skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Pressure-tuned superconductivity and normal-state behavior in Ba ( Fe 0.943 Co 0.057 ) 2 As 2 near the antiferromagnetic boundary

Abstract

Superconductivity in iron pnictides is unconventional and pairing may be mediated by magnetic fluctuations in the Fe sublattice. Pressure is a clean method to explore superconductivity in iron based superconductors by tuning the ground state continuously without introducing disorder. Here we present a systematic high pressure transport study in Ba (Fe 1 - xCo x) 2 As 2 single crystals with x = 0.057, which is near the antiferromagnetic instability. Resistivity ρ = ρ 0 + AT n was studied under applied pressure up to 7.90 GPa. The parameter n approaches a minimum value of n ≈ 1 at a critical pressure P c = 3.65 GPa. Near P c, the superconducting transition temperature T c reaches a maximum value of 25.8 K. In addition, the superconducting diamagnetism at 2 K shows a sudden change around the same critical pressure. Finally, these results may be associated with a possible quantum critical point hidden inside the superconducting dome, near optimum T c.

Authors:
 [1];  [2];  [3];  [4];  [4];  [5];  [6];  [7];  [7];  [8];  [3]
  1. Center for High Pressure Science and Technology Advanced Research, Beijing (China); Zhejiang SCI-TECH Univ., Hangzhou (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China). State Key Lab. of Functional Materials for Informatics, Shanghai Inst. of Microsystem and Information Technology; Univ. of Chinese Academy of Sciences, Beijing (China).
  3. Center for High Pressure Science and Technology Advanced Research, Beijing (China)
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  5. Nanyang Technological Univ. (Singapore). Division of Physics and Applied Physics, School of Physical and Mathematical Sciences
  6. Zhejiang SCI-TECH Univ., Hangzhou (China)
  7. Chinese Academy of Sciences (CAS), Beijing (China). State Key Lab. of Functional Materials for Informatics, Shanghai Inst. of Microsystem and Information Technology
  8. Kent State Univ., Kent, OH (United States). Dept. of Physics
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1436424
Alternate Identifier(s):
OSTI ID: 1434348
Report Number(s):
IS-J-9648
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
11574338; AC02-07CH11358; DMR-1505826; U1530402
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 14; 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

Citation Formats

Liu, W., Wu, Y. F., Li, X. J., Bud'ko, S. L., Canfield, P. C., Panagopoulos, C., Li, P. G., Mu, G., Hu, T., Almasan, C. C., and Xiao, H. Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2 near the antiferromagnetic boundary. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.144515.
Liu, W., Wu, Y. F., Li, X. J., Bud'ko, S. L., Canfield, P. C., Panagopoulos, C., Li, P. G., Mu, G., Hu, T., Almasan, C. C., & Xiao, H. Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2 near the antiferromagnetic boundary. United States. doi:10.1103/PhysRevB.97.144515.
Liu, W., Wu, Y. F., Li, X. J., Bud'ko, S. L., Canfield, P. C., Panagopoulos, C., Li, P. G., Mu, G., Hu, T., Almasan, C. C., and Xiao, H. Mon . "Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2 near the antiferromagnetic boundary". United States. doi:10.1103/PhysRevB.97.144515.
@article{osti_1436424,
title = {Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2 near the antiferromagnetic boundary},
author = {Liu, W. and Wu, Y. F. and Li, X. J. and Bud'ko, S. L. and Canfield, P. C. and Panagopoulos, C. and Li, P. G. and Mu, G. and Hu, T. and Almasan, C. C. and Xiao, H.},
abstractNote = {Superconductivity in iron pnictides is unconventional and pairing may be mediated by magnetic fluctuations in the Fe sublattice. Pressure is a clean method to explore superconductivity in iron based superconductors by tuning the ground state continuously without introducing disorder. Here we present a systematic high pressure transport study in Ba (Fe1 - xCox)2 As2 single crystals with x = 0.057, which is near the antiferromagnetic instability. Resistivity ρ = ρ0 + ATn was studied under applied pressure up to 7.90 GPa. The parameter n approaches a minimum value of n ≈ 1 at a critical pressure Pc = 3.65 GPa. Near Pc, the superconducting transition temperature T c reaches a maximum value of 25.8 K. In addition, the superconducting diamagnetism at 2 K shows a sudden change around the same critical pressure. Finally, these results may be associated with a possible quantum critical point hidden inside the superconducting dome, near optimum Tc.},
doi = {10.1103/PhysRevB.97.144515},
journal = {Physical Review B},
number = 14,
volume = 97,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2018},
month = {Mon Apr 23 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 23, 2019
Publisher's Version of Record

Save / Share: