Disorder-Driven Transition from to Superconducting Order Parameter in Proton Irradiated Single Crystals
Abstract
Here, microwave measurements of the London penetration depth and critical temperature T c were used to show evidence of a disordered-driven transition from s ± to s ++ order parameter symmetry in optimally doped Ba(Fe 1–xRh x) 2As 2 single crystals, where disorder was induced by means of 3.5 MeV proton irradiation. Signatures of such a transition, as theoretically predicted, are found as a drop in the low-temperature values of the London penetration depth and a virtually disorder-independent superconducting T c. We show how these experimental observations can be described by multiband Eliashberg calculations in which the effect of disorder is accounted for in a suitable way. To this aim, an effective two-band approach is adopted, allowing us to treat disorder in a range between the Born approximation and the unitary limit.
- Authors:
-
- Politecnico di Torino, Torino (Italy); Istituto Nazionale di Fisica Nucleare, Torino (Italy)
- Politecnico di Torino, Torino (Italy); National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moskva (Russia)
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1471223
- Alternate Identifier(s):
- OSTI ID: 1468839
- Report Number(s):
- IS-J-9753
Journal ID: ISSN 0031-9007; PRLTAO
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 10; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Ghigo, Gianluca, Torsello, D., Ummarino, G. A., Gozzelino, L., Tanatar, M. A., Prozorov, R., and Canfield, P. C. Disorder-Driven Transition from s± to s++ Superconducting Order Parameter in Proton Irradiated Ba(Fe1-xRhx)2As2 Single Crystals. United States: N. p., 2018.
Web. doi:10.1103/PhysRevLett.121.107001.
Ghigo, Gianluca, Torsello, D., Ummarino, G. A., Gozzelino, L., Tanatar, M. A., Prozorov, R., & Canfield, P. C. Disorder-Driven Transition from s± to s++ Superconducting Order Parameter in Proton Irradiated Ba(Fe1-xRhx)2As2 Single Crystals. United States. https://doi.org/10.1103/PhysRevLett.121.107001
Ghigo, Gianluca, Torsello, D., Ummarino, G. A., Gozzelino, L., Tanatar, M. A., Prozorov, R., and Canfield, P. C. Tue .
"Disorder-Driven Transition from s± to s++ Superconducting Order Parameter in Proton Irradiated Ba(Fe1-xRhx)2As2 Single Crystals". United States. https://doi.org/10.1103/PhysRevLett.121.107001. https://www.osti.gov/servlets/purl/1471223.
@article{osti_1471223,
title = {Disorder-Driven Transition from s± to s++ Superconducting Order Parameter in Proton Irradiated Ba(Fe1-xRhx)2As2 Single Crystals},
author = {Ghigo, Gianluca and Torsello, D. and Ummarino, G. A. and Gozzelino, L. and Tanatar, M. A. and Prozorov, R. and Canfield, P. C.},
abstractNote = {Here, microwave measurements of the London penetration depth and critical temperature Tc were used to show evidence of a disordered-driven transition from s± to s++ order parameter symmetry in optimally doped Ba(Fe1–xRhx)2As2 single crystals, where disorder was induced by means of 3.5 MeV proton irradiation. Signatures of such a transition, as theoretically predicted, are found as a drop in the low-temperature values of the London penetration depth and a virtually disorder-independent superconducting Tc. We show how these experimental observations can be described by multiband Eliashberg calculations in which the effect of disorder is accounted for in a suitable way. To this aim, an effective two-band approach is adopted, allowing us to treat disorder in a range between the Born approximation and the unitary limit.},
doi = {10.1103/PhysRevLett.121.107001},
url = {https://www.osti.gov/biblio/1471223},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 10,
volume = 121,
place = {United States},
year = {2018},
month = {9}
}
Web of Science
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