Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe1-xNixAs
Abstract
Understanding the interplay between nematicity, magnetism and superconductivity is pivotal for elucidating the physics of iron-based superconductors. Here we use neutron scattering to probe magnetic and nematic orders throughout the phase diagram of NaFe1-xNixAs, finding that while both static antiferromagnetic and nematic orders compete with superconductivity, the onset temperatures for these two orders remain well separated approaching the putative quantum critical points. We uncover local orthorhombic distortions that persist well above the tetragonal-to-orthorhombic structural transition temperature Ts in underdoped samples and extend well into the overdoped regime that exhibits neither magnetic nor structural phase transitions. These unexpected local orthorhombic distortions display Curie–Weiss temperature dependence and become suppressed below the superconducting transition temperature Tc, suggesting that they result from the large nematic susceptibility near optimal superconductivity. Finally, our results account for observations of rotational symmetry breaking above Ts, and attest to the presence of significant nematic fluctuations near optimal superconductivity.
- Authors:
-
- Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
- Northwestern Polytechnical Univ., Xian (China). Dept. of Applied Physics
- Max-Planck-Inst. fur Festkorperforschung, Stuttgart (Germany); Max Planck Society Outstation at the Forschungsneutronenquelle Heinz Maier-Leibnitz (MLZ), Garching (Germany)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Renmin Univ. of China, Beijing (China). Dept. of Physics and Beijing Key Lab. of Opto-electronic Functional Materials and Micro-nano Devices
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1463970
- Grant/Contract Number:
- AC05-00OR22725; SC0012311; C-1839; C-1818; DMR-1350237
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Wang, Weiyi, Song, Yu, Cao, Chongde, Tseng, Kuo-Feng, Keller, Thomas, Li, Yu, Harriger, L. W., Tian, Wei, Chi, Songxue, Yu, Rong, Nevidomskyy, Andriy H., and Dai, Pengcheng. Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe1-xNixAs. United States: N. p., 2018.
Web. doi:10.1038/s41467-018-05529-2.
Wang, Weiyi, Song, Yu, Cao, Chongde, Tseng, Kuo-Feng, Keller, Thomas, Li, Yu, Harriger, L. W., Tian, Wei, Chi, Songxue, Yu, Rong, Nevidomskyy, Andriy H., & Dai, Pengcheng. Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe1-xNixAs. United States. https://doi.org/10.1038/s41467-018-05529-2
Wang, Weiyi, Song, Yu, Cao, Chongde, Tseng, Kuo-Feng, Keller, Thomas, Li, Yu, Harriger, L. W., Tian, Wei, Chi, Songxue, Yu, Rong, Nevidomskyy, Andriy H., and Dai, Pengcheng. Tue .
"Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe1-xNixAs". United States. https://doi.org/10.1038/s41467-018-05529-2. https://www.osti.gov/servlets/purl/1463970.
@article{osti_1463970,
title = {Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe1-xNixAs},
author = {Wang, Weiyi and Song, Yu and Cao, Chongde and Tseng, Kuo-Feng and Keller, Thomas and Li, Yu and Harriger, L. W. and Tian, Wei and Chi, Songxue and Yu, Rong and Nevidomskyy, Andriy H. and Dai, Pengcheng},
abstractNote = {Understanding the interplay between nematicity, magnetism and superconductivity is pivotal for elucidating the physics of iron-based superconductors. Here we use neutron scattering to probe magnetic and nematic orders throughout the phase diagram of NaFe1-xNixAs, finding that while both static antiferromagnetic and nematic orders compete with superconductivity, the onset temperatures for these two orders remain well separated approaching the putative quantum critical points. We uncover local orthorhombic distortions that persist well above the tetragonal-to-orthorhombic structural transition temperature Ts in underdoped samples and extend well into the overdoped regime that exhibits neither magnetic nor structural phase transitions. These unexpected local orthorhombic distortions display Curie–Weiss temperature dependence and become suppressed below the superconducting transition temperature Tc, suggesting that they result from the large nematic susceptibility near optimal superconductivity. Finally, our results account for observations of rotational symmetry breaking above Ts, and attest to the presence of significant nematic fluctuations near optimal superconductivity.},
doi = {10.1038/s41467-018-05529-2},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Tue Aug 07 00:00:00 EDT 2018},
month = {Tue Aug 07 00:00:00 EDT 2018}
}
Web of Science
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