The superconducting gap for 2D electron gas in a superlattice of quantum stripes with a finite 1D periodic potential barrier is calculated. The resonant enhancement of the superconducting gap is found when the Fermi level is tuned near the bottom of the nth superlattice subband with n ≥ 2. The critical charge density ϱc for maximum Tc at the n = 2 resonance is mainly determined by the stripe width L and vice versa, while it is nearly independent on the amplitude of the potential barrier. The width of the resonance is determined by the interaction cutoff View the MathML source and its shape by the ratio View the MathML source, where ΔEn⊥ is the transversal energy dispersion of the n subband due to the transverse hopping between stripes.
High Tc superconductivity in a superlattice of quantum stripes
PERALI, Andrea;
1997-01-01
Abstract
The superconducting gap for 2D electron gas in a superlattice of quantum stripes with a finite 1D periodic potential barrier is calculated. The resonant enhancement of the superconducting gap is found when the Fermi level is tuned near the bottom of the nth superlattice subband with n ≥ 2. The critical charge density ϱc for maximum Tc at the n = 2 resonance is mainly determined by the stripe width L and vice versa, while it is nearly independent on the amplitude of the potential barrier. The width of the resonance is determined by the interaction cutoff View the MathML source and its shape by the ratio View the MathML source, where ΔEn⊥ is the transversal energy dispersion of the n subband due to the transverse hopping between stripes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
