Singlet-Triplet Switching Induced by Electric Field in Triple Quantum Dots
J. Łuczak and B.R. Bułka
Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
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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.
DOI: 10.12693/APhysPolA.121.1195
PACS numbers: 71.10.-w, 33.57.+c, 73.23.-b, 73.63.Kv