Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Substitution of Ni for Fe in Superconducting Fe0.98Te0.5Se0.5 Depresses the Normal-State Conductivity but not the Magnetic Spectral Weight

Published

Author(s)

Jinghui Wang, Ruidan Zhong, Shichao Li, Yuan Gan, Zhijun Xu, Cheng Zhang, T Ozaki, M. Matsuda, Yang Zhao, Qiang Li, Guangyong Xu, Genda Gu, J. M. Tranquada, R. J. Birgeneau, Jinsheng Wen

Abstract

We have performed systematic resistivity and inelastic neutron scattering measurements on Fe0.98-zNizTe0.5Se0.5 samples to study the impact of Ni substitution on the transport properties and the low-energy (less than or equal to} 12 meV) magnetic excitations. It is found that, with increasing Ni doping, both the conductivity and superconductivity are gradually suppressed; in contrast, the low-energy magnetic spectral weight changes little. Comparing with the impact of Co and Cu substitution, we find that the effects on conductivity and superconductivity for the same degree of substitution grow systematically as the atomic number of the substituent deviates from that of Fe. The impact of the substituents as scattering centers appears to be greater than any contribution to carrier density. The fact that low-energy magnetic spectral weight is not reduced by increased electron scattering indicates that the existence of antiferromagnetic correlations does not depend on electronic states close to the Fermi energy.
Citation
Physical Review B
Volume
91
Issue
1

Keywords

Superconductivity, neutron scattering

Citation

Wang, J. , Zhong, R. , Li, S. , Gan, Y. , Xu, Z. , Zhang, C. , Ozaki, T. , Matsuda, M. , Zhao, Y. , Li, Q. , Xu, G. , Gu, G. , Tranquada, J. , Birgeneau, R. and Wen, J. (2015), Substitution of Ni for Fe in Superconducting Fe<sub>0.98</sub>Te<sub>0.5</sub>Se<sub>0.5</sub> Depresses the Normal-State Conductivity but not the Magnetic Spectral Weight, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917771 (Accessed April 15, 2024)
Created January 4, 2015, Updated October 12, 2021