Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum

Dahm T, Scalapino DJ (2018)
PHYSICAL REVIEW B 97(18): 4.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
A phenomenological spin-fluctuation analysis [Dahm et al., Nat. Phys. 5, 217 (2009)], based upon inelastic neutron scattering (INS) and angular resolved photoemission spectroscopy (ARPES) data for YBCO6.6 (T-c = 61 K), is used to calculate the functional derivative of the d-wave eigenvalue lambda(d) of the linearized gap equation with respect to the imaginary part of the spin susceptibility. chi '' (q,omega) at 70K. For temperatures near T-c, the variation of T-c with respect to. chi '' (q,omega) is proportional to this functional derivative. We find that above an energy similar to 4T(c) the functional derivative becomes positive so that adding spin-fluctuation spectral weight at higher frequencies leads to an increase in T-c. The strongest pairing occurs for large momentum transfers, and small momentum spin-fluctuations suppress the pairing.
Erscheinungsjahr
Zeitschriftentitel
PHYSICAL REVIEW B
Band
97
Ausgabe
18
Art.-Nr.
4
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Dahm T, Scalapino DJ. Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum. PHYSICAL REVIEW B. 2018;97(18): 4.
Dahm, T., & Scalapino, D. J. (2018). Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum. PHYSICAL REVIEW B, 97(18), 4. doi:10.1103/PhysRevB.97.184504
Dahm, T., and Scalapino, D. J. (2018). Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum. PHYSICAL REVIEW B 97:4.
Dahm, T., & Scalapino, D.J., 2018. Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum. PHYSICAL REVIEW B, 97(18): 4.
T. Dahm and D.J. Scalapino, “Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum”, PHYSICAL REVIEW B, vol. 97, 2018, : 4.
Dahm, T., Scalapino, D.J.: Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum. PHYSICAL REVIEW B. 97, : 4 (2018).
Dahm, Thomas, and Scalapino, D. J. “Dependence of T-c on the q-omega structure of the spin-fluctuation spectrum”. PHYSICAL REVIEW B 97.18 (2018): 4.