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arXiv · 1205.3677

Symmetry Analysis of Holes Localized on a Skyrmion in a Doped Antiferromagnet

N. D. Vlasii·C. P. Hofmann·F. -J. Jiang·U. -J. Wiese
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Abstract

We use the low-energy effective field theory for holes coupled to the staggered magnetization in order to investigate the localization of holes on a Skyrmion in a square lattice antiferromagnet. When two holes get localized on the same Skyrmion, they form a bound state. The quantum numbers of the bound state are determined by the quantization of the collective modes of the Skyrmion. Remarkably, for p-wave states the quantum numbers are the same as those of a hole-pair bound by one-magnon exchange. Two holes localized on a Skyrmion with winding number $n = 1$ or 2 may have s- or d-wave symmetry as well. Possible relations with preformed Cooper pairs of high-temperature superconductors are discussed.

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N. D. Vlasii, C. P. Hofmann, F. -J. Jiang, U. -J. Wiese. 2012-05-16. Symmetry Analysis of Holes Localized on a Skyrmion in a Doped Antiferromagnet. https://doi.org/10.1103/physrevb.86.155113

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