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

Figure 2

The contour/3D plots of the Fermi energy DOS on the Brillouin zone (BZ) at 10% hole doping, |𝑡^′/𝑡|=0.4 (except (e)) and 𝐵=0. (a) The anisotropy parameter 𝜀́=0 and the level broadening factor 𝛾=0.0357eV. (b) 𝜀́=0 and 𝛾=0.2436eV. (c) 𝜀́=0.05 and 𝛾=0.0357eV. (d) 𝜀́=0.05 and 𝛾=0.2436eV. (e) 𝜀́=0.05,𝛾=0.0357eV, and |𝑡^′/𝑡|=0.5. The scale of the plots in Figures 2(a), 2(c) and 2(e) is from −0.2 to 1.2. In the weak disorder regime we obtain prominent electron pockets and barely visible hole-like patches. In the strong disorder regime the scenario does not change radically. We have assumed Σ_𝑒=0.05eV above.The comparison of figures 2(a) with 2(c) (and figures 2(b) with 2(d)) indicates the slight change (Pomeranchuk distortion) in the topology of the Fermi surface due to 𝜀́≠0; electron pockets around (0,±𝜋) widen slightly compared to those around (±𝜋,0). (e) The figure indicates that the higher value of the ratio |𝑡^′/𝑡| may lead to the disappearance of the electron pockets.

(a)

(b)

(c)

(d)

(e)