Strong particle-hole asymmetry of charge instabilities in doped Mott insulators

Abstract

We study possible charge instabilities in doped Mott insulators by employing the two-dimensional t-J model with a positive value of the next nearest-neighbor hopping integral t' on a square lattice, which is applicable to electron-doped cuprates. Although the d-wave charge density wave (flux phase) and d-wave Pomeranchuk instability (nematic order) are dominant instabilities for a negative t' that corresponds to hole-doped cuprates, we find that those instabilities are strongly suppressed and become relevant only rather close to half filling. Instead, various types of bond orders with modulation vectors close to (pi,pi) are dominant in a moderate doping region. Phase separation is also enhanced, but it can be suppressed substantially by the nearest-neighbor Coulomb repulsion without affecting the aforementioned charge instabilities.

16 pages, 7 figures

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Cited by in corpus (14)

• Plasmon excitations in layered high-Tc cuprates
• Dual structure in the charge excitation spectrum of electron-doped cuprates
• $d$-wave bond-order charge excitations in electron-doped cuprates
• Charge-Density-Excitation Spectrum in the t-t'-J-V Model
• Theoretical insights into electronic nematic order, bond-charge orders, and plasmons in cuprate superconductors
• Electron self-energy from quantum charge fluctuations in the layered t-J model with long-range Coulomb interaction
• Doping dependence of d-wave bond-charge excitations in electron-doped cuprates
• Superconductivity with and without glue and the role of the double-occupancy forbidding constraint in the t-J-V model
• Ring-like shaped charge modulations in the t-J model with long-range Coulomb interaction
• Phase Diagram of the Square-Lattice $t$-$J$-$V$ Model for Electron-Doped Cuprates
• Plasmarons in high-temperature cuprate superconductors
• Strong-coupling theory of bilayer plasmon excitations
• Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors
• Theoretical perspectives on charge dynamics in high-temperature cuprate superconductors