Vortex Clusters in Quantum Dots
介观与纳米尺度物理
2009-09-29 v2 强关联电子
摘要
We study electronic structures of two-dimensional quantum dots in strong magnetic fields using mean-field density-functional theory and exact diagonalization. Our numerically accurate mean-field solutions show a reconstruction of the uniform-density electron droplet when the magnetic field flux quanta enter one by one the dot in stronger fields. These quanta correspond to repelling vortices forming polygonal clusters inside the dot. We find similar structures in the exact treatment of the problem using a new type of operator for the analysis. We discuss important differences and limitations of the methods used.
引用
@article{arxiv.cond-mat/0402514,
title = {Vortex Clusters in Quantum Dots},
author = {H. Saarikoski and A. Harju and M. J. Puska and R. M. Nieminen},
journal= {arXiv preprint arXiv:cond-mat/0402514},
year = {2009}
}
备注
4 pages, 4 figures