Abstract
The intensity and giant circular polarization of edge luminescence in a longitudinal magnetic field have been measured in nitrogen alloys GaAsN under circularly polarized pumping. It has been found that these dependences are shifted with respect to zero field by a value B eff. The magnitude of the internal field B eff increases with the pumping intensity and reaches saturation (≈250 G) at large excitation densities. The saturation of the B eff field with growth of pumping indicates that this is a field of nuclei, polarized dynamically due to hyperfine interaction with optically oriented deep paramagnetic centers, rather than a field of exchange interaction created on the center by spin-polarized photo-excited conduction electrons. The short time of nuclear polarization by electrons (<15 μs), measured under modulation of circular polarization of the exciting light with high frequency, points to a small number of nuclei undergoing hyperfine interaction with an electron localized at a center.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
E. L. Ivchenko, V. K. Kalevich, A. Yu. Shiryaev, et al., J. Phys.: Condens. Matter 22, 465804 (2010).
V. K. Kalevich, M. M. Afanasiev, A. Yu. Shiryaev, et al., Phys. Rev. B 85, 035205 (2012).
M. I. D’yakonov and V. I. Perel’, Sov. Phys. JETP 38, 177 (1974).
I. A. Merkulov, Al. L. Efros, and M. Rosen, Phys. Rev. B 65, 205309 (2002).
Optical Orientation, Ed. by F. Meier and B. Zakharchenya (North-Holland, Amsterdam, 1984).
Spin Physics in Semiconductors, Ed. by M. I. Dyakonov, Springer Series in Solid-State Science (Springer, Berlin, 2008), vol. 157.
A. Abragam and B. Bliney, Electron Paramagnetic Resonance of Transition Ions (Clarendon, Oxford, 1970).
K. V. Kavokin, Semicond. Sci. Technol. 23, 114009 (2008).
A. Yu. Egorov, V. K. Kalevich, M. M. Afanasiev, et al., J. Appl. Phys. 98, 013539 (2005).
V. D. Kul’kov and V. K. Kalevich, Prib. Tekh. Eksp. 5, 196 (1980).
S. N. Jasperson and S. F. Schnatterly, Rev. Sci. Instrum. 40, 761 (1969).
A. Abraham, Principles of Nuclear Magnetism (Oxford Univ. Press, USA, 1983; Inostr. Liter., Moscow, 1963).
D. Paget, G. Lampel, B. Sapoval, et al., Phys. Rev. B 15, 5780 (1977).
X. J. Wang, I. A. Buyanova, F. Zhao, et al., Nature Mater. 8, 198 (2009).
M. I. D’yakonov and V. I. Perel’, Sov. Phys. JETP 36, 995 (1973).
E. L. Ivchenko, E. V. Maksimov, and V. N. Medvedev, Opt. Spectrosc. 47, 609 (1979).
H. Morishita, L. S. Vlasenko, H. Tanaka, et al., Phys. Rev. B 80, 205206 (2009).
W. F. Koehl, B. B. Buckley, F. J. Heremans, et al., Nature 479, 84 (2011).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.K. Kalevich, M.M. Afanasiev, A.Yu. Shiryaev, A.Yu. Egorov, 2012, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2012, Vol. 96, No. 9, pp. 635–640.
The article was translated by the authors.
Rights and permissions
About this article
Cite this article
Kalevich, V.K., Afanasiev, M.M., Shiryaev, A.Y. et al. Optical orientation of nuclei in nitrogen alloys GaAsN at room temperature. Jetp Lett. 96, 567–571 (2013). https://doi.org/10.1134/S0021364012210060
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0021364012210060