Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-24T20:27:33.319Z Has data issue: false hasContentIssue false
  • English
  • Français

Electron Localization, Tunneling and Energy Spectrum for Systems of Double Quantum Dots

Published online by Cambridge University Press:  08 August 2013

Igor Filikhin ,
Sergei Matinyan  and
Branislav Vlahovic
Igor Filikhin
Affiliation:
Department of Physics, North Carolina Central University, 1801 Fayetteville Street, Durham, NC 27707, USA
Sergei Matinyan
Affiliation:
Department of Physics, North Carolina Central University, 1801 Fayetteville Street, Durham, NC 27707, USA
Branislav Vlahovic
Affiliation:
Department of Physics, North Carolina Central University, 1801 Fayetteville Street, Durham, NC 27707, USA
Get access

Abstract

Semiconductor heterostructures as quantum dots demonstrate discrete atom-like energy level structure based on several hundred of electron confinement states. In the case of double QD (DQD) or double QR (DQR), there is a single electron spectrum composed of a set of quasi-doublets. We study these specific spectrum properties with their relation to the electron tunneling in DQD (DCQR) when the wave function of electron localized initially in one of the double quantum object is spread into whole system. The double InAs/GaAs quantum dots are considered within the effective approach. Tunneling in DQD is studied in connection with change of inter-dot distance and QD geometry. There are two types of such tunneling in DQD. The first is related to tunneling in the system of two identical QDs; the second one occurs in the system of non-identical QDs. The tunneling in the DQR is a tunneling in the system with non-identical quantum objects. The quasi-doublets of the DQD spectrum play an important role in the tunneling. We study effect of violation of symmetry of DQD geometry on the tunneling and show that the violation of symmetry makes difficulties for such tunneling.

Keywords

nanostructureelectronic structuresimulation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1551: Symposium R – Nanostructured Semiconductors and Nanotechnology , 2013 , pp. 129 - 134
Copyright
Copyright © Materials Research Society 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Ponomarenko, L.A., Scheidin, F., Katsnelson, M.I., Yang, R., Hill, E.W., Novoselov, K.S., Geim, A.K., Science 320, 350 (2008).CrossRefGoogle Scholar
Baranger, H.U. and Stone, A.D., Phys. Rev. Lett. 63, 414 (1989).Google Scholar
Beenakker, C.W.J. and van Hoiten, H., Phys. Rev. Lett. 63, 1857 (1989).CrossRefGoogle Scholar
Whitney, R.S., Schomerus, H., Kopp, M., Phys. Rev. E 80, 056209 (2009); R.S. Whitney, P. Marconcini, M. Macucci, Phys. Rev. Lett. 102, 186802(2009).CrossRefGoogle Scholar
Filikhin, I., Matinyan, S., Schmid, B.K. and Vlahovic, B., Physica E 42, 1979 (2010).CrossRefGoogle Scholar
Filikhin, I., Matinyan, S. and Vlahovic, B., Phys. Lett. A 375, 620 (2011).CrossRefGoogle Scholar
Filikhin, I., Matinyan, S. G., and Vlahovic, B., Quantum Mechanics of Semiconductor Quantum Dots and Rings, published as a chapter in Fingerprints in the Optical and Transport Properties of Quantum Dots, ed. Al-Ahmadi, Ameenah, (InTech, 2012) pp. 468.Google Scholar
Filikhin, I., Suslov, V. M. and Vlahovic, B., Phys. Rev. B 73, 205332 (2006); I. Filikhin, V. M. Suslov, M. Wu and B. Vlahovic, Physica E 41, 1358(2009).CrossRefGoogle Scholar
Lorke, A., Luyken, R. J., Govorov, A. O., and Kotthaus, J. P., Phys. Rev. Lett. 84, 2223 (2000)CrossRefGoogle Scholar
Filikhin, I., Matinyan, S. G., and Vlahovic, B., Quantum Computers and Computing, 11, 35 (2011); I. Filikhin, S. Matinyan, J. Nimmo, B. Vlahovic, Physica E 43, 1669(2011).Google Scholar