Investigating the role of anion polarizability in Fe-based superconductors via light-matter interaction
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1.
California Institute of Technology
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2.
University of British Columbia
Abstract
The polarizability of nearby ions may have a significant impact on electron interactions in solids, but only limited experimental data are available to support this picture. In this work, using a highly simplified description of the prototypical FeAs superconducting layer, we show how external optical excitation of the As 4𝑝−5𝑠 splitting can lead to a significant modulation of the polarization-mediated effective interactions between carriers. Our results suggest that even perturbative external fields, approximately 2 orders of magnitude smaller than the internal field generated by charge carriers, might enable the exploration of the role of the anion's polarizability in determining the correlated physics, although more detailed modeling is needed to decide the optimal ways to achieve this.
Copyright and License
©2024 American Physical Society
Acknowledgement
We thank G. Sawatzky, A. Damascelli, and M. Mitrano for insightful discussions. We acknowledge support from the Natural Sciences and Engineering Research Council of
Canada, the Stewart Blusson Quantum Matter Institute, and the Max-Planck-UBC-UTokyo Center for Quantum Materials. We also acknowledge support from the Fonds de recherche du Québec - Nature et Technologie (FRQNT) and the Ministère de l’Économie, de l’Innovation et de l’Énergie - Québec.
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Additional details
- ISSN
- 2469-9969
- Natural Sciences and Engineering Research Council
- University of British Columbia
- Fonds de Recherche du Québec – Nature et Technologies
- Ministère de l'Économie, de l'Innovation et de l'Énergie
- Accepted
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2024-08-13Accepted
- Available
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2024-08-27Published online
- Caltech groups
- Institute for Quantum Information and Matter
- Publication Status
- Published