Optical anisotropy in optimally doped iron-based superconductor
Abstract
The divergent nematic susceptibility, obeying a simple Curie-Weiss power law over a large temperature interval, is empirically found to be a ubiquitous signature in several iron-based materials across their doping-temperature phase diagram. The composition at which the associated Weiss temperature extrapolates to zero is found to be close to optimal doping, boosting the debate to what extent nematic fluctuations contribute to the pairing-mechanism and generally affect the electronic structure of iron-based superconductors. Here, we offer a comprehensive optical investigation of the optimally hole-doped Ba0.6K0.4Fe2As2 over a broad spectral range, as a function of temperature and of tunable applied stress, which acts as an external symmetry breaking field. We show that the stress-induced optical anisotropy in the infrared spectral range is reversible upon sweeping the applied stress and occurs only below the superconducting transition temperature. These findings demonstrate that there is a large electronic nematicity at optimal doping which extends right under the superconducting dome.
- Authors:
-
- ETH - Zurich, Zurich (Switzerland)
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1526993
- Grant/Contract Number:
- AC02-76SF0051
- Resource Type:
- Accepted Manuscript
- Journal Name:
- npj Quantum Materials
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2397-4648
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Pal, Anirban, Chinotti, Manuel, Chu, Jiun -Haw, Kuo, Hseuh -Hui, Fisher, Ian Randal, and Degiorgi, Leonardo. Optical anisotropy in optimally doped iron-based superconductor. United States: N. p., 2019.
Web. doi:10.1038/s41535-018-0140-1.
Pal, Anirban, Chinotti, Manuel, Chu, Jiun -Haw, Kuo, Hseuh -Hui, Fisher, Ian Randal, & Degiorgi, Leonardo. Optical anisotropy in optimally doped iron-based superconductor. United States. https://doi.org/10.1038/s41535-018-0140-1
Pal, Anirban, Chinotti, Manuel, Chu, Jiun -Haw, Kuo, Hseuh -Hui, Fisher, Ian Randal, and Degiorgi, Leonardo. Thu .
"Optical anisotropy in optimally doped iron-based superconductor". United States. https://doi.org/10.1038/s41535-018-0140-1. https://www.osti.gov/servlets/purl/1526993.
@article{osti_1526993,
title = {Optical anisotropy in optimally doped iron-based superconductor},
author = {Pal, Anirban and Chinotti, Manuel and Chu, Jiun -Haw and Kuo, Hseuh -Hui and Fisher, Ian Randal and Degiorgi, Leonardo},
abstractNote = {The divergent nematic susceptibility, obeying a simple Curie-Weiss power law over a large temperature interval, is empirically found to be a ubiquitous signature in several iron-based materials across their doping-temperature phase diagram. The composition at which the associated Weiss temperature extrapolates to zero is found to be close to optimal doping, boosting the debate to what extent nematic fluctuations contribute to the pairing-mechanism and generally affect the electronic structure of iron-based superconductors. Here, we offer a comprehensive optical investigation of the optimally hole-doped Ba0.6K0.4Fe2As2 over a broad spectral range, as a function of temperature and of tunable applied stress, which acts as an external symmetry breaking field. We show that the stress-induced optical anisotropy in the infrared spectral range is reversible upon sweeping the applied stress and occurs only below the superconducting transition temperature. These findings demonstrate that there is a large electronic nematicity at optimal doping which extends right under the superconducting dome.},
doi = {10.1038/s41535-018-0140-1},
journal = {npj Quantum Materials},
number = 1,
volume = 4,
place = {United States},
year = {Thu Jan 10 00:00:00 EST 2019},
month = {Thu Jan 10 00:00:00 EST 2019}
}
Web of Science
Figures / Tables:
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