Giant internal magnetic fields in Mn doped nanocrystal quantum dots

Citation
Dm. Hoffman et al., Giant internal magnetic fields in Mn doped nanocrystal quantum dots, SOL ST COMM, 114(10), 2000, pp. 547-550
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
114
Issue
10
Year of publication
2000
Pages
547 - 550
Database
ISI
SICI code
0038-1098(2000)114:10<547:GIMFIM>2.0.ZU;2-S
Abstract
We observed a giant splitting of exciton spin sublevels in CdS nanocrystals , each doped on the average by one Mn ion. The splitting, which exists in z ero external magnetic field, is caused by the gigantic internal magnetic fi eld of the Mn ion and results from the enhancement of the short range spin- spin interactions in nanocrystal quantum dots. The splitting is seen in the strong magnetic circular dichroism of the CdS band edge transitions. The m agnitude of the observed band edge splitting is in good agreement with a th eoretical calculation of the effective magnetic field. (C) 2000 Published b y Elsevier Science Ltd. All rights reserved.