Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors
Abstract
The momentum dependence of the nematic order parameter is an important ingredient in the microscopic description of iron-based high-temperature superconductors. While recent reports on FeSe indicate that the nematic order parameter changes sign between electron and hole bands, detailed knowledge is still missing for other compounds. Combining angle-resolved photoemission spectroscopy with uniaxial strain tuning, we measure the nematic band splitting in both FeSe and BaFe2As2 without interference from either twinning or magnetic order. We find that the nematic order parameter exhibits the same momentum dependence in both compounds with a sign change between the Brillouin center and the corner. This suggests that the same microscopic mechanism drives the nematic order in spite of the very different phase diagrams.
- Authors:
-
[1];
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Stanford Univ., CA (United States)
- Stanford Univ., CA (United States); Univ. of California, Berkeley, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
- Rice Univ., Houston, TX (United States)
- Univ. of California, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; German Science Foundation (DFG); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1558082
- Alternate Identifier(s):
- OSTI ID: 1547994; OSTI ID: 1572039
- Grant/Contract Number:
- AC02-76SF00515; SC0012311; AC02-05-CH11231; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 6; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Pfau, H., Chen, S. D., Yi, M., Hashimoto, M., Rotundu, C. R., Palmstrom, J. C., Chen, T., Dai, P. -C., Straquadine, J., Hristov, A., Birgeneau, R. J., Fisher, I. R., Lu, D., and Shen, Z. -X. Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors. United States: N. p., 2019.
Web. doi:10.1103/PhysRevLett.123.066402.
Pfau, H., Chen, S. D., Yi, M., Hashimoto, M., Rotundu, C. R., Palmstrom, J. C., Chen, T., Dai, P. -C., Straquadine, J., Hristov, A., Birgeneau, R. J., Fisher, I. R., Lu, D., & Shen, Z. -X. Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors. United States. https://doi.org/10.1103/PhysRevLett.123.066402
Pfau, H., Chen, S. D., Yi, M., Hashimoto, M., Rotundu, C. R., Palmstrom, J. C., Chen, T., Dai, P. -C., Straquadine, J., Hristov, A., Birgeneau, R. J., Fisher, I. R., Lu, D., and Shen, Z. -X. Wed .
"Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors". United States. https://doi.org/10.1103/PhysRevLett.123.066402. https://www.osti.gov/servlets/purl/1558082.
@article{osti_1558082,
title = {Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors},
author = {Pfau, H. and Chen, S. D. and Yi, M. and Hashimoto, M. and Rotundu, C. R. and Palmstrom, J. C. and Chen, T. and Dai, P. -C. and Straquadine, J. and Hristov, A. and Birgeneau, R. J. and Fisher, I. R. and Lu, D. and Shen, Z. -X.},
abstractNote = {The momentum dependence of the nematic order parameter is an important ingredient in the microscopic description of iron-based high-temperature superconductors. While recent reports on FeSe indicate that the nematic order parameter changes sign between electron and hole bands, detailed knowledge is still missing for other compounds. Combining angle-resolved photoemission spectroscopy with uniaxial strain tuning, we measure the nematic band splitting in both FeSe and BaFe2As2 without interference from either twinning or magnetic order. We find that the nematic order parameter exhibits the same momentum dependence in both compounds with a sign change between the Brillouin center and the corner. This suggests that the same microscopic mechanism drives the nematic order in spite of the very different phase diagrams.},
doi = {10.1103/PhysRevLett.123.066402},
journal = {Physical Review Letters},
number = 6,
volume = 123,
place = {United States},
year = {Wed Aug 07 00:00:00 EDT 2019},
month = {Wed Aug 07 00:00:00 EDT 2019}
}
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Figures / Tables:
FIG. 1: Detwinned FeSe at 15 K. (a,b) Spectra along the Γ–X direction, i.e. perpendicular to the applied pressure, for LH and LV polarization. (a1,b1) show the ARPES spectra divided by the Fermi function. (a2,b2) depict their second energy derivative. Lines mark the dispersions as guides to the eye. (c,d)more »
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Works referencing / citing this record:
Orbital transmutation and the electronic spectrum of FeSe in the nematic phase
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- Christensen, Morten H.; Fernandes, Rafael M.; Chubukov, Andrey V.
- Physical Review Research, Vol. 2, Issue 1
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text, January 2019
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journal, January 2020
- Christensen, Morten H.; Fernandes, Rafael M.; Chubukov, Andrey V.
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Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
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Inter-orbital nematicity and the origin of a single electron Fermi pocket in FeSe
text, January 2020
- Steffensen, Daniel; Kreisel, Andreas; Hirschfeld, P. J.
- arXiv
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