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

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.

6 pages, 7 figures, accepted for publication in EPL

References in corpus (14)

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Cited by in corpus (10)

• Fermi Surface and Pseudogap Evolution in a Cuprate Superconductor
• Hall effect and Fermi surface reconstruction via electron pockets in the high-$T_c$ cuprates
• Seebeck coefficient in a cuprate superconductor: particle-hole asymmetry in the strange metal phase and Fermi surface transformation in the pseudogap phase
• Phenomenological theories of the low-temperature pseudogap: Hall number, specific heat and Seebeck coefficient
• Hall and Seebeck coefficients from bi-directional charge density wave state in high-$T_c$ cuprates
• Signatures of a momentum independent pseudogap in the electronic density of states and Raman spectroscopy of the underdoped cuprates
• Simultaneous drop in mean free path and carrier density at the pseudogap onset in high-$T_c$ cuprates
• Unified approach to electrical and thermal transport in high-$T_c$ superconductors
• Fermi arcs vs hole pockets: periodization of a cellular two-band model
• Normal state Nernst effect from bi-directional bond density wave state in high T_c cuprates