Abstract
We study the energy levels of charge carriers confined in a magnetic quantum dot in graphene surrounded by a infinite graphene sheet in the presence of energy gap. We explicitly determine the eigenspinors for both valleys K and \(K'\), whereas we use the boundary condition at interface of the quantum dot to obtain the energy levels. We numerically investigate our results and show that the energy levels exhibit the symmetric and antisymmetric behaviors under suitable conditions of the physical parameters. We find that the radial probability can be symmetric or antisymmeric according to the angular momentum is null or no-null. Finally, we show that the application of an energy gap decreases the electron density in the quantum dot, which indicates a temporary trapping of electrons.
Graphic abstract
Similar content being viewed by others
Data Availability Statement
This manuscript has no associated data or the data will not be deposited. [Authors’ comment: Derived data supporting the findings of this study are available from the corresponding author [Ahmed Jellal] on request.]
References
K.S. Novoslov, A.K. Geim, S.V. Morozov, D. Jiang, Y. Zhang, S.V. Dubonos, I.V. Grigorieva, A.A. Firsov, Science 306, 666 (2004)
A.H. Castro Neto, F. Guinea, N.M.R. Peres, K.S. Novoselov, A.K. Geim, Rev. Mod. Phys. 81, 109 (2009)
Y. Zhang, Y.W. Tan, H.L. Strnmer, P. Kim, Nature 438, 201 (2005)
G. Jo, M. Choe, C.Y. Cho, J.H. Kim, W. Park, S. Lee, W.K. Hong, T.W. Kim, S.J. Park, B.H. Honng, Y.H. Kahng, T. Lee, Nanotechnology 21, 175201 (2010)
C. Berger, Z. Song, X. Li, X. Wu, N. Brown, C. Naud, D. Mayou, T. Li, J. Hass, A.N. Marchenkov, E.H. Conrad, P.N. First, W.A. de Heer, Science 312, 1191 (2006)
T. Ohta, A. Bostwick, T. Seyller, K. Horn, E. Rotenberg, Science 313, 951 (2006)
A.V. Rozhkov, G. Giavaras, Y.P. Bliokha, V. Freilikher, F. Nori, Phys. Rep. 503, 77 (2011)
A. De Martino, L. DellAnna, R. Egger, Phys. Rev. Lett. 98, 066802 (2007)
H.-Y. Chen, V. Apalkov, T. Chakraborty, Phys. Rev. Lett. 98, 186803 (2007)
G. Giavaras, F. Nori, Appl. Phys. Lett. 97, 243106 (2010)
G. Giavaras, F. Nori, Phys. Rev. B 83, 165427 (2011)
G. Giavaras, F. Nori, Phys. Rev. B 85, 165446 (2012)
Y.P. Bliokh, V. Freilikher, F. Nori, Phys. Rev. B 81, 075410 (2010)
A.V. Rozhkov, F. Nori, Phys. Rev. B 81, 155401 (2010)
M. Calvo, Phys. Rev. B 84, 235413 (2011)
G. Giavaras, N. Lambert, F. Nori, Phys. Rev. B 87, 115416 (2013)
G. Giavaras, F. Nori, Phys. Rev. B 94, 155419 (2016)
S. Jung et al., Nat. Phys. 7, 245 (2011)
J. Lee et al., Nat. Phys. 12, 1032 (2016)
N.M. Freitag et al., Nano Lett. 16, 5798 (2016)
N. Myoung, J. Ryu, H. Chul Park, S. Joo Lee, S. Woo, Phys. Rev. B 100, 045427 (2019)
A. Belouad, B. Lemaalem, A. Jellal, H. Bahlouli, Mater. Res. Express 7, 015090 (2020)
M. Mirzakhani, M. Zarenia, A. Ketabi, D.R. da Costa, F.M. Peeters, Phys. Rev. B 93, 165410 (2016)
P. Recher, J. Nilsson, G. Burkard, B. Trauzettel, Phys. Rev. B 79, 085407 (2009)
M. Zarenia, J. Milton Pereira, A. Chaves, F.M. Peeters, G.A. Farias, Phys. Rev. B 81, 045431 (2010)
C. Schulz, R.L. Heinisch, H. Fehske, Quant. Matter 4, 346 (2015)
Acknowledgements
The generous support provided by the Saudi Center for Theoretical Physics (SCTP) is highly appreciated by all authors.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Farsi, A., Belouad, A. & Jellal, A. Energy levels of magnetic quantum dots in gapped graphene. Eur. Phys. J. B 94, 9 (2021). https://doi.org/10.1140/epjb/s10051-020-00026-2
Received:
Accepted:
Published:
DOI: https://doi.org/10.1140/epjb/s10051-020-00026-2