Non-local d\(_{xy}\) nematicity and the missing electron pocket in FeSe
- The origin of spontaneous electronic nematic ordering provides important information for understanding iron-based superconductors. Here, we analyze a scenario where the d\(_{xy}\) orbital strongly contributes to nematic ordering in FeSe. We show that the addition of d\(_{xy}\) nematicity to a pure d\(_{xz}\)/d\(_{yz}\) order provides a natural explanation for the unusual Fermi surface and correctly reproduces the strongly anisotropic momentum dependence of the superconducting gap. We predict a Lifshitz transition of an electron pocket mediated by temperature and sulfur doping, whose signatures we discuss by analysing available experimental data. We present the variation of momentum dependence of the superconducting gap upon suppression of nematicity. Our quantitatively accurate model yields the transition from tetragonal to nematic FeSe and the FeSe\(_{1-x}\)S\(_{x}\) series, and puts strong constraints on possible nematic mechanisms.
| Author: | Luke C. RhodesORCiDGND, Jakob BökerGND, Marvin Alexander MüllerGND, Matthias EschrigORCiDGND, Ilya EreminORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-91746 |
| DOI: | https://doi.org/10.1038/s41535-021-00341-6 |
| Parent Title (English): | npj quantum materials |
| Publisher: | Springer Nature |
| Place of publication: | Berlin |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2022/07/29 |
| Date of first Publication: | 2021/05/12 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | Open Access Fonds |
| Volume: | 6 |
| Issue: | Artikel 45 |
| First Page: | 45-1 |
| Last Page: | 45-14 |
| Note: | Article Processing Charge funded by the Open Access Publication Fund of Ruhr-Universität Bochum. |
| Institutes/Facilities: | Institut für Theoretische Physik III, Theoretische Festkörperphysik |
| Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Physik |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Physik und Astronomie |
| Licence (English): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
