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The electronic states and magnetization of coupled AlGaAs/GaAs quantum dots in magnetic fields

Eshtiaq Hijaz

Department of Physics, Faculty of Science, An-Najah National University, Nablus, West Bank, Palestine

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and

Mohammad K. Elsaid

Department of Physics, Faculty of Science, An-Najah National University, Nablus, West Bank, Palestine

E-mail Address: mkelsaid@najah.edu

Corresponding author.

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https://doi.org/10.1142/S021797921850011XCited by:3 (Source: Crossref)

Abstract

We present a theoretical study of electronic states and magnetization of two interacting electrons confined in coupled quantum dots (CQDs) presented in a magnetic field. We obtain the eigenenergies of the CQD by solving the relative two-dimensional (2D) Hamiltonian using the combined variational–exact diagonalization method. The dependence of magnetization on temperature, magnetic field strength, confining frequency and barrier height has been investigated. We have shown the singlet–triplet transitions in the ground state of the CQD spectra and the corresponding jumps in the magnetization curves. The comparisons show that our results are in very good agreement with the reported works.

Keywords:

PACS: 73.21.La, 65.80.−g

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References

1. R. C. Ashoori et al., Phys. Rev. Lett. 71, 613 (1993). Web of Science, ADS, Google Scholar
2. O. Ciftja, Phys. Scr. 72, 058302 (2013). Web of Science, Google Scholar
3. M. A. Kastner, Rev. Mod. Phys. 64, 849 (1992). Web of Science, ADS, Google Scholar
4. D. Loss and D. P. Divincenzo, Phys. Rev. A 57, 120 (1998). Web of Science, ADS, Google Scholar
5. G. Burkard, D. Loss and D. P. Divincenzo, Phys. Rev. B 59, 2070 (1999). Web of Science, ADS, Google Scholar
6. A. Fock, Z. Phys. 47, 446 (1928). ADS, Google Scholar
7. C. G. Darwin, Proc. Camb. Philos. Soc. 27, 86 (1930). ADS, Google Scholar
8. M. Wagner, M. U. Merkt and A. V. Chaplik, Phys. Rev. B 45, 1951 (1992). Web of Science, ADS, Google Scholar
9. P. Aggarwal et al., Physica E 88, 26 (2017). ADS, Google Scholar
10. P. Aggarwal et al., Physica E 85, 56 (2017). ADS, Google Scholar
11. M. Taut, J. Phys. A, Math. Gen. 27, 1045 (1994). ADS, Google Scholar
12. O. Ciftja and A. A. Kumar, Phys. Rev. B 70, 205326 (2004). Web of Science, ADS, Google Scholar
13. O. Ciftja and M. G. Faruk, Phys. Rev. B 72, 205334 (2005). Web of Science, ADS, Google Scholar
14. B. S. Kandemir, Phys. Rev. B 72, 165350 (2006). Web of Science, ADS, Google Scholar
15. B. S. Kandemir, J. Math. Phys. 46, 032110 (2005). Web of Science, Google Scholar
16. M. Elsaid, Phys. Rev. B 61, 13026 (2000). Web of Science, ADS, Google Scholar
17. M. Elsaid, Semicond. Sci. Technol. 10, 1310 (1995). Web of Science, ADS, Google Scholar
18. M. Elsaid, Superlattices Microstruct. 23, 1237 (1998). Web of Science, ADS, Google Scholar
19. M. Elsaid, M. A. Al-Naafa and S. J. Zugail, J. Comput. Theor. Nanosci. 5, 677 (2008). Google Scholar
20. M. Elsaid, Phys. Status Solidi B 193, 105 (1996). ADS, Google Scholar
21. P. A. Maksym and T. Chakraborty, Phys. Rev. Lett. 65, 108 (1990). Web of Science, ADS, Google Scholar
22. J. J. S. De Groote, J. E. M. Hornos and A. V. Chaplik, Phys. Rev. B 46, 12773 (1992). Web of Science, ADS, Google Scholar
23. N. T. T. Nguyen and F. M. Peeters, Phys. Rev. B 78, 045321 (2008). Web of Science, ADS, Google Scholar
24. F. S. Nammas et al., Physica B 406, 4671 (2011). Web of Science, ADS, Google Scholar
25. B. Boyacioglu and A. Chatterjee, J. Appl. Phys. 112, 083514 (2012). Web of Science, Google Scholar
26. M. Helle, A. Harju and R. M. Nieminen, Phys. Rev. B 72, 205329 (2005). Web of Science, ADS, Google Scholar
27. M. P. Schwarz et al., Appl. Phys. 91, 6875 (2002). Web of Science, Google Scholar
28. E. Räsänen et al., Phys. Rev. B 67, 235307 (2003). Web of Science, ADS, Google Scholar
29. J. I. Climente, J. Planelles and J. L. Movilla, Phys. Rev. B 70, 081301 (2004). Web of Science, ADS, Google Scholar
30. S. Avetisyan, T. Chakraborty and P. Pietiläinen, Physica E 81, 334 (2016). ADS, Google Scholar
31. N. T. T. Nguyen and S. Das Sarma, Phys. Rev. B 83, 235322 (2011). Web of Science, ADS, Google Scholar
32. W. Dybalski and P. Hawrylak, Phys. Rev. B 72, 205432 (2005). Web of Science, ADS, Google Scholar
33. N. Rachid et al., Physica E 41, 568 (2009). ADS, Google Scholar
34. K. L. Janssens, F. M. Peeters and V. A. Schweigert, Phys. Rev. B 63, 205311 (2001). Web of Science, ADS, Google Scholar
35. C. Simserides, A. Zora and G. Triberis, Phys. Rev. B 73, 155313 (2006). Web of Science, ADS, Google Scholar
36. P. Pereyra and S. E. Ulloa, Phys. Rev. B 61, 2128 (2000). Web of Science, ADS, Google Scholar
37. C. D. Simserides et al., Phys. Rev. B 62, 13657 (2000). Web of Science, ADS, Google Scholar
38. M. Elsaid, Phys. Status Solidi B 184, 385 (1994). ADS, Google Scholar
39. V. N. Golovach, A. Khaetskii and D. Loss, Phys. Rev. B 77, 045328 (2008). Web of Science, ADS, Google Scholar