Electromagnetic response of high-Tcsuperconductors: Slave-boson and doped-carrier theories

2007/05/16 by Tiago C. Ribeiro, Xiao-Gang Wen
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.77.144526

12 pages, RevTeX4, homepage http://dao.mit.edu/~wen

arxiv created 2007/05/16 · openalex publication_date 2008/04/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We evaluate the doping dependence of the quasiparticle current and low-temperature superfluid density in two slave-particle theories of the tt^\ensuremath't^\ensuremath''J model---the slave-boson theory and doped-carrier theory. In the slave-boson theory, the nodal quasiparticle current renormalization factor \ensuremathα proportionally vanishes to the zero temperature superfluid density \ensuremathρ_S(0); however, we find that away from the \ensuremathρ_S(0)\ensuremath→0 limit, \ensuremathα displays a much weaker doping dependence than \ensuremathρ_S(0). A similar conclusion applies to the doped-carrier theory, which differentiates the nodal and antinodal regions of momentum space. Due to its momentum space anisotropy, the doped-carrier theory enhances the value of \ensuremathα in the hole doped regime, bringing it to quantitative agreement with experiments, and reproduces the asymmetry between hole and electron doped cuprate superconductors. Finally, we use the doped-carrier theory to predict a specific experimental signature of local staggered spin correlations in doped Mott insulator superconductors, which, we propose, should be observed in scanning tunneling microscopy measurements of underdoped high-T_c compounds. This experimental signature distinguishes the doped-carrier theory from other candidate mean-field theories of high-T_c superconductors, such as the slave-boson theory and the conventional BCS theory.

Citations

• Inherent inhomogeneities in tunneling spectra ofBi2Sr2CaCu2O8−xcrystals in the superconducting state
• Spin correlations in the algebraic spin liquid: Implications for high-Tcsuperconductors
• Competing orders in a magnetic field: Spin and charge order in the cuprate superconductors
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t′-t″-J model
• Theory of Underdoped Cuprates
• Correlation between Superfluid Density andTCof UnderdopedYBa2Cu3O6+xNear the Superconductor-Insulator Transition
• Unusual Superconducting State of Underdoped Cuprates
• Effective Theory of High-Temperature Superconductors
• 4D-XY quantum criticality in a doped Mott insulator
• Dynamical Breakup of the Fermi Surface in a Doped Mott Insulator
• Destruction of the Fermi surface in underdoped high-Tc superconductors
• The pseudogap in high-temperature superconductors: an experimental survey
• Competing orders and the doping and momentum dependent quasiparticle excitations in cuprate superconductors