Switchable Multiple Spin States in the Kondo description of Doped Molecular Magnets.
We show that introducing electrons in magnetic clusters and molecular magnets lead to rich phase diagrams with a variety of low-spin and high-spin states allowing for multiple switchability. The analysis is carried out for a quantum spin-fermion model using the exact diagonalization, and the cluster mean-field approach. The model is relevant for a number of molecular magnets with triangular motifs consisting of transition metal ions such as Cr, Cu and V. Re-entrant spin-state behavior and chirality on-off transitions exist over a wide parameter regime. A subtle competition among geometrical frustration effects, electron itinerancy, and Kondo coupling at the molecular level is highlighted. Our results demonstrate that electron doping provides a viable mean to tame the magnetic properties of molecular magnets towards potential technological applications.
IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany.|Dresden Center for Computational Material Science, TU Dresden, 01062 Dresden, Germany.
Rajyavardhan
R
Ray
Indian Institute of Science Education and Research (IISER) Mohali, Sec-81, Knowledge City, PO Manauli, Punjab, 140306, India.
Sanjeev
S
Kumar