Oscillation and suppression of Kondo temperature by RKKY coupling in two-site Kondo systems
Abstract
We apply our recently developed, selfconsistent renormalization group (RG) method to STM spectra of a two-impurity Kondo system consisting of two cobalt atoms connected by a one-dimensional Cu chain on a Cu surface. This RG method was developed to describe local spin screening in multi-impurity Kondo systems in presence of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction. Using the RKKY interaction of a one-dimensional chain, we explain the experimentally observed suppression and oscillation of the Kondo temperature, , as a function of the length of the chain and the corresponding RKKY interaction parameter , regardless of the RKKY coupling being ferromagnetic or antiferromagnetic.
Keywords
Cite
@article{arxiv.1612.06620,
title = {Oscillation and suppression of Kondo temperature by RKKY coupling in two-site Kondo systems},
author = {Ammar Nejati and Johann Kroha},
journal= {arXiv preprint arXiv:1612.06620},
year = {2017}
}
Comments
Final version, accepted for publication in Journal of Physics: Conference Series (Proceedings of the int. Conference on Strongly Correlated Electron Systems SCES 2016, Hangzhou), 7 pages, 2 figures, typos corrected, some formulations improved