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Physical Review B
Volumn 51, Issue 1, 1995, Pages 505-514
Charge-transfer fluctuation, d-wave superconductivity, and the B1g Raman phonon in cuprates
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Indexed keywords

EID: 0001396868     PISSN: 01631829     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevB.51.505     Document Type: Article
Times cited : (121)
References (28)
  • 5
    • 0000278279 scopus 로고
    • The effect of the electronic continuum on the phonons of different symmetry has recently been studied by T. P. Devereaux [, ] without using a definite model for the electron phonon coupling and examining the Raman line shape.
    • (1994) Phys. Rev. B , vol.50 , pp. 10287
  • 7
    • 4243427607 scopus 로고
    • See, e.g., C. Thomsen, in Light Scattering in Solids VI, edited by M. Cardona and G. Güntherodt (Springer, Berlin, 1991). The role of interband scattering in the Raman efficiency [related to the anisotropy of γ ( k )] was examined in
    • (1990) Phys. Rev. Lett. , vol.65 , pp. 3048
    • Heyen, T.1
  • 8
    • 84926553571 scopus 로고    scopus 로고
    • The microscopic derivation of our phenomenologically introduced vertex, however, is far beyond the scope of the present paper.
  • 9
    • 84926536045 scopus 로고    scopus 로고
    • S. Barišić and I. Kupči ' c, in High Temperature Superconductivity, Vol. 23, Strongly Correlated Electron Systems I, edited by G. Baskaran, A. E. Ruckenstein, E. Tosatti, and Yu Lu (World Scientific, Singapore, 1990), p. 325.
  • 16
    • 84926605208 scopus 로고    scopus 로고
    • See, e.g., N. W. Ashcroft and N. D. Mermin, Solid State Physics (Saunders College, Philadelphia, 1976), p. 780.
  • 18
    • 84926596919 scopus 로고    scopus 로고
    • If the ratio of the copper and oxygen displacements of the A1g mode is denoted by δCu, we obtain instead of Eq. (26) begineqnarray* g_A_1g}(k,q=0)&=&eE_zhbar over 2M_Oω_A_1g} 1 over2+δ^2_CuM_Cu/M_O} &&×[|φ_x(k)|^2+ |φ_y(k)|^2 && δ_Cu|φ_b(k)|^2(E_b)_z/E_z]. endeqnarray* Since φb(k)=const on the Fermi surface [see Eq. (16a)], even the above more accurate expression does not yield significant (unscreened) coupling.
  • 19
    • 84926582668 scopus 로고    scopus 로고
    • More specifically, chi_λ(q,iω)= sum_k,p φ_λ(k)[iω Φ_k,p(q,iω)+g(q)] φ_λ(p), where φλ are Fermi surface harmonics in channel λ, Φ is the phase space density Kubo function, and g is the wave vector dependent compressibility, [see, e.g., D. Forster, Hydrodynamic Fluctuations, Broken Symmetry, and Correlation Functions (Benjamin, New York, 1975)].
  • 26
    • 84926590800 scopus 로고    scopus 로고
    • and references therein.

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.