Skip to main content

Phase-sensitive determination of nodal d-wave order parameter in single-band and multiband superconductors

Cornell Affiliated Author(s)

Author

J. Böker
M.A. Sulangi
A. Akbari
J.C.S. Davis
P.J. Hirschfeld
I.M. Eremin

Abstract

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 limit and at intermediate-scattering strength shows characteristic features for sign-changing and sign-preserving scattering wave vectors, 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 Bi2Sr2CaCu2O8+δ, which should allow the comparison of our theory with experimental data. © 2020 American Physical Society.

Date Published

Journal

Physical Review B

Volume

101

Issue

21

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086990233&doi=10.1103%2fPhysRevB.101.214505&partnerID=40&md5=41bc1df9b55d23227add8ba85556622d

DOI

10.1103/PhysRevB.101.214505

Group (Lab)

J.C. Seamus Davis Group

Download citation