Published in
American Physical Society, Physical review E: Statistical, nonlinear, and soft matter physics, 1(84)
DOI: 10.1103/physreve.84.011107
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Temperature-resonant cyclotron spectra in confined geometries
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Abstract
We consider a two-dimensional gas of colliding charged particles confined to finite size containers of various geometries and subjected to a uniform orthogonal magnetic field. The gas spectral densities are characterized by a broad peak at the cyclotron frequency. Unlike for infinitely extended gases, where the amplitude of the cyclotron peak grows linearly with temperature, here confinement causes such a peak to go through a maximum for an optimal temperature. In view of the fluctuation-dissipation theorem, the reported resonance effect has a direct counterpart in the electric susceptibility of the confined magnetized gas.