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Article Dans Une Revue Physical Review Letters Année : 2002

Evidence for two distinct energy scales in the Raman spectra of YBa2(CuNi)O6.95

Résumé

We report low energy electronic Raman scattering from Ni-substituted YBa2Cu3O6.95 single crystals with Tc ranging from 92.5 K to 78 K. The fully symmetrical A1g channel and the B1g channel which is sensitive to the dx2-y2 gap maximum have been explored. The energy of the B1g pair-breaking peak remains constant under Ni doping while the energy of the A1g peak scales with Tc (EA1g/Tc=5). Our data show that the A1g peak tracks the magnetic resonance peak observed in inelastic neutron scattering yielding a key explanation to the long-standing problem of the origin the A1g peak.

Dates et versions

hal-00016693 , version 1 (09-01-2006)

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Citer

Y. Gallais, A. Sacuto, P. Bourges, Yvan Sidis, A. Forget, et al.. Evidence for two distinct energy scales in the Raman spectra of YBa2(CuNi)O6.95. Physical Review Letters, 2002, 88, pp.177401. ⟨hal-00016693⟩
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