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VOLUME 58 (1993) | ISSUE 11 | PAGE 901
Coulomb interaction and electronic phase transitions in quantum-well systems
The effect of the Coulomb interaction of electrons on the positions of energy levels and on the localization of the wave function in systems of several quantum wells is studied. If the distance between the extrema of two lower subbands of the energy spectrum is smaller than a critical value characterizing the strength of the interaction, a Coulomb instability occurs in the system and leads to an electronic phase transition.