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29 March 2024
 
  » arxiv » arxiv.0706.4282

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Two Gaps Make a High Temperature Superconductor
S. Huefner ; M.A. Hossain ; A. Damascelli ; G.A. Sawatzky ;
Rating Visitors: 3/5 (1 visitor)
Date 28 Jun 2007
AbstractIn challenging the mystery of high-temperature superconductivity, the key is the identification of the energy scales associated with the onset of a coherent condensate of superconducting quasiparticles, or Cooper pairs. This might in particular provide a measure of the pairing strength and of the coherence of the condensate, and ultimately reveal the nature of the elusive pairing mechanism. An analysis of a large body of experimental data shows that in the cuprates there are two fundamental energy scales coexisting over the whole superconducting dome. These are the pseudogap and the superconducting gap, which reflect the pairing strength and superconducting condensation energy, respectively. It is suggested that the latter is probed also by the magnetic neutron resonance, which measures a characteristic collective excitation of the condensate.
Source arXiv, arxiv.0706.4282
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