U.S. Department of EnergyOffice of Scientific and Technical Information
Structural and Magnetic Phase Transitions near Optimal Superconductivity in
Abstract
We use nuclear magnetic resonance (NMR), high-resolution x-ray, and neutron scattering studies to study structural and magnetic phase transitions in phosphorus-doped BaFe2(As1-xPx)(2). Previous transport, NMR, specific heat, and magnetic penetration depth measurements have provided compelling evidence for the presence of a quantum critical point (QCP) near optimal superconductivity at x = 0.3. However, we show that the tetragonal-to-orthorhombic structural (T-s) and paramagnetic to antiferromagnetic (AF, T-N) transitions in BaFe2(As1-xPx)(2) are always coupled and approach T-N approximate to T-s >= T-c (approximate to 29 K) for x = 0.29 before vanishing abruptly for x >= 0.3. These results suggest that AF order in BaFe2(As1-xPx)(2) disappears in a weakly first-order fashion near optimal superconductivity, much like the electron-doped iron pnictides with an avoided QCP.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
- OSTI Identifier:
- 1391767
- DOE Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 15; 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
Hu, Ding, Lu, Xingye, Zhang, Wenliang, Luo, Huiqian, Li, Shiliang, Wang, Peipei, Chen, Genfu, Han, Fei, Banjara, Shree R., Sapkota, A., Kreyssig, A., Goldman, A. I., Yamani, Z., Niedermayer, Christof, Skoulatos, Markos, Georgii, Robert, Keller, T., Wang, Pengshuai, Yu, Weiqiang, and Dai, Pengcheng. Structural and Magnetic Phase Transitions near Optimal Superconductivity in BaFe2(As1-xPx)2. United States: N. p., 2015.
Web. doi:10.1103/PhysRevLett.114.157002.
Hu, Ding, Lu, Xingye, Zhang, Wenliang, Luo, Huiqian, Li, Shiliang, Wang, Peipei, Chen, Genfu, Han, Fei, Banjara, Shree R., Sapkota, A., Kreyssig, A., Goldman, A. I., Yamani, Z., Niedermayer, Christof, Skoulatos, Markos, Georgii, Robert, Keller, T., Wang, Pengshuai, Yu, Weiqiang, & Dai, Pengcheng. Structural and Magnetic Phase Transitions near Optimal Superconductivity in BaFe2(As1-xPx)2. United States. https://doi.org/10.1103/PhysRevLett.114.157002
Hu, Ding, Lu, Xingye, Zhang, Wenliang, Luo, Huiqian, Li, Shiliang, Wang, Peipei, Chen, Genfu, Han, Fei, Banjara, Shree R., Sapkota, A., Kreyssig, A., Goldman, A. I., Yamani, Z., Niedermayer, Christof, Skoulatos, Markos, Georgii, Robert, Keller, T., Wang, Pengshuai, Yu, Weiqiang, and Dai, Pengcheng. 2015.
"Structural and Magnetic Phase Transitions near Optimal Superconductivity in BaFe2(As1-xPx)2". United States. https://doi.org/10.1103/PhysRevLett.114.157002.
@article{osti_1391767,
title = {Structural and Magnetic Phase Transitions near Optimal Superconductivity in BaFe2(As1-xPx)2},
author = {Hu, Ding and Lu, Xingye and Zhang, Wenliang and Luo, Huiqian and Li, Shiliang and Wang, Peipei and Chen, Genfu and Han, Fei and Banjara, Shree R. and Sapkota, A. and Kreyssig, A. and Goldman, A. I. and Yamani, Z. and Niedermayer, Christof and Skoulatos, Markos and Georgii, Robert and Keller, T. and Wang, Pengshuai and Yu, Weiqiang and Dai, Pengcheng},
abstractNote = {We use nuclear magnetic resonance (NMR), high-resolution x-ray, and neutron scattering studies to study structural and magnetic phase transitions in phosphorus-doped BaFe2(As1-xPx)(2). Previous transport, NMR, specific heat, and magnetic penetration depth measurements have provided compelling evidence for the presence of a quantum critical point (QCP) near optimal superconductivity at x = 0.3. However, we show that the tetragonal-to-orthorhombic structural (T-s) and paramagnetic to antiferromagnetic (AF, T-N) transitions in BaFe2(As1-xPx)(2) are always coupled and approach T-N approximate to T-s >= T-c (approximate to 29 K) for x = 0.29 before vanishing abruptly for x >= 0.3. These results suggest that AF order in BaFe2(As1-xPx)(2) disappears in a weakly first-order fashion near optimal superconductivity, much like the electron-doped iron pnictides with an avoided QCP.},
doi = {10.1103/PhysRevLett.114.157002},
url = {https://www.osti.gov/biblio/1391767},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 15,
volume = 114,
place = {United States},
year = {2015},
month = {4}
}
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