Year: 2004
Type: article
Abstract: Exact-diagonalization results for Kondo nanoclusters alloyed with mixed-valence impurities show that tuning the energy spacing $\ensuremath{\Delta}$ drives the system from the Kondo to the Ruderman-Kittel-Kasuya-Yosida (RKKY) regime. The interplay of $\ensuremath{\Delta}$ and disorder gives rise to a $\ensuremath{\Delta}$ versus concentration $T=0$ phase diagram very rich in structure. The parity of the total number of electrons alters the competition between the Kondo and RKKY correlations. The local Kondo temperatures ${T}_{K}$ and RKKY interactions depend strongly on the local environment and overall are enhanced by disorder, in contrast to the hypothesis of ``Kondo disorder'' single-impurity models.
Source: Physical Review B
Authors: C. Verdozzi, Y. Luo, Nicholas Kioussis
Institution: California State University, Northridge
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2040862061