Magnetic field effect on the polarizability of bound polarons in quantum nanocry

2019-12-29 05:39:56

energy quantum effective confined phonons

责任者: Feddi, E.;El Haouari, M.;Assaid, E.;Stebe, B.;El Khamkhami, J.;Dujardin, F. 单位: Groupe dHeterostructures et Nanostructures de semiconducteurs, Ecole Normale Superieure, Tetouan, Morocco 来源出处: Physical Review B (Condensed Matter and Materials Physics)(Phys. Rev., B, Condens, Matter Mater. Phys. (USA)),2003/12/15,68(23):235313-1 摘要: We have studied the simultaneous effects of magnetic and electric fields on the ground-state energy of a donor impurity confined in a polar CdSe quantum nanocrystallite embedded in a nonpolar matrix. Calculations are performed in the framework of the effective-mass approximation using the Hassé variational approach. We describe the effect of the quantum confinement by a finite deep potential and we take onto account the interaction between the charge carriers (electron and ion) and the confined longitudinal optical phonons (LO phonons). It is found that the corrections due to the LO phonons on the binding energy, the diamagnetic coefficient, and the polarizability are very important and cannot be neglected or ignored 关键词: binding energy;cadmium compounds;crystallites;effective mass;ground states;II-VI semiconductors;impurity states;interface phonons;interface states;magnetic field effects;nanostructured materials;polarons;variational techniques;magnetic field effect;polarizability;bound polarons;ground-state energy;donor impurity;polar quantum nanocrystallite;nonpolar matrix;effective-mass approximation;Hasse variational approach;finite deep potential;confined longitudinal optical phonons;binding energy;diamagnetic coefficient;CdSe