Evidence for two distinct energy scales in the Raman spectra of YBa2(Cu1-xNix)3O6.95.

@article{Gallais2002EvidenceFT,
  title={Evidence for two distinct energy scales in the Raman spectra of YBa2(Cu1-xNix)3O6.95.},
  author={Yann Gallais and Alain Sacuto and Philippe Bourges and Yvan Sidis and Anne Forget and Doroth{\'e}e Colson},
  journal={Physical review letters},
  year={2002},
  volume={88 17},
  pages={
          177401
        }
}
We report electronic Raman scattering from Ni-substituted YBa2Cu3O6.95 single crystals with T(c) ranging from 92.5 to 78 K. The fully symmetrical A(1g) channel and the B(1g) channel which is sensitive to the d(x(2)-y(2)) gap maximum have been explored. The energy of the B(1g) pair-breaking peak remains constant under Ni doping while the energy of the A(1g) peak scales with T(c) ( E(A(1g))/k(B)T(c) = 5). Our data show that the A(1g) peak tracks the magnetic resonance peak observed in inelastic… 

Figures and Tables from this paper

Superconducting pairing and the pseudogap in the nematic dynamical stripe phase of La2-xSrxCuO4.
TLDR
The present Raman data suggest that Cooper pairs are formed at moving edge dislocations of dynamical charge stripes in anisotropic magnetic excitations of spin-charge stripes.
Pair breaking versus symmetry breaking: Origin of the Raman modes in superconducting cuprates
We performed Raman experiments on superconducting Bi2Sr2(Ca1−xYx)Cu2O8+� (Bi-2212) and YBa2Cu3O6+x (Y-123) single crystals. These results in combination with earlier ones enable us to analyze
Self-energy effects in electronic Raman spectra of doped cuprates due to magnetic fluctuations
We present results for magnetic excitations in doped copper oxides using the random phase approximation and itinerant electrons. In the [1,0] direction the observed excitations resemble dispersive
Raman spectroscopy of metals, high‐temperature superconductors and related materials under high pressure
An overview is presented of recent Raman scattering measurements in metals under conditions of high static pressure in the diamond anvil cell. Also discussed are the practical improvements of the
Independent Control of Low-Energy Resonant States and Polaron States by the Zn-Doping and the Structural Transition in La2−xSrxCuO4 and La2−xBaxCuO4 (x=0.11)
The superconductivity depression mechanisms at x≈1/8 in La2−xBaxCuO4 and Zn substitution in La2−xSrxCuO4 were investigated by Raman scattering. About 80% of low-energy electronic states are
Origin of theA1gandB1gelectronic Raman scattering peaks in the superconducting state ofYBa2Cu3O7−δ
The electronic Raman scattering has been investigated in optimally oxygen doped YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ single crystals as well as in crystals with non-magnetic, Zn, and magnetic, Ni,
Doping dependence of bilayer resonant spin excitations in (Y, Ca)Ba2Cu3O6+x.
TLDR
A simple scaling relationship is found between the characteristic energies and spectral weights of both modes, which indicates that the resonant modes are bound states in the superconducting energy gap, as predicted by the spin-exciton model of the resonan mode.
Charge orders, magnetism and pairings in the cuprate superconductors.
TLDR
An intermediate energy scale is identified where the SC fluctuations are dominant and it is argued that they are unstable towards the formation of a resonant excitonic state at the pseudogap temperature T (*).
...
1
2
3
...

References

SHOWING 1-10 OF 11 REFERENCES
APPL
TLDR
A prototype probability package named APPL (A Probability Programming Language) is presented that can be used to manipulate random variables and examples illustrate its use.
Phys
  • Rev. B 49, 12 170
  • 1994
Phys
  • Rev. B 63, 054525
  • 2001
Phys
  • Rev. B 62, 15 204
  • 2000
Phys
  • Rev. B 61, 7122
  • 2000
Sherman and C
  • Ambrosch-Draxl, Solid State Commun. 115, 669
  • 2000
Phys
  • Rev. B 59, 11 183
  • 1999
Phys
  • Rev. B 55, 97
  • 1997
Physica (Amsterdam) 282C–287C
  • 222
  • 1997
Phys
  • Rev. B 53, 876
  • 1996
...
1
2
...