The isotropic-to-nematic transition in a two-dimensional fluid of hard
needles: a finite-size scaling study |
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Authors: | R LC Vink |
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Institution: | 1. Institute of Theoretical Physics, Georg-August-Universit?t
G?ttingen, Friedrich-Hund-Platz 1, 37077, G?ttingen, Germany
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Abstract: | Laser dependence of binding energy on exciton in a GaAs quantum well
wire embedded on an AlGaAs wire within the single band effective mass
approximation is investigated. Laser dressed donor binding energy is
calculated as a function of wire radius with the renormalization of the
semiconductor gap and conduction valence effective masses. We take into
account the laser dressing effects on both the impurity Coulomb potential
and the confinement potential. The valence-band anisotropy is included in
our theoretical model by using different hole masses in different spatial
directions. The spatial dielectric function and the polaronic effects have
been employed in a GaAs/AlGaAs quantum wire. The numerical calculations
reveal that the binding energy is found to increase with decrease with the
wire radius, and decrease with increase with the value of laser field
amplitude, the polaronic effect enhances the binding energy considerably and
the binding energy of the impurity for the narrow well wire is more
sensitive to the laser field amplitude. |
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Keywords: | |
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