POSSIBLE SELF-TRAPPED MAGNETIC POLARON IN EUSE

To our knowledge, there has been no experimental report supporting the existence of the self-trapped magnetic polaron (STMP) indisputably. T he present calculation, with use of accurate interaction between local ized f spins, enables us to make conclusions about the possible self-t rapped magnetic polaron in EuSe, providing that both the values for th e effective mass and the d-f exchange interaction used in the calculat ion are appropriate to this material. The calculated STMP is the typic al large magnetic polaron accompanying the induced ferromagnetic regio n with the radius of the 2-3 lattice constant. To examine this conclus ion, we analyze the experimental result for Eu-rich EuSe; the analysis reveals the strong magnetic polaron effect in EuSe. Further experimen tal confirmation of the existence of the STMP would be desired.