Turek, Marko and Siewert, Jens and Fabian, Jaroslav (2009) Magnetic circular dichroism in GaxMn1-xAs: Theoretical evidence for and against an impurity band. PHYSICAL REVIEW B, 80 (16): 161201. ISSN 1098-0121,
Full text not available from this repository. (Request a copy)Abstract
Magneto-optical properties of the ferromagnetic semiconductor GaMnAs are studied in a material-specific multiband tight-binding approach. Two realistic models are compared: one has no impurity band while the other shows an impurity band for low Mn concentrations. The calculated magnetic circular dichroism (MCD) is positive for both models proving that, unlike previously asserted, the observed positive MCD signal is inconclusive as to the presence or absence of an impurity band in GaMnAs. The positive MCD is due to the antiferromagnetic p-d coupling and the transitions into the conduction band.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRONIC-STRUCTURE; SEMICONDUCTORS; FERROMAGNETISM; EXCHANGE; MN; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Sep 2020 04:56 |
| Last Modified: | 07 Sep 2020 04:56 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28375 |
Actions (login required)
 |
View Item |
