Longitudinal conductivity and Hall coefficient in two-dimensional metals with spiral magnetic order
| Autor: | Johannes Mitscherling, Walter Metzner |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Superconductivity Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Magnetic order Condensed Matter - Superconductivity Relaxation (NMR) FOS: Physical sciences Conductivity 01 natural sciences 010305 fluids & plasmas Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons Planar Hall effect Condensed Matter::Superconductivity 0103 physical sciences Cuprate Condensed Matter::Strongly Correlated Electrons 010306 general physics Spiral |
| DOI: | 10.48550/arxiv.1807.10252 |
| Popis: | We compute the longitudinal dc conductivity and the Hall conductivity in a two-dimensional metal with spiral magnetic order. Scattering processes are modeled by a momentum-independent relaxation rate $\Gamma$. We derive expressions for the conductivities, which are valid for arbitrary values of $\Gamma$. Both intraband and interband contributions are fully taken into account. For small $\Gamma$, the ratio of interband and intraband contributions is of order $\Gamma^2$. In the limit $\Gamma \to 0$, the conductivity formulas assume a simple quasiparticle form, as derived by Voruganti et. al. [Phys. Rev. B 45, 13945 (1992)]. Using the complete expressions, we can show that relaxation rates in the regime of recent transport experiments for cuprate superconductors in high magnetic fields are sufficiently small to justify the application of these simplified formulas. The longitudinal conductivity exhibits a pronounced nematicity in the spiral state. The drop of the Hall number as a function of doping observed recently in several cuprate compounds can be described with a suitable phenomenological ansatz for the magnetic order parameter. |
| Databáze: | OpenAIRE |
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