Nematic Energy Scale and the Missing Electron Pocket in FeSe
Abstract
Superconductivity emerges in proximity to a nematic phase in most iron-based superconductors. It is therefore important to understand the impact of nematicity on the electronic structure. Orbital assignment and tracking across the nematic phase transition prove to be challenging due to the multiband nature of iron-based superconductors and twinning effects. Here, we report a detailed study of the electronic structure of fully detwinned FeSe across the nematic phase transition using angle-resolved photoemission spectroscopy. We clearly observe a nematicity-driven band reconstruction involving dxz, dyz, and dxy orbitals. The nematic energy scale between dxz and dyz bands reaches a maximum of 50 meV at the Brillouin zone corner. We are also able to track the dxz electron pocket across the nematic transition and explain its absence in the nematic state. Our comprehensive data of the electronic structure provide an accurate basis for theoretical models of the superconducting pairing in FeSe.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1577398
- Alternate Identifier(s):
- OSTI ID: 1594515; OSTI ID: 1603558
- Grant/Contract Number:
- AC02-05CH11231; SC0018197; AC02-76SF00515; 11374361; 11674392; PF 947/1-1; C-2024; C-1411; 2016YFA0300504
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Name: Physical Review. X Journal Volume: 9 Journal Issue: 4; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Yi, M., Pfau, H., Zhang, Y., He, Y., Wu, H., Chen, T., Ye, Z. R., Hashimoto, M., Yu, R., Si, Q., Lee, D. -H., Dai, Pengcheng, Shen, Z. -X., Lu, D. H., and Birgeneau, R. J. Nematic Energy Scale and the Missing Electron Pocket in FeSe. United States: N. p., 2019.
Web. doi:10.1103/PhysRevX.9.041049.
Yi, M., Pfau, H., Zhang, Y., He, Y., Wu, H., Chen, T., Ye, Z. R., Hashimoto, M., Yu, R., Si, Q., Lee, D. -H., Dai, Pengcheng, Shen, Z. -X., Lu, D. H., & Birgeneau, R. J. Nematic Energy Scale and the Missing Electron Pocket in FeSe. United States. doi:https://doi.org/10.1103/PhysRevX.9.041049
Yi, M., Pfau, H., Zhang, Y., He, Y., Wu, H., Chen, T., Ye, Z. R., Hashimoto, M., Yu, R., Si, Q., Lee, D. -H., Dai, Pengcheng, Shen, Z. -X., Lu, D. H., and Birgeneau, R. J. Fri .
"Nematic Energy Scale and the Missing Electron Pocket in FeSe". United States. doi:https://doi.org/10.1103/PhysRevX.9.041049.
@article{osti_1577398,
title = {Nematic Energy Scale and the Missing Electron Pocket in FeSe},
author = {Yi, M. and Pfau, H. and Zhang, Y. and He, Y. and Wu, H. and Chen, T. and Ye, Z. R. and Hashimoto, M. and Yu, R. and Si, Q. and Lee, D. -H. and Dai, Pengcheng and Shen, Z. -X. and Lu, D. H. and Birgeneau, R. J.},
abstractNote = {Superconductivity emerges in proximity to a nematic phase in most iron-based superconductors. It is therefore important to understand the impact of nematicity on the electronic structure. Orbital assignment and tracking across the nematic phase transition prove to be challenging due to the multiband nature of iron-based superconductors and twinning effects. Here, we report a detailed study of the electronic structure of fully detwinned FeSe across the nematic phase transition using angle-resolved photoemission spectroscopy. We clearly observe a nematicity-driven band reconstruction involving dxz, dyz, and dxy orbitals. The nematic energy scale between dxz and dyz bands reaches a maximum of 50 meV at the Brillouin zone corner. We are also able to track the dxz electron pocket across the nematic transition and explain its absence in the nematic state. Our comprehensive data of the electronic structure provide an accurate basis for theoretical models of the superconducting pairing in FeSe.},
doi = {10.1103/PhysRevX.9.041049},
journal = {Physical Review. X},
number = 4,
volume = 9,
place = {United States},
year = {2019},
month = {12}
}
DOI: https://doi.org/10.1103/PhysRevX.9.041049
Web of Science
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