Roles of zeros of the Green function in Fermi arc and non-Fermi liquid in the two-dimensional Hubbard model

Shiro Sakai, Yukitoshi Motome, Masatoshi Imada

研究成果: Article

7 引用 (Scopus)

抄録

We clarify effects of zeros of the Green function on a Fermi arc and on a non-Fermi liquid behavior in the two-dimensional Hubbard model by means of the cellular dynamical mean-field theory (CDMFT). We study in detail the state with a hole-pocket Fermi surface and zeros of the Green function, which was found for a slightly doped Mott insulator in an earlier CDMFT calculation [T.D. Stanescu, G. Kotliar, Phys. Rev. B 74 (2006) 125110; T.D. Stanescu, M. Civelli, K. Haule, G. Kotliar, Ann. Phys. (N.Y.) 321 (2006) 1682]. As thermal or other extrinsic scatterings of electrons broaden the zeros, regions around the zero surface gain an imaginary part of the self-energy, which strongly suppresses the spectral intensity, especially on the closer side of the hole pocket to the zero surface. Then the rest emerges as a Fermi arc. Quasiparticle weight becomes ill defined on the closer side of the Fermi pocket while it is well defined on the opposite side, which means that a differentiation of electrons occurs in the momentum space, indicating an emergence of a non-Fermi liquid phase.

元の言語English
ページ(範囲)3183-3186
ページ数4
ジャーナルPhysica B: Condensed Matter
404
発行部数19
DOI
出版物ステータスPublished - 2009 10 15
外部発表Yes

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Hubbard model
Mean field theory
two dimensional models
Green's function
Green's functions
arcs
Fermi surface
Electrons
Liquids
liquids
Momentum
Scattering
Fermi surfaces
liquid phases
electrons
insulators
momentum
scattering
energy
Hot Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

これを引用

Roles of zeros of the Green function in Fermi arc and non-Fermi liquid in the two-dimensional Hubbard model. / Sakai, Shiro; Motome, Yukitoshi; Imada, Masatoshi.

:: Physica B: Condensed Matter, 巻 404, 番号 19, 15.10.2009, p. 3183-3186.

研究成果: Article

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