Characterization of Bernstein modes in quantum dots

Details Characterization of Bernstein modes in quantum dots Characterization of Bernstein modes in quantum dots

2002-05-16

arxiv.org/abs/cond-mat/0205345v1

Eur. Phys. J. B 28, 111 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages; embedded figs. 1-3; figs. 4, 5 separate files; accepted in EPJ-B

Scientific paper

10.1140/epjb/e2002-00206-x

The dipole modes of non-parabolic quantum dots are studied by means of their current and density patterns as well as with their local absorption distribution. The anticrossing of the so-called Bernstein modes originates from the coupling with electron-hole excitations of the two Landau bands which are occupied at the corresponding magnetic fields. Non-quadratic terms in the potential cause an energy separation between bulk and edge current modes in the anticrossing region. On a local scale the fragmented peaks absorb energy in complementary spatial regions which evolve with the magnetic field.

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