Hidden Fermionic Excitation Boosting High-Temperature Superconductivity in Cuprates

Shiro Sakai, Marcello Civelli, Masatoshi Imada

研究成果: Article査読

34 被引用数 (Scopus)

抄録

The dynamics of a microscopic cuprate model, namely, the two-dimensional Hubbard model, is studied with a cluster extension of the dynamical mean-field theory. We find a nontrivial structure of the frequency-dependent self-energies, which describes an unprecedented interplay between the pseudogap and superconductivity. We show that these properties are well described by quasiparticles hybridizing with (hidden) fermionic excitations, emergent from the strong electronic correlations. The hidden fermion enhances superconductivity via a mechanism distinct from a conventional boson-mediated pairing, and originates the normal-state pseudogap. Though the hidden fermion is elusive in experiments, it can solve many experimental puzzles.

本文言語English
論文番号057003
ジャーナルPhysical Review Letters
116
5
DOI
出版ステータスPublished - 2016 2 5
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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