Journal of Superconductivity

, Volume 10, Issue 4, pp 383–387

Tc amplication and pseudogap at a shape resonance in a superlattice of quantum stripes

  • A. Valletta
  • G. Bardelloni
  • M. Brunelli
  • A. Lanzara
  • A. Bianconi
  • N. L. Saini
Article

Abstract

The shape resonance of the superconducting gap for a 2D electron gas in a superlattice of quantum stripes with a finite 1 D periodic potential barrier is studied when the Fermi level is tuned near the bottom of the third superlattice subband. The maximumTc. appears at a critical charge densityTc. Forp > pc (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 forp< pc (in the overdoped regime).

Key Words

Quantum, stripes 2D electron gas pseudogap superlattice 

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Copyright information

© Plenum Publishing Corporation 1997

Authors and Affiliations

  • A. Valletta
    • 1
  • G. Bardelloni
    • 1
  • M. Brunelli
    • 1
  • A. Lanzara
    • 1
  • A. Bianconi
    • 1
  • N. L. Saini
    • 2
  1. 1.Università di Roma “Dipartimento di FisicaRomaItaly
  2. 2.Dipartimento di FisicaIstituto Nazionale di Fisica NucleareRomaItaly

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