settings amplified. To

Scientific paper

10.1103/PhysRevB.58.5731

Excitations of the antiferromagnetic state that resemble antiferromagnetic hedgehogs at large distances but are predominantly superconducting inside a core region are discussed within the context of Zhang's SO(5)-symmetry-based approach to the physics of high-temperature superconducting materials. Nonsingular, in contrast with their hedgehog cousins in pure antiferromagnetism, these texture excitations are what hedgehogs become when the antiferromagnetic order parameter is permitted to "escape" into superconducting directions. The structure of such excitations is determined in a simple setting, and a number of their experimental implications are examined.

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