Charge carrier drop at the onset of pseudogap behavior in the two-dimensional Hubbard model
| Autor: | Walter Metzner, Pietro Maria Bonetti, Demetrio Vilardi, Johannes Mitscherling |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Hubbard model Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Superconductivity FOS: Physical sciences Fermi surface 02 engineering and technology Electron 021001 nanoscience & nanotechnology 01 natural sciences Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons Condensed Matter::Superconductivity 0103 physical sciences Antiferromagnetism Wave vector Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Pseudogap Electronic band structure |
| Popis: | We show that antiferromagnetic spin-density wave order in the two-dimensional Hubbard model yields a drop of the charge carrier density as observed in recent transport measurements for cuprate superconductors in high magnetic fields on entering the pseudogap regime. The amplitude and the (generally incommensurate) wave vector of the spin-density wave is obtained from dynamical mean-field theory (DMFT). An extrapolation of the finite temperature results to zero temperature yields an approximately linear doping dependence of the magnetic gap $\mathrm{\ensuremath{\Delta}}(p)\ensuremath{\propto}{p}^{*}\ensuremath{-}p$ in a broad doping range below the critical doping ${p}^{*}$. The magnetic order leads to a Fermi surface reconstruction with electron and hole pockets, where electron pockets exist only in a restricted doping range below ${p}^{*}$. The dc charge transport properties are computed by combining the renormalized band structure as obtained from the DMFT with a doping-independent phenomenological scattering rate. A pronounced drop of the longitudinal conductivity and the Hall number in a narrow doping range below ${p}^{*}$ is obtained. |
| Databáze: | OpenAIRE |
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