S and D Wave Mixing in High $T_c$ Superconductors

Abstract

For a tight binding model with nearest neighbour attraction and a small orthorhombic distortion, we find a phase diagram for the gap at zero temperature which includes three distinct regions as a function of filling. In the first, the gap is a mixture of mainly $d$-wave with a smaller extended $s$-wave part. This is followed by a region in which there is a rapid increase in the $s$-wave part accompanied by a rapid increase in relative phase between $s$ and $d$ from 0 to $\pi$. Finally, there is a region of dominant $s$ with a mixture of $d$ and zero phase. In the mixed region with a finite phase, the $s$-wave part of the gap can show a sudden increase with decreasing temperature accompanied with a rapid increase in phase which shows many of the characteristics measured in the angular resolved photoemission experiments of Ma {\em et al.} in $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_8$

12 pages, RevTeX 3.0, 3 PostScript figures uuencoded and compressed

Cited by in corpus (22)

• Electrodynamics of the Nodal Metal in Weakly Doped High-$T_c$ Cuprates
• Transport and optics at the node in a nodal loop semimetal
• Signatures of Fermi surface reconstruction in Raman spectra of underdoped cuprates
• Effect of pseudogap formation on the penetration depth of underdoped high $T_c$ cuprates
• Material-specific gap function in the high-temperature superconductors
• Microwave conductivity in the ferropnictides with specific application to Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Specific heat across the superconducting dome in the cuprates
• Two phase transitions in $(d_{x^2-y^2}+is)$-wave superconductors
• Floquet engineering spin triplet states in unconventional magnets
• Determination of boson spectrum from optical data in pseudogap phase of underdoped cuprates
• Optical Self Energy in Graphene due to Correlations
• Optical properties of the pseudogap state in underdoped cuprates
• Mixing of superconducting $d_{x^2-y^2}$ state with s-wave states for different filling and temperature
• Superconductivity in the Extended Hubbard Model with More Than Nearest-Neighbour Contributions
• Two phase transitions in (s+id)-wave Bardeen-Cooper-Schrieffer superconductivity
• Optical response in Weyl semimetal in model with gapped Dirac phase
• Electron-boson spectral density of LiFeAs obtained from optical data
• Distinguishing Coulomb and electron-phonon interactions for massless Dirac fermions
• Optical Properties of Bogoliubov Quasiparticles
• Stability of Mixed-Symmetry Superconducting States with Broken Time-Reversal Symmetry against Lattice Distortions
• Isotope Effect of Underdoped Cuprates in the Yang-Rice-Zhang Model
• Electronic structure in underdoped cuprates due to the emergence of a pseudogap