Year: 2005
Type: article
Abstract: Exact diagonalization calculations reveal that the energy spacing $\ensuremath{\Delta}$ in the conduction band tunes the interplay between the local Kondo and nonlocal Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions, giving rise to a Doniach phase diagram for a nanocluster with regions of prevailing Kondo or RKKY correlations. The parity of the total number of electrons alters the competition between the Kondo and RKKY correlations. This interplay may be relevant to experimental realizations of small rings or quantum dots with tunable magnetic properties. Below a critical value ${V}_{c}$ of the hybridization the susceptibility exhibits a low-$T$ exponential activation behavior determined by the interplay of the spin gap and $\ensuremath{\Delta}$.
Source: Physical Review B
Authors: Yan Luo, C. Verdozzi, 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: W1984052159