Charge order driven by Fermi-arc instability and its connection with pseudogap in cuprate superconductors. Issue 12 (22nd April 2016)

• Record Type: Journal Article
• Authors: Feng, Shiping; Gao, Deheng; Zhao, Huaisong
• Is Part Of: Philosophical magazine. Volume 96:Issue 12(2016)
• Page Start: 1245
• Page End: 1262
• Publication Date: 2016-04-22
• Subjects: Charge order -- Fermi arc -- pseudogap -- hot spot -- electron Fermi surface -- cuprate superconductors; Condensed matter -- Periodicals; Physics -- Periodicals; Matière condensée -- Périodiques; Physique -- Périodiques; 530.41
• DOI: 10.1080/14786435.2016.1161858
• Languages: English
• ISSNs: 1478-6435

Abstract

Abstract : The recently discovered charge order is a generic feature of cuprate superconductors, however, its microscopic origin remains debated. Within the framework of the fermion-spin theory, the nature of charge order in the pseudogap phase and its evolution with doping are studied by taking into account the electron self-energy (then the pseudogap) effect. It is shown that the antinodal region of the electron Fermi surface is suppressed by the electron self-energy, and then the low-energy electron excitations occupy the disconnected Fermi arcs located around the nodal region. In particular, the charge order state is driven by the Fermi-arc instability, with a characteristic wave vector corresponding to the hot spots of the Fermi arcs rather than the antinodal nesting vector. Moreover, although the Fermi arc increases its length as a function of doping, the charge order wave vector reduces almost linearity with the increase of doping. The theory also indicates that the Fermi arc, charge order and pseudogap in cuprate superconductors are intimately related to each other, and all of them emanates from the electron self-energy due to the interaction between electrons by the exchange of spin excitations.