Efficient spin depolarization in ZnCdSe spin detector: An important factor limiting optical spin injection efficiency in ZnMnSe/ZnCdSe spin light-emitting structures

Applied Physics Letters

Volumn 85, Issue 22, 2004, Pages 5260-5262

  Chen, W M ^a   Buyanova, I A ^a   Kayanuma, K ^b   Chen, Z H ^b   Murayama, A ^b   Oka, Y ^b   Toropov, A A ^c   Sorokin, S V ^c   Ivanov, S V ^c   Kop'ev, P S ^c  

^a LINKÖPING UNIVERSITY   (Sweden)

^b TOHOKU UNIVERSITY   (Japan)

^c IOFFE INSTITUTE   (Russian Federation)

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE CARRIERS; HETEROJUNCTIONS; LIGHT EMISSION; LIGHT POLARIZATION; MAGNETIC FIELDS; RELAXATION PROCESSES; SPECTROSCOPY;

EXCITATION SOURCES; HETEROINTERFACES; SPIN INJECTION; SPINTRONICS;

SEMICONDUCTOR QUANTUM WELLS;

EID: 19944362157     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1830079     Document Type: Article

References (23)

1. For a review, see, e.g., S. A. Wolf, D. D. Awschalom, R. A. Buhrman, J. M. Daughton, S. von Molnar, M. L. Roukes, A. Y. Chtchelkanova, and D. M. Treger, Science 294, 1488 (2001).
2. Y. Ohno, D. K. Young, B. Beschoten, F. Matsukura, H. Ohno, and D. D. Awschalom, Nature (London) 402, 790 (1999).
3. R. Fiederling, M. Keim, G. Reuscher, W. Ossau, G. Schmidt, A. Waag, and L. W. Molenkamp, Nature (London) 402, 787 (1999).
4. J. M. Kikkawa and D. D. Awschalom, Nature (London) 397, 139 (1999).
5. M. Oestreich, J. Mübner, D. Hägele, P. J. Klar, W. Heimbrodt, W. W. Rühle, D. E. Ashenford, and B. Lunn, Appl. Phys. Lett. 74, 1251 (1999).
6. Y. D. Park, B. T. Jonker, B. R. Bennett, G. Itskos, M. Furis, G. Kioseoglou, and A. Petrou, Appl. Phys. Lett. 77, 3989 (1999).
7. B. T. Jonker, Y. D. Park, B. R. Bennett, H. D. Cheong, G. Kioseoglou, and A. Petrou, Phys. Rev. B 62, 8180 (2000).
8. G. Schmidt, R. Fiederling, M. Keim, G. Reuscher, T. Gruber, W. Ossau, A. Waag, and L. W. Molenkamp, Superlattices Microstruct. 27, 297 (2000).
9. Th. Gruber, M. Keim, F. Fiederling, R. Reuscher, S. Schmidt, L. W. Molenkamp, and A. Waag, Appl. Phys. Lett, 78, 1101 (2001).
10. K. Kayanuma, E. Shirado, M. C. Debnath, I. Souma, S. Permogorov, and Y. Oka, Physica E (Amsterdam) 10, 295 (2001).
11. L. Klopotowski, M. Nawrocki, J. A. Gaj, S. Mackowski, and E. Janik, Solid State Commun. 119, 147 (2001).
12. K. Kayanuma, M. C. Debnath, I. Souma, Z. Chen, A. Murayama, M. Kobayashi, H. Miyazaki, and Y. Oka, Phys. Status Solidi B 229, 761 (2002).
13. I. A. Buyanova, G. Ivanov, B. Monemar, W. M. Chen, A. A. Toropov, Y. Terent'ev, S. V. Sorokin, A. V. Lebedev, S. V. Ivanov, and P. S. Kop'ev, Appl. Phys. Lett. 81, 2196 (2002).
14. I. A. Buyanova, G. Yu. Rudko, W. M. Chen, A. A. Toropov, S. V. Sorokin, S.V. Ivanov, and P. S. Kop'ev, Appl. Phys. Lett 82, 1700 (2003).
15. W. M. Becker, Semicond. Semimetals 25, 35 (1988).
16. Strictly speaking, one should take into account contributions from the subband structure and density of states.
17. Spin relaxation to the dark hh excitons, that is |1/2, +3/2 and |-1/2, -3/2), is neglected here as they do not contribute to the monitored PL or merely serve as intermediate states during spin relaxation.
18. + excitation, reflecting the incremental number of the LO phonons involved in spin relaxation. Unfortunately, this cannot be observed in our cw optical orientation experiments [see Fig. 1(b)]. A likely reason could be due to strong alloy and QW width fluctuations causing the broad QW PL linewidth (about 10 meV), such that the onset of each LO step is no longer well defined.
19. S. A. Permogorov, Ya. V. Morozenko, and B. A. Kazennov, Sov. Phys. Solid State 17, 1974 (1975).
20. E. L. Ivchenko, G. E. Pikus, and L. V. Takunov, Sov. Phys. Solid State 20, 1502 (1978).
21. D. A. Tulchinsky, J. J. Baumberg, and D. D. Awschalom, N. Samarth, H. Luo, and J. K. Furdyna, Phys. Rev. B 50, 10851 (1994).
22. W. M. Chen, I. A. Buyanova, G. Yu Rudko, A. G. Mal'shukov, K. A. Chao, A. A. Toropov, S. V. Sorokin, S. V. Ivanov, and P. S. Kop'ev, Phys. Rev. B 67, 125313 (2003).
23. M. Z. Maille, E. A. de Andrada e Silva, and L. J. Sham, Phys. Rev. B 47, 15776 (1993).