Abstract
Digital magnetic heterostructures (DMH) are semiconductor structures with magnetic monolayers. Here we study electronic and magnetotransport properties of shallow modulation-doped (ZnSe/ZnCdSe) DMHs with spin-5/2 Mn impurities. We compare the “reservoir” model, possibly relevant to shallow geometries, to the usual “constant-density” model. Our results are obtained by solving the Kohn-Sham equations within the local spin density approximation (LSDA). In the presence of a magnetic field, we show that both models exhibit characteristic behaviors for the electronic structure, two-dimensional carrier density, Fermi level and transport properties. Our results illustrate the relevance of exchange and correlation effects in the study of shallow heterostructures of the group II-VI.
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S. A. Crooker, D. A. Tulchinsky, J. Levy, D. D. Awschalom, R. Garcia, and N. Samarth, Phys. Rev. Lett. 75, 505(1995).
D. D. Awschalom and N. Samarth, J. Magn. Magn. Mater. 200, 130(1999).
J. K. Furdyna, J. Appl. Phys. 64, R29(1988).
J. C. Egues and J. W. Wilkins, Phys. Rev. B 58, R16012(1998).
I. P. Smorchkova and N. Samarth, Appl. Phys. Lett. 69, 1640(1996).
I. P. Smorchkova, N. Samarth, J. M. Kikkawa, and D. D. Awschalom, Phys. Rev. Lett. 78, 3571(1997).
R. Fiederling, M. Keim, G. Reuscher, W. Ossau, G. Schmidt, A. Waag, and L. W. Molenkamp, Nature 402, 787(1999); Y. Ohno, D. K. Young, B. Beschoten, F. Matsukura, H. Ohno, and D. D. Awschalom, Nature 402, 790 (1999); G. Schmidt, G. Richter, P. Grabs, C. Gould, D. Ferrand, and L. W. Molenkamp, Phys. Rev. Lett. 87, 227203 (2001).
J. C. Egues, Phys. Rev. Lett. 80, 4578(1998); J. C. Egues, C. Gould, G. Richter, and L. W. Molenkamp, Phys. Rev. B 64, 195319 (2001); K. Chang and F. M. Peeters, Solid State Commun. 120, 181 (2001); Y. Guo, J. Q. Lu, B. L. Gu, and Y. Kawazoe, Phys. Rev. B 64, 155312 (2001).
G. A. Baraff and D. C. Tsui, Phys. Rev. B 24, 2274(1981).
A. Raymond and H. Sibari, Phys. Status Solid B 183, 159(1994).
M. van der Burgt, V. C. Karavolas, F. M. Peeters, J. Singleton, R. J. Nicholas, F. Herlach, J. J. Harris, M. van Hove, and G. Borghs, Phys. Rev. B 52, 12218(1995).
Y. Takagaki, K. Muraki, and S. Tarucha, Phys. Rev. B 56, 1057(1997).
A. Raymond et al., Semicond. Sci. Technol. 14, 915(1999).
S. P. Hong, K. S. Yi, and J. J. Quinn, Phys. Rev. B 61, 13745(2000).
H. J. P. Freire and J. C. Egues, Braz. J. Phys. 32, 327(2002); H. J. P. Freire and J. C. Egues, cond-mat/0112263 (2001).
S. H. Vosko, L. Wilk, and M. Nusair, Can. J. Phys. 58, 1200(1980).
T. Ando and Y. Uemura, J. Phys. Soc. Jpn. 36, 959(1974).
K. V. Klitzing, G. Dorda, and M. Pepper, Phys. Rev. Lett. 45, 494(1980).
H. L. Stormer and D. C. Tsui, Science 220, 1241(1983).
R. Knobel, N. Samarth, J. G. E. Harris, and D. D. Awschalom, Phys. Rev. B 65, 235327(2002); J. G. E. Harris et al., Phys. Rev. Lett. 86, 4644 (2001).
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Freire, H.J.P., Egues, J.C. “Reservoir Model” for Shallow Modulation-Doped Digital Magnetic Quantum Wells. Journal of Superconductivity 16, 299–302 (2003). https://doi.org/10.1023/A:1023653000964
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DOI: https://doi.org/10.1023/A:1023653000964