Phase-sensitive determination of nodal $\mathbf{d}$-wave order parameter in single-band and multiband superconductors
| Autor: | Böker, Jakob, Sulangi, Miguel Antonio, Akbari, Alireza, Davis, J. C. Séamus, Hirschfeld, P. J., Eremin, Ilya M. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 101, 214505 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.101.214505 |
| Popis: | Determining the exact pairing symmetry of the superconducting order parameter in candidate unconventional superconductors remains an important challenge. Recently a new method, based on phase sensitive quasiparticle interference measurements, was developed to identify gap sign changes in isotropic multiband systems. Here we extend this approach to the single-band and multiband nodal $d$-wave superconducting cases relevant, respectively, for the cuprates and likely for the infinite-layer nickelate superconductors. Combining analytical and numerical calculations, we show that the antisymmetrized correction to the tunneling density of states due to nonmagnetic impurities in the Born and intermediate-scattering limits shows characteristic features for sign-changing and sign-preserving scattering wavevectors, as well as for the momentum-integrated quantity. Furthermore, using a realistic approach accounting for the Wannier orbitals, we model scanning tunneling microscopy data of $\text{Bi}_2\text{Sr}_2\text{CaCu}_2\text{O}_{8+\delta}$, which should allow the comparison of our theory with experimental data. Comment: 12 pages, 12 figures |
| Databáze: | arXiv |
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