Singlet-Triplet Switching Induced by Electric Field in Triple Quantum Dots

• Authors: J. Łuczak , B. Bułka
• Languages of publication: EN

Abstracts

EN

We analyze influence of an external electric field on magnetic properties of a triple quantum dot system in a triangular and linear geometry. The system contains four electrons and is described by an extended Hubbard model which includes electron correlations and exchange processes. The electric field leads to splitting of energy levels (the Stark effect) and to transition between the singlet and triplet states.

Keywords

EN

71.10.-w; 33.57.+c; 73.23.-b; 73.63.Kv

Discipline

• 33.57.+c: Magneto-optical and electro-optical spectra and effects(for electro- and magneto-optical effects in condensed matter spectroscopy, see 78.20.Jq, and 78.20.Ls, respectively)
• 71.10.-w: Theories and models of many-electron systems
• 73.23.-b: Electronic transport in mesoscopic systems
• 73.63.Kv: Quantum dots

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1195-1197

Dates

published

2012-05

Contributors

author

J. Łuczak

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

B. Bułka

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

References

• 1. F. Delgado, Y.-P. Shim, M. Korkusinski, P. Hawrylak, Phys. Rev. B 76, 115332 (2007); F. Delgado, Y.-P. Shim, M. Korkusinski, L. Gaudreau, S.A. Studenikin, A. S. Sachrajda, P. Hawrylak, Phys. Rev. Lett. 101, 226810 (2008); Y.-P. Shim, F. Delgado, P. Hawrylak, Phys. Rev. B 80, 115305 (2009)
• 2. H. Ribeiro, G. Burkard, Phys. Rev. Lett. 102, 216802 (2009)
• 3. N. Baadji, M. Piacenza, T. Tugsuz, F.D. Sala, G. Maruccio, S. Sanvito, Nature Mater. 8, 813 (2009)
• 4. K. Yosida, Theory of Magnetism, Springer, Berlin 1996
• 5. K. A. Chao, J. Spałek, A. M. Oleś, J. Phys. C 10, L271 (1977); K. A. Chao, J. Spalek, A. M. Oles, Phys. Rev. B 18, 3453 (1978)
• 6. T. Kostyrko, B.R. Bułka, Phys. Rev. B 84, 035123 (2011)
• 7. H. Eskes, J. H. Jefferson, Phys. Rev. B 48, 9788 (1993)
• 8. See for example: J. Danon, Yu. V. Nazarov, Phys. Rev. B 80, 041301 (2009)

Identifiers

DOI

10.12693/APhysPolA.121.1195