Journal article
Formation of Hubbard-like bands as a fingerprint of strong electron-electron interactions in FeSe
- Abstract:
- We use angle-resolved photoemission spectroscopy (ARPES) to explore the electronic structure of single crystals of FeSe over a wide range of binding energies and study the effects of strong electron-electron correlations. We provide evidence for the existence of “Hubbard-like bands” at high binding energies consisting of incoherent many-body excitations originating from Fe 3 d states in addition to the renormalized quasiparticle bands near the Fermi level. Many high-energy features of the observed ARPES data can be accounted for when incorporating the effects of strong local Coulomb interactions in calculations of the spectral function via dynamical mean-field theory, including the formation of a Hubbard-like band. This shows that over the energy scale of several eV, local correlations arising from the on-site Coulomb repulsion and Hund's coupling are essential for a proper understanding of the electronic structure of FeSe and other related iron-based superconductors.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Version of record, pdf, 1.9MB, Terms of use)
-
- Publisher copy:
- 10.1103/PhysRevB.95.081106
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Funding agency for:
- Coldea, A
- Grant:
- Career Acceleration Fellowship (EP/I004475/1
- EP/L001772/1, EP/I004475/1, EP/I017836/1
+ Oxford
Quantum Materials Platform Grant
More from this funder
- Funding agency for:
- Haghighirad, A
- Grant:
- EP/M020517/1
- Publisher:
- American Physical Society
- Journal:
- Physical Review B More from this journal
- Volume:
- 95
- Issue:
- 8
- Article number:
- 081106(R)
- Publication date:
- 2017-02-22
- Acceptance date:
- 2017-02-01
- DOI:
- EISSN:
-
2469-9969
- ISSN:
-
2469-9950
- Pubs id:
-
pubs:684032
- UUID:
-
uuid:3361e773-52a4-4d7f-8154-7371d51fe6bd
- Local pid:
-
pubs:684032
- Source identifiers:
-
684032
- Deposit date:
-
2017-03-05
Terms of use
- Copyright holder:
- Watson et al
- Copyright date:
- 2017
- Notes:
- Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
If you are the owner of this record, you can report an update to it here: Report update to this record