Microscopic Analysis of Spin Coherences in Semiconductor Nanostructures

摘要

The authors have developed microscopic theory for analysis of spin excitations in semiconductor nanocrystals and endohedral fullerenes based on atomistic electronic structure calculations. They have made calculations of shape and size dependence of electronic and excitonic g-factors; examined magnetic properties of Mn:ZnS dilute magnetic semiconductor nanocrystals; made atomistic calculation of coherent spin transfer between nanocrystals linked by organic molecules; calculated structural, magnetic, and transport properties of a high-spin endohedral metallofullerene GdC82; and calculated hyperfine coupling constants for endohedral nitrogen atoms in fullerenes of variable size. The authors make comparisons with experimental data, finding good agreement in all cases validating the microscopic methods developed in this project.