Magnetic resonance at 41 meV and charge dynamics in YBa_2Cu_3O_6.95

Details Magnetic resonance at 41 meV and charge dynamics in YBa_2Cu_3O_6.95 Magnetic resonance at 41 meV and charge dynamics in YBa_2Cu_3O_6.95

2001-03-02

arxiv.org/abs/cond-mat/0103049v1

Europhys. Lett. Vol. 54, pp. 380 (2001)

Physics

Condensed Matter

Superconductivity

7 Pages, 3 Figures, accepted for publication in Europhysics Letters

Scientific paper

10.1209/epl/i2001-00253-5

We report an Eliashberg analysis of the electron dynamics in YBa_2Cu_3O_6.95. The magnetic resonance at 41 meV couples to charge carriers and defines the characteristic shape in energy of the scattering rate \tau^{-1}(T,\omega) which allows us to construct the charge-spin spectral density I^2\chi(\omega,T) at temperature T. The T dependence of the weight under the resonance peak in I^2\chi(\omega,T) agrees with experiment as does that of the London penetration depth and of the microwave conductivity. Als, at T=0 condensation energy, the fractional oscillator strength in the condensate, and the ratio of gap to critical temperature agree well with the data.

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