Phase diagram and neutron spin resonance of superconducting
Abstract
In this paper, we use transport and neutron scattering to study the electronic phase diagram and spin excitations of NaFe1-xCuxAs single crystals. Similar to Co- and Ni-doped NaFeAs, a bulk superconducting phase appears near x≈2% with the suppression of stripe-type magnetic order in NaFeAs. Upon further increasing Cu concentration the system becomes insulating, culminating in an antiferromagnetically ordered insulating phase near x≈50%. Using transport measurements, we demonstrate that the resistivity in NaFe1-xCuxAs exhibits non-Fermi-liquid behavior near x≈1.8%. Our inelastic neutron scattering experiments reveal a single neutron spin resonance mode exhibiting weak dispersion along c axis in NaFe0.98Cu0.02As. The resonance is high in energy relative to the superconducting transition temperature Tc but weak in intensity, likely resulting from impurity effects. These results are similar to other iron pnictides superconductors despite that the superconducting phase in NaFe1-xCuxAs is continuously connected to an antiferromagnetically ordered insulating phase near x≈50% with significant electronic correlations. Finally, therefore, electron correlations is an important ingredient of superconductivity in NaFe1-xCuxAs and other iron pnictides.
- Authors:
-
- Beijing Normal Univ. (China). Dept. of Physics
- Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
- Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy; Beijing Normal Univ. (China). Dept. of Physics
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Rice Univ., Houston, TX (United States); Beijing Normal Univ. (China)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Robert A. Welch Foundation (United States); National Basic Research Program of China; National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities (China)
- OSTI Identifier:
- 1427593
- Alternate Identifier(s):
- OSTI ID: 1342609
- Grant/Contract Number:
- AC05-00OR22725; SC0012311; C-1839; 2012CB821401; 11374011; 2014KJJCB27
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 5; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; superconductivity; crystalline systems; neutron techniques; transport techniques
Citation Formats
Tan, Guotai, Song, Yu, Zhang, Rui, Lin, Lifang, Xu, Zhuang, Tian, Long, Chi, Songxue, Graves-Brook, M. K., Li, Shiliang, and Dai, Pengcheng. Phase diagram and neutron spin resonance of superconducting NaFe1-xCuxAs. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.95.054501.
Tan, Guotai, Song, Yu, Zhang, Rui, Lin, Lifang, Xu, Zhuang, Tian, Long, Chi, Songxue, Graves-Brook, M. K., Li, Shiliang, & Dai, Pengcheng. Phase diagram and neutron spin resonance of superconducting NaFe1-xCuxAs. United States. https://doi.org/10.1103/PhysRevB.95.054501
Tan, Guotai, Song, Yu, Zhang, Rui, Lin, Lifang, Xu, Zhuang, Tian, Long, Chi, Songxue, Graves-Brook, M. K., Li, Shiliang, and Dai, Pengcheng. Fri .
"Phase diagram and neutron spin resonance of superconducting NaFe1-xCuxAs". United States. https://doi.org/10.1103/PhysRevB.95.054501. https://www.osti.gov/servlets/purl/1427593.
@article{osti_1427593,
title = {Phase diagram and neutron spin resonance of superconducting NaFe1-xCuxAs},
author = {Tan, Guotai and Song, Yu and Zhang, Rui and Lin, Lifang and Xu, Zhuang and Tian, Long and Chi, Songxue and Graves-Brook, M. K. and Li, Shiliang and Dai, Pengcheng},
abstractNote = {In this paper, we use transport and neutron scattering to study the electronic phase diagram and spin excitations of NaFe1-xCuxAs single crystals. Similar to Co- and Ni-doped NaFeAs, a bulk superconducting phase appears near x≈2% with the suppression of stripe-type magnetic order in NaFeAs. Upon further increasing Cu concentration the system becomes insulating, culminating in an antiferromagnetically ordered insulating phase near x≈50%. Using transport measurements, we demonstrate that the resistivity in NaFe1-xCuxAs exhibits non-Fermi-liquid behavior near x≈1.8%. Our inelastic neutron scattering experiments reveal a single neutron spin resonance mode exhibiting weak dispersion along c axis in NaFe0.98Cu0.02As. The resonance is high in energy relative to the superconducting transition temperature Tc but weak in intensity, likely resulting from impurity effects. These results are similar to other iron pnictides superconductors despite that the superconducting phase in NaFe1-xCuxAs is continuously connected to an antiferromagnetically ordered insulating phase near x≈50% with significant electronic correlations. Finally, therefore, electron correlations is an important ingredient of superconductivity in NaFe1-xCuxAs and other iron pnictides.},
doi = {10.1103/PhysRevB.95.054501},
journal = {Physical Review B},
number = 5,
volume = 95,
place = {United States},
year = {Fri Feb 03 00:00:00 EST 2017},
month = {Fri Feb 03 00:00:00 EST 2017}
}
Web of Science
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