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


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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  1. 1.
    J. Bardeen, L. N. Cooper, and J. R. Schrierler,Phys. Rev. 108, 1175 (1957).MATHCrossRefADSMathSciNetGoogle Scholar
  2. 2.
    P. B. Allen and B. Mitrovic,Solid State Phys. 37, 1 (1982).CrossRefGoogle Scholar
  3. 3.
    J. G. Bednorz and K. A. Müller,Rev. Mod. Phys. 60, 565 (1988).CrossRefADSGoogle Scholar
  4. 4.
    A. Bianconi, inPhase Separation in Cuprate Superconductors, K. A. Müller and G. Benedek, eds. (Proc. of the Erice workshop. May 6–12. 1992) (World Scientific, Singapore, 1993). p. 125.Google Scholar
  5. 5.
    A. Bianconi, S. Delia Longa, M. Missori, I. Pettiti, M. Pompa, and A. Soldatov,Jpn. J. Appl. Phys. 32 (suppl. 32-3), 578–580 (1993).Google Scholar
  6. 6.
    A. Bianconi and M. Missori,J. Phys. I France) 4, 361 (1994).CrossRefGoogle Scholar
  7. 7.
    A. Bianconi, M. Missori, N. L. Saini, H. Oyanagi, H. Yamaguchi, D. H. Ha, and Y. Nishihara,J. Supercond. 8, 545 (1995).CrossRefADSGoogle Scholar
  8. 8.
    A. Bianconi, N. L. Saini, T. Rossetti, A. Lanzara, A. Perali, M. Missori, H. Oyanagi, H. Yamaguchi, Y. Nishihara, and D. H. Ha,Phys. Rev. B 54, 12018 (1996).CrossRefADSGoogle Scholar
  9. 9.
    A. Bianconi, M. Lusignoli, N. L. Saini, P. Bordet, A. Kvick, and P. G. Radaelli,Phys. Rev. B 54, 4310 (1996).CrossRefADSGoogle Scholar
  10. 10.
    A. Bianconi, N. L. Saini. A. Lanzara, M. Missori, T. Rossetti, H. Oyanagi, H. Yamaguchi, K. Oka, and T. Ito,Phys. Rev. Lett. 76, 3412 (1996).CrossRefADSGoogle Scholar
  11. 11.
    A. Bianconi,Physica C 235-240, 269 (1994) ; A. Bianconi,Solid State Commun. 91, 1 (1994); A. Bianconi and M. Missori.Solid State Commun. 91, 287 (1994).CrossRefADSGoogle Scholar
  12. 12.
    A. Bianconi,Solid State Commun. 89, 933 (1994).CrossRefADSGoogle Scholar
  13. 13.
    A. Perali, A. Bianconi, A. Lanzara, and N. L. Saini,Solid State Commun. 100, 181 (1996).CrossRefADSGoogle Scholar
  14. 14.
    A. Bianconi, A. Valletta, A. Perali, and N. L. Saini,Solid State Commun. 102, 369 (1997).CrossRefADSGoogle Scholar
  15. 15.
    J.-M. Triscone, D. Fiscer, O. Brunner, L. Antognazza, A. D. Kent, and M. G. Karkut,Phys. Rev. Lett. 64, 804 (1990).CrossRefADSGoogle Scholar
  16. 16.
    Q. Li, X. X. Xi, X. D. Wu, A. Inam, S. Vadlamannati, W. L. McLean, T. Venkatesan, R. Ramesh, D. M. Hwang, J. A. Martinez, and L. Nazar,Phys. Rev. Lett. 64, 3086 (1990).CrossRefADSGoogle Scholar
  17. 17.
    I. Bosovic, J. N. Eckstein, M. E. Klausmeier-Brown, and G. Virshup,J. Supercond. 5, 19 (1992).CrossRefADSGoogle Scholar
  18. 18.
    R. Fastampa, M. Giura, R. Marcon, and E. Silva,Phvs. Rev. Lett. 67, 1795 (1991).CrossRefADSGoogle Scholar
  19. 19.
    B. G. Levi,Phys. Today (June, 1996), p. 17 and references therein; B. Batlogg and V. J. Emery,Nature 382, 20 (1996) and references therein.Google Scholar
  20. 20.
    A. G. Loeser, Z.-X. Shen, D. S. Dessau, D. S. Marshall, C. H. Park, P. Fournier, and A. Kapitulnick,Science 273, 325 (1996).CrossRefADSGoogle Scholar
  21. 21.
    J. M. Harris, Z.-X. Shen, P. J. White, D. S. Marshall, M. C. Schabel, J. N. Eckstein, and I. Bozovic,Phys. Rev. B 54, 15665 (1996).CrossRefADSGoogle Scholar
  22. 22.
    P. J. White, Z.-X. Shen, C. Kim, J. M. Harris, A. G. Loeser, P. Fournier, and A. Kapitulnik,Phys. Rev. B 54, 15669 (1996).CrossRefADSGoogle Scholar
  23. 23.
    Jian Ma, P. Aimeras, R. J. Kelley, H. Berger, G. Magaritondo, X. Y. Cai, Y. Feng, and M. Onellion,Phys. Rev. B 51, 9271 (1995).CrossRefADSGoogle Scholar

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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