The shape resonance of the superconducting gap for a 2D electron gas in a superlattice of quantum stripes with a finite In periodic potential barrier is studied when the Fermi level is tuned near the bottom of the third superlattice subband. The maximum T-c appears at a critical charge density rho(c). For rho > rho(c) (in the underdoped regime) the chemical potential is tuned in a pseudogap region characterized by a decrease of the density of states and an opening of the partial gap at the Fermi surface. The pseudogap is closed for rho < rho, (in the overdoped regime).
T-c amplication and pseudogap at a shape resonance in a superlattice of quantum stripes
Valletta A;
1997
Abstract
The shape resonance of the superconducting gap for a 2D electron gas in a superlattice of quantum stripes with a finite In periodic potential barrier is studied when the Fermi level is tuned near the bottom of the third superlattice subband. The maximum T-c appears at a critical charge density rho(c). For rho > rho(c) (in the underdoped regime) the chemical potential is tuned in a pseudogap region characterized by a decrease of the density of states and an opening of the partial gap at the Fermi surface. The pseudogap is closed for rho < rho, (in the overdoped regime).File in questo prodotto:
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