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 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.
- 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:
- 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},
journal = {Physical Review Letters},
number = 10,
volume = 121,
place = {United States},
year = {Tue Sep 04 00:00:00 EDT 2018},
month = {Tue Sep 04 00:00:00 EDT 2018}
}
Web of Science
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