Физика Низких Температур: Том 27, Выпуск 9-10 (Сентябрь 2001), c. 1083-1091 ( к оглавлению , назад )
Bound spin-excitons in two-dimensional electron gas
School of Physics and Astronomy, Beverly and Raymond Sackler Faculty of Exact Sciences Tel Aviv University, Tel Aviv 69978, Israel
Physics Faculty, Ben-Gurion University of the Negev Beer-Sheva 84105, Israel
Received April 23, 2001
A theory of the spin exciton capture by a magnetic impurity in a 2D electron gas is developed. We
consider a resonance model for the electron scattering by a transition metal impurity and calculate the binding potential for spin excitons. This potential is spin selective and is capable of binding a spin exciton with zero angular momentum. In order to trap an exciton with a nonzero angular momentum m, the potential must exceed a certain threshold value, depending on m.