Determining carrier densities in InMnAs by cyclotron resonance

Details Determining carrier densities in InMnAs by cyclotron resonance Determining carrier densities in InMnAs by cyclotron resonance

2003-07-25

arxiv.org/abs/cond-mat/0307653v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1016/j.physe.2003.08.038

Accurate determination of carrier densities in ferromagnetic semiconductors by Hall measurements is hindered by the anomalous Hall effect, and thus alternative methods are being sought. Here, we propose that cyclotron resonance (CR) is an excellent method for carrier density determination for InMnAs-based magnetic structures. We develop a theory for electronic and magneto-optical properties in narrow gap InMnAs films and superlattices in ultrahigh magnetic fields oriented along [001]. In n-type InMnAs films and superlattices, we find that the e-active CR peak field is pinned at low electron densities and then begins to shift rapidly to higher fields above a critical electron concentration allowing the electron density to be accurately calibrated. In p-type InMnAs, we observe two h-active CR peaks due to heavy and light holes. The lineshapes depend on temperature and line broadening. The light hole CR requires higher hole densities and fields. Analyzing CR lineshapes in p-films and superlattices can help determine hole densities.

Affiliated with

Also associated with

No associations

Rating

Determining carrier densities in InMnAs by cyclotron resonance does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Determining carrier densities in InMnAs by cyclotron resonance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining carrier densities in InMnAs by cyclotron resonance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-444954