Spin injection and spin loss in GaMnN/InGaN light-emitting diodes

I. A. Buyanova, M. Izadifard, W. M. Chen, J. Kim, F. Ren, G. Thaler, C. R. Abernathy, S. J. Pearton, C. H. Pan, G. H. Chen, J. H. Chyi, J. M. Zavada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Electrical and optical spin injection efficiency of GaMnN/InGaN spin LEDs is evaluated. At room temperature, the spin LEDs are shown to exhibit negligible optical and electrical spin injection efficiency despite that the n-type GaMnN spin injector employed is ferromagnetic. On the other hand, carrier supply from GaMnN at low temperatures is accompanied by a reduction (by 1-5%) in optical polarization of the InGaN spin detector (SD) from its intrinsic values measured without carrier supply from GaMnN. This observation seems to indicate some degrees of spin injection from GaMnN with the spin orientation opposite to that of the lowest spin state of the SD. The very low degree of polarization, however, implies efficient spin loss during the spin injection process. From cw- and transient resonant optical orientation studies, the spin loss is attributed to fast spin relaxation within the InGaN spin detector.

Original languageEnglish
Title of host publicationPHYSICS OF SEMICONDUCTORS
Subtitle of host publication27th International Conference on the Physics of Semiconductors, ICPS-27
Pages1399-1400
Number of pages2
DOIs
Publication statusPublished - 2005 Jun 30
EventPHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27 - Flagstaff, AZ, United States
Duration: 2004 Jul 262004 Jul 30

Publication series

NameAIP Conference Proceedings
Volume772
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherPHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27
CountryUnited States
CityFlagstaff, AZ
Period04/7/2604/7/30

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Buyanova, I. A., Izadifard, M., Chen, W. M., Kim, J., Ren, F., Thaler, G., Abernathy, C. R., Pearton, S. J., Pan, C. H., Chen, G. H., Chyi, J. H., & Zavada, J. M. (2005). Spin injection and spin loss in GaMnN/InGaN light-emitting diodes. In PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27 (pp. 1399-1400). (AIP Conference Proceedings; Vol. 772). https://doi.org/10.1063/1.1994637