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Tunable non-local coupling between Kondo impurities

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: D. Tutuc, B. Popescu, D. Schuh, W. Wegscheider, R.J. Haug

Editorial: arXiv, 1010.5692v2, 2011.

Rezumat:

We study the tuning mechanisms of Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange interaction
between two lateral quantum dots in the Kondo regime. At zero magnetic eld we observe
the expected splitting of the Kondo resonance and estimate the non-local coupling strength as a
function of the asymmetry between the two Kondo temperatures. At nite magnetic elds a chiral
coupling between the quantum dots is observed in the Kondo chessboard and we probe the presence
of the exchange interaction by analyzing the Kondo temperature with magnetic eld.

Cuvinte cheie: quantum dots, Kondo effect, RKKY interaction

URL: http://arxiv.org/abs/1010.5692