Impacts of structural asymmetry on the magnetic response of excitons and biexcitons in single self-assembled In(Ga)As quantum rings

Physical Review B - Condensed Matter and Materials Physics

Volumn 80, Issue 8, 2009, Pages

  Lin, Ta Chun ^a   Lin, Chia Hsien ^a   Ling, Hong Shi ^a   Fu, Ying Jhe ^a   Chang, Wen Hao ^a   Lin, Sheng Di ^a   Lee, Chien Ping ^a  

^a NATIONAL CHIAO TUNG UNIVERSITY   (Taiwan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 70349442447     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.80.081304     Document Type: Article

References (20)

1. L. P. Lévy, G. Dolan, J. Dunsmuir, and H. Bouchiat, Phys. Rev. Lett. 64, 2074 (1990). 10.1103/PhysRevLett.64.2074
2. V. Chandrasekhar, R. A. Webb, M. J. Brady, M. B. Ketchen, W. J. Gallagher, and A. Kleinsasser, Phys. Rev. Lett. 67, 3578 (1991). 10.1103/PhysRevLett.67.3578
3. D. Mailly, C. Chapelier, and A. Benoit, Phys. Rev. Lett. 70, 2020 (1993). 10.1103/PhysRevLett.70.2020
4. A. Fuhrer, S. Luscher, T. Ihn, T. Heinzel, K. Ensslin, W. Wegscheider, and M. Bichler, Nature (London) 413, 822 (2001). 10.1038/35101552
5. A. Lorke, R. J. Luyken, A. O. Govorov, J. P. Kotthaus, J. M. García, and P. M. Petroff, Phys. Rev. Lett. 84, 2223 (2000). 10.1103/PhysRevLett.84.2223
6. M. Bayer, M. Korkusinski, P. Hawrylak, T. Gutbrod, M. Michel, and A. Forchel, Phys. Rev. Lett. 90, 186801 (2003). 10.1103/PhysRevLett.90.186801
7. N. A. J. M. Kleemans, I. M. A. Bominaar-Silkens, V. M. Fomin, V. N. Gladilin, D. Granados, A. G. Taboada, J. M. García, P. Offermans, U. Zeitler, P. C. M. Christianen, J. C. Maan, J. T. Devreese, and P. M. Koenraad, Phys. Rev. Lett. 99, 146808 (2007). 10.1103/PhysRevLett.99.146808
8. A. O. Govorov, S. E. Ulloa, K. Karrai, and R. J. Warburton, Phys. Rev. B 66, 081309 (R) (2002). 10.1103/PhysRevB.66.081309
9. E. Ribeiro, A. O. Govorov, W. Carvalho, Jr., and G. Medeiros-Ribeiro, Phys. Rev. Lett. 92, 126402 (2004). 10.1103/PhysRevLett.92.126402
10. I. R. Sellers, V. R. Whiteside, I. L. Kuskovsky, A. O. Govorov, and B. D. McCombe, Phys. Rev. Lett. 100, 136405 (2008). 10.1103/PhysRevLett.100.136405
11. D. Granados and J. M. García, Appl. Phys. Lett. 82, 2401 (2003). 10.1063/1.1566799
12. H. S. Ling and C. P. Lee, J. Appl. Phys. 102, 024314 (2007). 10.1063/1.2761799
13. P. Offermans P. M. Koenraad, J. H. Wolter, D. Granados, J. M. García, V. M. Fomin, V. N. Gladilin, and J. T. Devreese, Appl. Phys. Lett. 87, 131902 (2005). 10.1063/1.2058212
14. V. M. Fomin, V. N. Gladilin, S. N. Klimin, J. T. Devreese, N. A. J. M. Kleemans, and P. M. Koenraad, Phys. Rev. B 76, 235320 (2007). 10.1103/PhysRevB.76.235320
15. A. Kuther, M. Bayer, A. Forchel, A. Gorbunov, V. B. Timofeev, F. Schäfer, and J. P. Reithmaier, Phys. Rev. B 58, R7508 (1998). 10.1103/PhysRevB.58.R7508
16. A. Babinski, S. Awirothananon, J. Lapointe, Z. Wasilewski, S. Raymond, and M. Potemski, Physica E 26, 190 (2005). 10.1016/j.physe.2004.08.050
17. R. J. Young, R. M. Stevenson, A. J. Shields, P. Atkinson, K. Cooper, D. A. Ritchie, K. M. Groom, A. I. Tartakovskii, and M. S. Skolnick, Phys. Rev. B 72, 113305 (2005). 10.1103/PhysRevB.72.113305
18. M. F. Tsai, H. Lin, C. H. Lin, S. D. Lin, S. Y. Wang, M. C. Lo, S. J. Cheng, M. C. Lee, and W. H. Chang, Phys. Rev. Lett. 101, 267402 (2008). 10.1103/PhysRevLett.101.267402
19. C. E. Pryor and M.-E. Pistol, Phys. Rev. B 72, 205311 (2005). 10.1103/PhysRevB.72.205311
20. For the two equivalent potential valleys in a QR, it may be expected that the exciton wave function is distributed symmetrically in both valleys. However, the calculation reveals that the lowest energy state is the localized exciton in one valley (i.e., either of the two) due to its stronger e-h Coulomb interaction. In other words, the exciton Bohr radius (about 11 nm for InAs QR) is slightly smaller than the ring diameter, which concentrates the exciton wave function into one side of the QR.