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Volumn 65, Issue 1, 2002, Pages 1-13

Inhomogeneous pairing in highly disordered s-wave superconductors

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EID: 85038311142     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.65.014501     Document Type: Article
Times cited : (63)

References (46)
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    • formula presented, Sov. Phys. JETP 34, 1144 (1972)
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    • The importance of spatial amplitude fluctuations in the dirty boson problem was emphasized
    • The importance of spatial amplitude fluctuations in the dirty boson problem was emphasized byK. Sheshadri, H. R. Krishnamurthy, R. Pandit, and T. V. Ramakrishnan, Phys. Rev. Lett. 75, 4075 (1995).
    • (1995) Phys. Rev. Lett. , vol.75 , pp. 4075
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  • 20
    • 85038300210 scopus 로고    scopus 로고
    • The effect of disorder on the Coulomb interactions through (formula presented) has been studied (see Ref. 5 and references therein). However, Coulomb interactions in an inhomogeneous system could produce qualitatively new effects. For example, (a) the effective attraction between electrons could become inhomogeneous producing regions where the pairing amplitude is suppressed with locally gapless excitations. (b) Coulomb effects plus disorder could produce local moments that could be pair breaking
    • The effect of disorder on the Coulomb interactions through (formula presented) has been studied (see Ref. 5 and references therein). However, Coulomb interactions in an inhomogeneous system could produce qualitatively new effects. For example, (a) the effective attraction between electrons could become inhomogeneous producing regions where the pairing amplitude is suppressed with locally gapless excitations. (b) Coulomb effects plus disorder could produce local moments that could be pair breaking.
  • 23
    • 85038299510 scopus 로고    scopus 로고
    • For (formula presented), we estimate, from the asymptotic decay of the BCS pair wave function, that the pure (formula presented) (in units of the lattice spacing). In the presence of disorder, the coherence length can only be smaller than this estimate
    • For (formula presented), we estimate, from the asymptotic decay of the BCS pair wave function, that the pure (formula presented) (in units of the lattice spacing). In the presence of disorder, the coherence length can only be smaller than this estimate.
  • 30
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    • This idea can be used to obtain an upper bound on
    • This idea can be used to obtain an upper bound on (formula presented) as shown byA. Paramekanti, N. Trivedi, and M. Randeria, Phys. Rev. B 57, 11 639 (1998).
    • (1998) Phys. Rev. B , vol.57 , pp. 11 639
    • Paramekanti, A.1    Trivedi, N.2    Randeria, M.3
  • 32
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    • Ph.D. thesis, Tata Institute of Fundamental Research
    • A. Ghosal, Ph.D. thesis, Tata Institute of Fundamental Research, 2000.
    • (2000)
    • Ghosal, A.1
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    • For a review, see, edited by A. Griffin, D. Snoke, and S. Stringari (Cambridge University Press, Cambridge
    • For a review, see M. Randeria, in Bose-Einstein Condensation, edited by A. Griffin, D. Snoke, and S. Stringari (Cambridge University Press, Cambridge, 1995).
    • (1995) Bose-Einstein Condensation
    • Randeria, M.1
  • 38
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    • One must keep in mind here that the main assumption of our model is the neglect of Coulomb interactions as discussed in Sec. II and Ref. 19
    • One must keep in mind here that the main assumption of our model is the neglect of Coulomb interactions as discussed in Sec. II and Ref. 19.
  • 41
    • 85038307984 scopus 로고    scopus 로고
    • unpublished
    • S. H. Pan et al. (unpublished).
    • Pan, S.H.1


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