Phys. Rev. Lett. 64, 788–791 (1990)Nonlocal dynamic response and level crossings in quantum-dot structuresReceived 21 August 1989; published in the issue dated 12 February 1990 Very small quantum-dot structures containing 210 to 25 electrons per dot have been prepared starting from modulation-doped AlGaAs/GaAs heterostructures. The far-infrared response consists of a set of resonances which split, in a magnetic field B, into branches with negative and positive B dispersion. The intersection of these resonances, in classical analogy edge magnetoplasmons, leads to an anticrossing of the dispersions. This resonant coupling is induced by nonlocal interaction which becomes important at small dimensions. © 1990 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.64.788
DOI:
10.1103/PhysRevLett.64.788
PACS:
73.20.Dx, 72.15.Rn, 73.20.Mf
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