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Proceedings of the National Academy of Sciences of the United States of America, volume 118, issue 28

Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals

Deng Liangzi 1, 2
Bontke Trevor 1, 2
Dahal R. 1, 2
Xie Yu 3, 4
Gao Bin 5
Li Xue 3, 4
Yin Ketao 6
Gooch Melissa 1, 2
Rolston Donald 1, 2
Chen Tong 5
Wu Zheng 1, 2
Ma Yanming 3, 4
Dai Pengcheng 5
Chu C.L. 1, 2, 7
Publication typeJournal Article
Publication date2021-07-07
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor11.1
ISSN00278424, 10916490
Multidisciplinary
Abstract
Significance As room temperature superconductivity (RTS) has been reported recently in hydrides at megabar pressures, the grand challenge in superconductivity research and development is no longer restricted to further increasing the superconducting transition temperature under extreme conditions and must now include concentrated efforts to lower, and better yet remove, the applied pressure required. This work addresses directly such a challenge by demonstrating our successful retention of pressure-enhanced and/or -induced superconducting phases and/or semiconducting phases without pressure in single crystals of superconducting FeSe and non-superconducting Cu-doped FeSe. The pressure-quenching technique developed in this work offers the possibility of future practical application and the unraveling of RTS recently detected in hydrides but only under high pressures. To raise the superconducting-transition temperature (Tc) has been the driving force for the long-sustained effort in superconductivity research. Recent progress in hydrides with Tcs up to 287 K under pressure of 267 GPa has heralded a new era of room temperature superconductivity (RTS) with immense technological promise. Indeed, RTS will lift the temperature barrier for the ubiquitous application of superconductivity. Unfortunately, formidable pressure is required to attain such high Tcs. The most effective relief to this impasse is to remove the pressure needed while retaining the pressure-induced Tc without pressure. Here, we show such a possibility in the pure and doped high-temperature superconductor (HTS) FeSe by retaining, at ambient pressure via pressure quenching (PQ), its Tc up to 37 K (quadrupling that of a pristine FeSe at ambient) and other pressure-induced phases. We have also observed that some phases remain stable without pressure at up to 300 K and for at least 7 d. The observations are in qualitative agreement with our ab initio simulations using the solid-state nudged elastic band (SSNEB) method. We strongly believe that the PQ technique developed here can be adapted to the RTS hydrides and other materials of value with minimal effort.

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Deng L. et al. Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals // Proceedings of the National Academy of Sciences of the United States of America. 2021. Vol. 118. No. 28.
GOST all authors (up to 50) Copy
Deng L., Bontke T., Dahal R., Xie Yu., Gao B., Li X., Yin K., Gooch M., Rolston D., Chen T., Wu Z., Ma Y., Dai P., Chu C. Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals // Proceedings of the National Academy of Sciences of the United States of America. 2021. Vol. 118. No. 28.
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RIS Copy
TY - JOUR
DO - 10.1073/pnas.2108938118
UR - https://doi.org/10.1073%2Fpnas.2108938118
TI - Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals
T2 - Proceedings of the National Academy of Sciences of the United States of America
AU - Deng, Liangzi
AU - Bontke, Trevor
AU - Dahal, R.
AU - Xie, Yu
AU - Gao, Bin
AU - Li, Xue
AU - Yin, Ketao
AU - Gooch, Melissa
AU - Rolston, Donald
AU - Chen, Tong
AU - Wu, Zheng
AU - Ma, Yanming
AU - Dai, Pengcheng
AU - Chu, C.L.
PY - 2021
DA - 2021/07/07 00:00:00
PB - Proceedings of the National Academy of Sciences (PNAS)
IS - 28
VL - 118
PMID - 34234019
SN - 0027-8424
SN - 1091-6490
ER -
BibTex
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BibTex Copy
@article{2021_Deng
author = {Liangzi Deng and Trevor Bontke and R. Dahal and Yu Xie and Bin Gao and Xue Li and Ketao Yin and Melissa Gooch and Donald Rolston and Tong Chen and Zheng Wu and Yanming Ma and Pengcheng Dai and C.L. Chu},
title = {Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
year = {2021},
volume = {118},
publisher = {Proceedings of the National Academy of Sciences (PNAS)},
month = {jul},
url = {https://doi.org/10.1073%2Fpnas.2108938118},
number = {28},
doi = {10.1073/pnas.2108938118}
}
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