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| In this paper, a model of electron pairing is presented based on a nonstationary interpretation of electron-lattice interactions. From a nonstationary view, electron-lattice system has an intrinsic time dependent characteristics as featured by Golden Rule. The primary essence of Golden Rule is resonance, by which electrons on matched pairing states are tuned to the lattice wave modes. If an electron pair is tuned with a sufficiently good quality factor, the threshold phonon of the pair can become redundant and can be released from the pair to produce a binding energy. Lattice modes falling in a common linewidth can compete with one another, much like modes competing in a lasing system. In cuprates, due to near-parallel band splitting features at or near Fermi Surface (EF), a great number of electron pairs are tuned to a relatively small number of lattice wave modes, leading to strong and effective mode competition and phonon transfer from EF towards the "kink", which results in phonon depletion at and near EF. This depletion should be responsible for enhanced superconducting critical temperature (Tc) of cuprates. Also discussed are the competition among multiple pairings associated with a common electron state and some effects of such competition on superconductivity.
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| Keywords:electron pairing;phonon depletion at Fermi Surface;high temperature superconductivity |
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