Time-resolved ODMR investigations of II-VI based DMS heterostructures

Vitalii Y. Ivanov 1,  Marek Godlewski 1,2,  Dmitri R. Yakovlev 3,  Sergij M. Ryabchenko 4,  Andreas Waag 5,  Grzegorz Karczewski 1

1. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
2. Cardinal Stefan Wyszynski University, College of Science, Warszawa, Poland
3. Experimental Physics II, University of Dortmund, Otto Han, Dortmund 44221, Germany
4. Institute of Physics National Academy of Sciences of Ukraine, prosp. Nauki, 46, Kiev 0365, Ukraine
5. TU Braunschweig, Institute of Semiconductor Technology (IHT), Hans Sommer Str. 66, Braunschweig 38106, Germany

Abstract

Determination of spin relaxation times in DMS nanostructures with 2D electron gas is one of the crucial aims of magneto-optical investigations. In this communication we demonstrate power of a new experimental method developed by us. Time-resolved ODMR is applied to determine spin-related relaxation times in a range of II-VI DMS heterostructures. We investigated ZnMnSe/ZnBeSe and CdMnTe/CdMgTe heterostructures with magnetic quantum wells and with a low density of 2D electron gas. Influence of a microwave radiation (60 GHz ) on excitonic transitions in above-mentioned heterostructures was studied. Setting conditions of magnetic resonance of Mn2+ ions we could suppress magnetization of structures studied. Also a nonresonant (by moving magnetic field out of the resonance) magnetization quenching was observed imposed by a heating of spin subsystem caused by interaction with microwave heated free electrons. These two effects could be separated in a time-resolved study. We could thus directly evaluate their importance and measure characteristic relaxation times for spin-lattice and spin-2D carriers interactions.

Related papers
  1. Effect of annealing on the structure and microstructure of Pr doped ZrO2-Y2O3 nanocrystals
  2. Raman spectroscopy of ZnTe-based nanowires grown by MBE *
  3. Resonant and non-resonant Raman spectra of CdTe/ZnTe self-assembled quantum dots
  4. Synthesis of doped ZnO nanopowders in microwave hydrothermal reactors
  5. Synthesis of Al doped ZnO nanopowders and their enhanced luminescence
  6. How we can stimulate intra-shell emissions of rare earth and transition metal ions in thin films and in nanoparticles
  7. ZnO thin films for organic/inorganic heterojunctions
  8. Combining microwave and pressure techniques for hydrothermal synthesis of ZnO and ZrO2 nanopowders doped with a range of metal ions
  9. Luminescence properties of zinc oxide nanopowders doped with Al ions obtained by the hydrothermal and vapour condensation methods.
  10. Wide band-gap II-VI semiconductors for optoelectronic applications
  11. Low temperature ZnMnO by ALD
  12. Catalytic growth by molecular beam epitaxy and properties of ZnTe-based semiconductor nanowires
  13. ZnMnO Films grown by Atomic Layer Deposition with uniform Mn distribution
  14. Effect of annealing on electrical properties of low temperature ZnO films
  15. Doping of ZnO nanopowders with Mn, Ni and Cr In an ultrasound and microwave driver hydrothermal reaction
  16. Cathodoluminescence study of wide band gap ZnO nanorod heterostructures.
  17. MBE Growth and Optical Study of Magnetic CdMnTe Quantum Dots
  18. Dynamics of spin interactions in DMS heterostructures
  19. Method of Manganese co-doping of LT ZnO films
  20. Photoluminescence of ZnO films studied by femptosecond sapphire:Ti laser
  21. Two color spectroscopy of ZnSe:Cr
  22. Photo-EPR studies of charge tunneling processes in CdxZn(1-x)Se:Fe,Cr (0 ≤ x ≤ 0.3) crystals
  23. Luminescence of CdMnTe Crystals in Magnetic Field
  24. Electrical characterization of ZnO nanorods
  25. Fabrication of ZnO Nanorod-based Single Quantum Well Structures
  26. Luminescence of doped nanoparticles of wide band gap II-VI compounds
  27. Doping of ZnO nanopowders with Mn and Cr in an ultrasound and microwave driven hydrothermal reaction
  28. Quantitative study of Cd atoms distribution in CdTe/ZnTe quantum dots superlattice by HRTEM
  29. Optical properties of CdTe quantum dots
  30. Fabrication and characterization of II-VI diluted magnetic p-n junctions
  31. Folded Acoustic phonons in (CdTe)n/(MnTe)m superlattices
  32. Growth and characterization of thin films of ZnO by Atomic Layer Epitaxy
  33. Dynamics of spin interactions in II-Mn-VI semiconductors studied with time-resolved optically detected magnetic resonance
  34. Influence of n-type doping on light emission properties of GaN layers and GaN-based quantum well structures
  35. Characterization of Luminescence in thick MgZnO Layers and MgZnO/ZnO Quantum Wells
  36. Fe photoionization transition in ZnSSe:Fe crystals - photo-ESR studies
  37. ZnMgO-ZnO based Heterostructures and Nanopillars grown by MOVPE
  38. In-depth and in-plane profiling of InGaN-based laser diodes and heterostructures
  39. Cathodoluminescence study of n-type doped GaN epilayers and GaN/InGaN quantum well structures
  40. Compensation mechanisms in magnesium doped GaN
  41. Optical and magnetic resonance investigations of ZnO crystals doped with transition metal ions
  42. Optical and ODMR study of GaN-based HEMT structures
  43. Structure characterisation of MBE-grown ZnSe:Cr layers
  44. Medium scale modeling of the CdTe/ZnTe islands the empirical potential and finite element approach
  45. Photo-ESR and optical studies of Cr photoionization transition in CdZnSe:Cr crystals
  46. Luminescent properties of wide bandgap materials at room temperature

Presentation: Oral at E-MRS Fall Meeting 2006, Symposium E, by Vitalii Y. Ivanov
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-19 13:22
Revised:   2006-05-19 13:22
Google
 
Web science24.com
© 1998-2008 pielaszek research, all rights reserved Powered by the Conference Engine