Fabrication and characterization of II-VI diluted magnetic p-n junctions

Valery Kolkovsky 1Renata Butkute 1Elżbieta Janik 1Krzysztof Fronc 1Grzegorz Karczewski 1,2

1. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
2. Universitaet Wuerzburg, Experimentelle Physik II, Am Hubland, Würzburg 97074, Germany

Abstract

The active control of spins in semiconductors leads to significant advances in technology of digital information storage, magnetic recording and sensing. Recently, Zutic and Fabian have theoretically considered a magnetic p-n junction [1, 2]. One side of the device was made of magnetic material with the giant spin splitting and the other one of a nonmagnetic semiconductor. The presence of external magnetic field could allow spin-polarized current generation, spin amplification, voltage control of spin polarization, and a significant extension of spin diffusion range. They predict new phenomena of exponential and giant magnetoresistance, spin-voltaic effect, spin-valve effect, when a non-equilibrium spin is added into the junction.
The goal of this study is to verify experimentally the predictions of Zutic and Fabian. For this purpose a set of p-n junctions with magnetic n-type (CdMnTe) and nonmagnetic p-type (CdZnTe) regions and a set of p-n junctions with non-magnetic n-type (CdTe) and magnetic p-type (CdZnMnTe) region have been grown by Molecular Beam Epitaxy. The content of Mn in CdMnTe varied from 1 to 5 %. The n-type conductivity was obtained by iodine doping. The nonmagnetic p-type CdZnTe contained from 1.0 to 7.5 % of Zn. p-type conductivity was obtained by nitrogen doping. The quality of grown structures was established from the photoluminescence spectra measured at 4K. The carrier (electrons in the magnetic n region and holes in the non-magnetic p region) concentration was evaluated from Hall measurements. The measurements of current-voltage, resistance-voltage and capacitance-voltage characteristics at different temperatures and different values of magnetic field is discussed from the point of view of spin dependent phenomena and compared to theoretical predictions of Zutic and Fabian.
[1] Zutic I., Fabian J., Das Sarma, Phys. Rev. B, 64, p121201 (2001).
[2] Zutic I., Fabian J., Das Sarma, Phys. Rev. Lett, 88, p066603 (2002).

 

Related papers
  1. MBE grown microcavities based on selenide and telluride compounds
  2. Neutron scattering studies of short-period MnTe/ZnTe superlattices: magnetic order, magnon propagation and confinement
  3. Photoluminescence studies of giant Zeeman effect in MBE-grown cobalt-based dilute magnetic semiconductors
  4. Up-conversion and down-conversion processes observed in Er3+, Yb3+ and Mn2+ doped ZnAl2O4 nanoparticles
  5. Synthesis and properties of up-converted NaYF4: Er, Yb nanoparticles for biomedical applications
  6. Structural, morphological and optical properties of ZnAl2O4 nanoparticles co-doped with Er3+and Yb3+ prepared by combustion aerosol synthesis.
  7. Synthesis and properties of NaYF4: Er, Yb, Gd nanoparticles with and without SiO2 coating for biomedical applications.
  8. Designing biosensors based on semiconductor nanoparticles for an early detection of neurodegenerative diseases.
  9. Location of metals in ZnO electrospined nanofibers
  10. ZnO and core/shell ZnO/ZnS nanofibers: Characterization and applications
  11. Monocrystalline character of ZnMgTe shell in the core-shell ZnTe/ZnMgTe nanowires
  12. Synthesis of gallium nitride nanowires by Sublimation Sandwich Method
  13. Raman spectroscopy of ZnTe-based nanowires grown by MBE *
  14. Resonant and non-resonant Raman spectra of CdTe/ZnTe self-assembled quantum dots
  15. Catalytic growth by molecular beam epitaxy and properties of ZnTe-based semiconductor nanowires
  16. MBE Growth and Optical Study of Magnetic CdMnTe Quantum Dots
  17. Time-resolved ODMR investigations of II-VI based DMS heterostructures
  18. Promising high quality short period Fe/Fe-N multilayers deposited by the sputtering
  19. Magnetic stripe domains in Fe/Fe-N multilayers
  20. Quantitative study of Cd atoms distribution in CdTe/ZnTe quantum dots superlattice by HRTEM
  21. Optical properties of CdTe quantum dots
  22. Preparation and characterization of hexagonal MnTe and ZnO layers
  23. p-type conducting ZnO: fabrication and characterisation
  24. Folded Acoustic phonons in (CdTe)n/(MnTe)m superlattices
  25. Area detector as a tool to study properties of the magnetic multilayers by the neutron scattering
  26. Influence of hydrogen adsorption on magnetic properties of Fe films and multilayers
  27. Quantitative transmission electron microscopy investigation of localised stress in heterostructures
  28. Structure characterisation of MBE-grown ZnSe:Cr layers
  29. Medium scale modeling of the CdTe/ZnTe islands the empirical potential and finite element approach
  30. Effect of deposition conditions and annealing on residual stress of ITO films magnetron sputtered on silica

Presentation: oral at E-MRS Fall Meeting 2004, Symposium F, by Valery Kolkovsky
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-05-18 19:22
Revised:   2009-06-08 12:55