Electron pockets and pseudogap asymmetry observed in the thermopower of underdoped cuprates

2013/05/01 by James Storey, J. G. Storey, J. L. Tallon +1
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.supr-con

paper · pdf · doi:10.1209/0295-5075/102/37006

published as EPL 102, 37006 (2013) · 6 pages, 7 figures, accepted for publication in EPL

openalex publication_date 2013/05/01 · arxiv created 2013/05/08 · arxiv updated 2013/05/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We calculate the diffusion thermoelectric power of high-Tc cuprates using the resonating-valence-bond spin-liquid model developed by Yang, Rice and Zhang (YRZ). In this model, reconstruction of the energy-momentum dispersion results in a pseudogap in the density of states that is heavily asymmetric about the Fermi level. The subsequent asymmetry in the spectral conductivity is found to account for the large magnitude and temperature dependence of the thermopower observed in underdoped cuprates. In addition we find evidence in experimental data for electron pockets in the Fermi surface, arising from a YRZ-like reconstruction, near the onset of the pseudogap in the slightly overdoped regime.

Citations

• Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates
• Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
• In-plane anisotropy on the transport properties in the modulated Bi2O2-based conductors Bi-2212 and Bi–Sr–Co–O
• Electron pockets in the Fermi surface of hole-doped high-Tc superconductors