Abstract
AbstractIn this issue's Editor's Choice, the first high resolution photoluminescence (PL) investigations of isotopically pure silicon are reported. The cover figure shows the PL spectrum of the no‐phonon transitions of an exciton bound to the neutral aluminum acceptor in 28Si, compared with the corresponding result from natural Si. It is seen that in the isotopically purified material the lines are shifted (as indicated by the horizontal arrow) and are sharper than in natural Si. Moreover, the splitting of the A0 ground state, as shown in the level scheme of the inset, is clearly absent in the 28Si sample, demonstrating that this splitting results from the random isotopic composition in natural Si. The paper is an invited presentation from the 10th International Conference on Shallow Level Centers in Semiconductors (SLCS‐10) held in Warsaw, Poland, 24‐27 July 2002.This issue of phys. stat. sol. (b) contains a second paper selected as Editor's Choice, entitled “Tunable spin‐injection and magnetoconductance in a novel 2DEG‐ferromagnet structure” by Y. Jiang and M. B. A. Jalil [2].
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