Composite-Fermion theory for pseudogap, Fermi arc, hole pocket, and non-Fermi liquid of underdoped cuprate superconductors

Youhei Yamaji, Masatoshi Imada

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We propose that an extension of the exciton concept to doped Mott insulators offers a fruitful insight into challenging issues of the copper oxide superconductors. In our extension, new fermionic excitations called cofermions emerge in conjunction to generalized excitons. The cofermions hybridize with conventional quasiparticles. Then a hybridization gap opens, and is identified as the pseudogap observed in the underdoped cuprates. The resultant Fermi-surface reconstruction naturally explains a number of unusual properties of the underdoped cuprates, such as the Fermi arc and/or pocket formation.

Original languageEnglish
Article number016404
JournalPhysical Review Letters
Volume106
Issue number1
DOIs
Publication statusPublished - 2011 Jan 17
Externally publishedYes

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cuprates
arcs
fermions
excitons
conjunction
composite materials
copper oxides
liquids
Fermi surfaces
insulators
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Composite-Fermion theory for pseudogap, Fermi arc, hole pocket, and non-Fermi liquid of underdoped cuprate superconductors. / Yamaji, Youhei; Imada, Masatoshi.

In: Physical Review Letters, Vol. 106, No. 1, 016404, 17.01.2011.

Research output: Contribution to journalArticle

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