English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Multi-atom quasiparticle scattering interference for superconductor energy-gap symmetry determination

Sharma, R., Kreisel, A., Sulangi, M. A., Böker, J., Kostin, A., Allan, M. P., et al. (2021). Multi-atom quasiparticle scattering interference for superconductor energy-gap symmetry determination. npj Quantum Materials, 6: 7, pp. 1-7. doi:10.1038/s41535-020-00303-4.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Sharma, Rahul1, Author
Kreisel, Andreas1, Author
Sulangi, Miguel Antonio1, Author
Böker, Jakob1, Author
Kostin, Andrey1, Author
Allan, Milan P.1, Author
Eisaki, H.1, Author
Böhmer, Anna E.1, Author
Canfield, Paul C.1, Author
Eremin, Ilya1, Author
Davis, J. C. Séamus2, Author           
Hirschfeld, P. J.1, Author
Sprau, Peter O.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2J. C. Séamus Davis, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_3266851              

Content

show
hide
Free keywords: -
 Abstract: Complete theoretical understanding of the most complex superconductors requires a detailed knowledge of the symmetry of the superconducting energy-gap Δkα, for all momenta k on the Fermi surface of every band α. While there are a variety of techniques for determining ∣Δkα∣, no general method existed to measure the signed values of Δkα. Recently, however, a technique based on phase-resolved visualization of superconducting quasiparticle interference (QPI) patterns, centered on a single non-magnetic impurity atom, was introduced. In principle, energy-resolved and phase-resolved Fourier analysis of these images identifies wavevectors connecting all k-space regions where Δkα has the same or opposite sign. But use of a single isolated impurity atom, from whose precise location the spatial phase of the scattering interference pattern must be measured, is technically difficult. Here we introduce a generalization of this approach for use with multiple impurity atoms, and demonstrate its validity by comparing the Δkα it generates to the Δkα determined from single-atom scattering in FeSe where s± energy-gap symmetry is established. Finally, to exemplify utility, we use the multi-atom technique on LiFeAs and find scattering interference between the hole-like and electron-like pockets as predicted for Δkα of opposite sign. © 2021, Crown.

Details

show
hide
Language(s): eng - English
 Dates: 2021-01-112021-01-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/s41535-020-00303-4
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: npj Quantum Materials
  Other : npj Quantum Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: [London] : Nature Publishing Group
Pages: - Volume / Issue: 6 Sequence Number: 7 Start / End Page: 1 - 7 Identifier: ISSN: 2397-4648
CoNE: https://pure.mpg.de/cone/journals/resource/2397-4648