2016年11月

# Destruction of Magnetic Long-Range Order by Hole-Induced Skyrmions in Two-Dimensional Heisenberg Model

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
• Tomoharu Suda
• ,
• Takao Morinari

85
11

DOI
10.7566/JPSJ.85.114702

PHYSICAL SOC JAPAN

Motivated by the rapid destruction of antiferromagnetic long-range order in hole-doped cuprate high-temperature superconductors, we study the effect of skyrmions on the magnetic long-range order (MLRO). Here we assume that either a skyrmion or antiskyrmion is introduced by a doped hole. Our numerical simulation indicates that in the case of isolated skyrmions, there is an abrupt disappearance of MLRO for doping concentration x &lt; 1.0 x 10(-4). In the case of skyrmion-antiskyrmion pairs, the critical doping concentration x(c) for the suppression of MLRO is given as a function of the separation of the pairs. For a moderate separation of 3-4 lattice constants, we find that the critical doping is consistent with the experimental value.

リンク情報
DOI
https://doi.org/10.7566/JPSJ.85.114702
Web of Science