Tunneling spectra of layered strongly correlated d-wave superconductors

Abstract

Tunneling conductance experiments on cuprate superconductors exhibit a large diversity of spectra that appear in different nano-sized regions of inhomogeneous samples. In this letter, we use a mean-field approach to the tt't''J model in order to address the features in these spectra that deviate from the BCS paradigm, namely, the bias sign asymmetry at high bias, the generic lack of evidence for the Van Hove singularity, and the occasional absence of coherence peaks. We conclude that these features can be reproduced in homogeneous layered d-wave superconductors solely due to a proximate Mott insulating transition. We also establish the connection between the above tunneling spectral features and the strong renormalization of the electron dispersion around (0,pi) and (pi,0) and the momentum space anisotropy of electronic states observed in ARPES experiments.

4 pages, 3 figures. Added comment on the role of sample inhomogeneity. Published version. Homepage http://dao.mit.edu/~wen/

References in corpus (12)

• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Imaging Quasiparticle Interference in Bi2Sr2CaCu2O8+d
• Hot Spots and Pseudogaps for Hole- and Electron-Doped High-Temperature Superconductors
• BCS-like Bogoliubov Quasiparticles in High-Tc Superconductors Observed by Angle-Resolved Photoemission Spectroscopy
• The Dichotomy between Nodal and Antinodal Quasiparticles in Underdoped (La${}_{2-x}$Sr${}_x$)CuO${}_4$ Superconductors
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t'-t''-J model
• Inhomogeneity Induces Resonance Coherence Peaks in Superconducting BSCCO
• Evolution of a Metal to Insulator Transition in Ca${}_{2-x}$Na${}_x$CuO${}_2$Cl${}_2$, as seen by ARPES
• Particle-Hole Asymmetry in Doped Mott Insulators: Implications for Tunneling and Photoemission Spectroscopies
• Imaging nano-scale electronic inhomogeneity in lightly doped Mott insulator Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• New mean field theory of the tt't''J model applied to the high-Tc superconductors
• Possible Z2 phase and spin-charge separation in electron doped cuprate superconductors

Cited by in corpus (9)

• Self-consistent slave rotor mean field theory for strongly correlated systems
• Luttinger-volume violating Fermi liquid in the pseudogap phase of the cuprate superconductors
• Doped carrier formulation and mean-field theory of the tt't''J model
• Spectral Weights, d-wave Pairing Amplitudes, and Particle-hole Tunneling Asymmetry of a Strongly Correlated Superconductor
• The Electronic States of Two Oppositely doped Mott Insulators Bilayers
• Pressure Driven Phase Transition in 1T-TiSe${}_2$ , a MOIPT+DMFT Study
• Observation of two Andreev-like energy scales in $L{a}_{2-x}S{r}_{x}Cu{O}_4$ superconductor/normal-metal/superconductor junctions
• Electromagnetic response of high-Tc superconductors -- the slave-boson and doped-carrier theories
• The short-range correlations of a doped Mott insulator