Enhanced pairing mechanism in Cuprate-type crystals

Abstract

Using a BCS mean-field approach, we show how the interplay between low-momentum optical phonons and Jahn-Teller-type lattice distortions can open an attractive channel that allows the formation of pairs with the corresponding density exhibiting characteristic features of a pair-density wave (PDW). We demonstrate this numerically on a copper-oxide type lattice.

arXiv comment13 pages, 15 figures. v2. Extended results. To appear in Physical Review B

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