Superconductivity from a pseudogapped normal state: a mode-coupling approach to precursor superconductivity

Physical Review B - Condensed Matter and Materials Physics

Volumn 59, Issue 2, 1999, Pages 1354-1357

  Maly, Jiri ^a   Janko B ^a   Levin, K ^a  

^a UNIVERSITY OF CHICAGO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0346966564     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.59.1354     Document Type: Article

References (24)

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14. We thank Ioan Kosztin and Qinjin Chen for pointing out these 2D results.
15. B. Janko, J. Maly, and K. Levin, Phys. Rev. B 56, R11 407 (1997).
16. While we consider the s-wave symmetry case, d-wave symmetry can be readily introduced via the (Formula presented) and in the 2D limit.
17. B. R. Patton, Ph.D. thesis, Cornell University, 1971.
18. The detailed form used here for the T matrix is more readily related to that in Ref. 13 than in Ref. 8. It should also be noted that we have verified that this diagrammatic scheme is consistent with the general criteria for number conservation in G. Baym and L. P. Kadanoff, Phys. Rev. 124, 287 (1961).
19. Here we have dropped a structureless term which may be parametrized as (Formula presented) This is relatively unimportant when the self-energy is integrated over, as in computing (Formula presented) However, it will contribute to properties such as the density of states where it is necessary to regularize the self-energy so that it is never a strict delta function in the normal state.
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22. It should also be noted that the imaginary part of (Formula presented) vanishes at (Formula presented) Moreover, in numerical iterations, expecially near (Formula presented) a Landau-Ginzburg (small (Formula presented) expansion was used to simplify various integrals.
23. Pseudogap effects are expected to increase, as the insulator is approached, as a consequence of a three- to two-dimensional crossover, as well as a reduction in the plasma frequency; see J. Maly, K. Levin, and D. Z. Liu, Phys. Rev. B 54, 15 657 (1996).
24. M. Norman (unpublished).