Bosonic behavior of excitons and screening: a consistent calculation
Christian Tanguy
Abstract
Excitons have recently been shown to deviate from pure bosons at densities a hundred times smaller than the Mott density. The corresponding calculations relied on the unscreened excitonic ground state wavefunction. A consistent inclusion of screening, by use of the fundamental eigenfunction of the Hulthén potential, vindicates this approximation.
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