Investigation of a CDDW Hamiltonian to Explore Possibility of Magneto-Quantum Oscillations in Electronic Specific Heat of Hole-Doped Cuprates

Abstract EN

We investigate a chiral d-density wave (CDDW) mean field model Hamiltonian in the momentum space suitable for the hole-doped cuprates, such as YBCO, in the pseudogap phase to obtain the Fermi surface (FS) topologies, including the anisotropy parameter(έ) and the elastic scattering by disorder potential (|v0|).

For έ=0, with the chemical potential μ=−0.27 eV for 10% doping level and |v0|≥|t| (where |t|=0.25 eV is the first neighbor hopping), at zero/non-zero magnetic field (B), the FS on the first Brillouin zone is found to correspond to electron pockets around antinodal regions and barely visible patches around nodal regions.

For έ≠0, we find Pomeranchuk distortion of FS.

We next relate our findings regarding FS to the magneto-quantum oscillations in the electronic specific heat.

Since the nodal quasiparticle energy values for B=0 are found to be greater than μ for |v0|≥|t|, the origin of the oscillations for nonzero B corresponds to the Fermi pockets around antinodal regions.

The oscillations are shown to take place in the weak disorder regime (|v0|=0.25 eV) only.