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The binding energies of heavy‐hole excitons in asymmetric strained wurtzite Alx Ga1‐xN/GaN/Aly Ga1‐yN quantum wells are investigated theoretically with a variational method and a self‐consistent procedure. The screening effect due to the 2‐dimensional electron‐hole gas and the built‐in electric field produced by spontaneous and strain‐induced piezoelectric polarization are considered in our calculation...
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