Spin dynamics of electrons in the first excited subband of a high-mobility low-density two-dimensional electron system

Physical Review B - Condensed Matter and Materials Physics

Volumn 80, Issue 19, 2009, Pages

  Luo, Haihui ^a   Qian, Xuan ^a   Ruan, Xuezhong ^a   Ji, Yang ^a   Umansky, Vladimir ^b  

^a INSTITUTE OF SEMICONDUCTORS   (China)

^b WEIZMANN INSTITUTE OF SCIENCE   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77954705112     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.80.193301     Document Type: Article

References (34)

1. S. A. Wolf, D. D. Awschalom, R. A. Buhrman, J. M. Daughton, S. V. Molnár, M. L. Roukes, A. Y. Chtchelkanova, and D. M. Treger, Science 294, 1488 (2001). 10.1126/science.1065389 (Pubitemid 33063913)
2. I. Žutić, J. Fabian, and S. D. Sarma, Rev. Mod. Phys. 76, 323 (2004). 10.1103/RevModPhys.76.323 (Pubitemid 39063520)
3. D. D. Awschalom and M. E. Flatté, Nat. Phys. 3, 153 (2007). 10.1038/nphys551
4. R. R. Parsons, Phys. Rev. Lett. 23, 1152 (1969). 10.1103/PhysRevLett.23. 1152
5. F. Meier and B. P. Zakharchenya, Optical Orientation (North-Holland, Amsterdam, 1984).
6. A. H. Clark, R. D. Burnham, D. J. Chadi, and R. M. White, Phys. Rev. B 12, 5758 (1975). 10.1103/PhysRevB.12.5758
7. Y. Ohno, D. K. Young, B. Beschoten, F. Matsukura, H. Ohno, and D. D. Awschalom, Nature (London) 402, 790 (1999). 10.1038/45509
8. J. M. Kikkawa and D. D. Awschalom, Phys. Rev. Lett. 80, 4313 (1998). 10.1103/PhysRevLett.80.4313
9. P. E. Hohage, G. Bacher, D. Reuter, and A. D. Wieck, Appl. Phys. Lett. 89, 231101 (2006). 10.1063/1.2398909 (Pubitemid 44907188)
10. M. Syperek, D. R. Yakovlev, A. Greilich, J. Misiewicz, M. Bayer, D. Reuter, and A. D. Wieck, Phys. Rev. Lett. 99, 187401 (2007). 10.1103/PhysRevLett.99.187401 (Pubitemid 350023213)
11. X. Z. Ruan, B. Q. Sun, Y. Ji, W. Yang, J. H. Zhao, and Z. Y. Xu, Semicond. Sci. Technol. 23, 075021 (2008). 10.1088/0268-1242/23/7/075021
12. M. H. Mikkelsen, J. Berezovsky, N. G. Stoltz, L. A. Coldren, and D. D. Awschalom, Nat. Phys. 3, 770 (2007). 10.1038/nphys736
13. J. Berezovsky, M. H. Mikkelsen, N. G. Stoltz, L. A. Coldren, and D. D. Awschalom, Science 320, 349 (2008). 10.1126/science.1154798 (Pubitemid 351559595)
14. M. Q. Weng and M. W. Wu, Phys. Rev. B 70, 195318 (2004). 10.1103/PhysRevB.70.195318 (Pubitemid 40139526)
15. I. G. Saveliev, D. D. Bykanov, S. V. Novikov, T. A. Polyanskaya, and H. Ruda, J. Phys.: Condens. Matter 16, 641 (2004). 10.1088/0953-8984/16/4/013
16. K. Morita, H. Sanada, S. Matsuzaka, Y. Ohno, and H. Ohno, Appl. Phys. Lett. 94, 162104 (2009). 10.1063/1.3118584
17. J. Zhou, J. L. Cheng, and M. W. Wu, Phys. Rev. B 75, 045305 (2007). 10.1103/PhysRevB.75.045305
18. X. Z. Ruan, H. H. Luo, Y. Ji, Z. Y. Xu, and V. Umansky, Phys. Rev. B 77, 193307 (2008). 10.1103/PhysRevB.77.193307
19. F. X. Bronold, A. Saxena, and D. L Smith, Phys. Rev. B 70, 245210 (2004). 10.1103/PhysRevB.70.245210 (Pubitemid 40362449)
20. B. M. Ashkinadze, V. Voznyy, E. Cohen, A. Ron, and V. Umansky, Phys. Rev. B 65, 073311 (2002). 10.1103/PhysRevB.65.073311
21. We measured the spin dynamics of the electrons in the GS for comparison with that in the FES with photon energy E p = 1.519 ev and pump/probe power of 5 mW/0.5 mW.
22. We calculated the photoexcited electrons density with a total absorption efficient of 3% and took the absorption ratio between 2DES and bulk GaAs to be 1:1 in the calculation (Ref.).
23. S. Pfalz, R. Winkler, T. Nowitzki, D. Reuter, A. D. Wieck, D. Hägele, and M. Oestreich, Phys. Rev. B 71, 165305 (2005). 10.1103/PhysRevB.71.165305 (Pubitemid 41749437)
24. The Larmor precession frequency of holes is significantly broadened. It may be ascribed to the mixing of heavy-hole exciting and light-hole exciting by the large spectral width of femtosecond laser pulse (∼ 10 meV).
25. E. L. Ivchenko, Optical Spectroscopy of Semiconductor Nanostructures (Alpha Science International, Hanow, UK, 2005).
26. F. Zhang, H. Z. Zheng, Y. Ji, J. Liu, and G. R. Li, EPL 83, 47007 (2008). 10.1209/0295-5075/83/47007
27. The reason for the relatively long hole spin lifetime is not known yet.
28. Note that we finely tuned the wavelength of the pulse laser to follow the shift of the FES as we increased the temperature.
29. J. N. Heyman, K. Unterrainer, K. Craig, B. Galdrikian, M. S. Sherwin, K. Campman, P. F. Hopkins, and A. C. Gossard, Phys. Rev. Lett. 74, 2682 (1995). 10.1103/PhysRevLett.74.2682
30. D. Stich, J. Zhou, T. Korn, R. Schulz, D. Schuh, W. Wegscheider, M. W. Wu, and C. Schüller, Phys. Rev. Lett. 98, 176401 (2007). 10.1103/PhysRevLett.98.176401 (Pubitemid 46645543)
31. A. Greilich, R. Oulton, E. A. Zhukov, I. A. Yugova, D. R. Yakovlev, M. Bayer, A. Shabaev, A. L. Efros, I. A. Merkulov, V. Stavarache, D. Reuter and A. Wieck, Phys. Rev. Lett. 96, 227401 (2006). 10.1103/PhysRevLett.96.227401 (Pubitemid 43855969)
32. We think that the g factor mainly depends on the potential inhomogeneity. We also carried out the field dependence measurement of the spin lifetime of FES electrons with pump/probe pulse width of 3 ps (say, a spectral width of only ∼ 0.5 meV). We got similar results (data not shown), indicating a weak energy dependence of the g factor.
33. J. Bardeen and W. Shockley, Phys. Rev. 80, 72 (1950). 10.1103/PhysRev.80.72
34. B. Y. K. Hu and K. Flensberg, Phys. Rev. B 53, 10072 (1996). 10.1103/PhysRevB.53.10072