Frustrated spin order and stripe fluctuations in FeSe
| Autor: | Baum, Andreas, Ruiz, Harrison N., Lazarević, Nenad, Wang, Yao, Böhm, Thomas, Ahangharnejhad, Ramez Hosseinian, Adelmann, Peter, Wolf, Thomas, Popović, Zoran V., Moritz, Brian, Devereaux, Thomas P., Hackl, Rudi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Commun. Phys. 2, 14 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s42005-019-0107-y |
| Popis: | The charge and spin dynamics of the structurally simplest iron-based superconductor, FeSe, may hold the key to understanding the physics of high temperature superconductors in general. Unlike the iron pnictides, FeSe lacks long range magnetic order in spite of a similar structural transition around 90\,K. Here, we report results of Raman scattering experiments as a function of temperature and polarization and simulations based on exact diagonalization of a frustrated spin model. Both experiment and theory find a persistent low energy peak close to 500cm$^{-1}$ in $B_{1g}$ symmetry, which softens slightly around 100\,K, that we assign to spin excitations. By comparing with results from neutron scattering, this study provides evidence for nearly frustrated stripe order in FeSe. Comment: 12 pages, 12 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|