Systematic investigation of influence of n-type doping on electron spin dephasing in CdTe

Details Systematic investigation of influence of n-type doping on electron spin dephasing in CdTe Systematic investigation of influence of n-type doping on electron spin dephasing in CdTe

2010-01-06

arxiv.org/abs/1001.0869v2

Physics

Condensed Matter

Materials Science

8 pages, 2 figures; accepted in Phys. Rev. B

Scientific paper

We used time-resolved Kerr rotation technique to study the electron spin coherence in a comprehensive set of bulk CdTe samples with various concentrations of electrons that were supplied by n-type doping. The electron spin coherence time of 40 ps was observed at temperature of 7 K in p-type CdTe and in n-type CdTe with a low concentration of electrons. The increase of the concentration of electrons leads to a substantial prolongation of the spin coherence time, which can be as long as 2.5 ns at 7 K in optimally doped samples, and to a modification of the g factor of electrons. The influence of the concentration of electrons is the most pronounced at low temperatures but it has a sizable effect also at room temperature. The optimal concentration of electrons to achieve the longest spin coherence time is 17-times higher in CdTe than in GaAs and the maximal low-temperature value of the spin coherence time in CdTe is 70 times shorter than the corresponding value in GaAs. Our data can help in cross-checking the predictions of various theoretical models that were suggested in literature as an explanation of the observed non-monotonous doping dependence of the electron spin coherence time in GaAs.

Affiliated with

Also associated with

No associations

Rating

Systematic investigation of influence of n-type doping on electron spin dephasing in CdTe 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 Systematic investigation of influence of n-type doping on electron spin dephasing in CdTe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systematic investigation of influence of n-type doping on electron spin dephasing in CdTe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-164148