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Distinguishing between and pairing symmetries in multiband superconductors through spontaneous magnetization pattern induced by a defect
Abstract
The symmetry of the pairing state in iron pnictide superconductor Ba1-xKxFe2As2 is still controversial. At optimal doping (x ≈ 0.4), it is very likely s wave, but for x = 1 there are experimental and theoretical arguments for both s wave and d wave. Depending on the choice for x = 1 , intermediate s + i s and s + i d states have been proposed for intermediate doping 0.4 < x < 1 . In both states, the time-reversal symmetry is broken and a spontaneous magnetization is allowed. Here in this work we study a spontaneous magnetization induced by a nonmagnetic defect in the s + i s and s + i d states by using a perturbation theory and numerical calculations for the Ginzburg-Landau free energy functional. We show that the angular dependence of the magnetization is distinct in these two states due to the difference in symmetry properties of the order parameters. Our results indicate a possible way to distinguish between the s + i s and s + i d pairing symmetries in multiband superconductors.
- Authors:
-
[1];
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Florida, Gainesville, FL (United States). Dept. of Physics
- Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1459626
- Alternate Identifier(s):
- OSTI ID: 1310845
- Report Number(s):
- LA-UR-16-24723
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1901584
- Grant/Contract Number:
- AC52-06NA25396; SC0014402
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 6; 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; Material Science
Citation Formats
Lin, Shi-Zeng, Maiti, Saurabh, and Chubukov, Andrey. Distinguishing between s+id and s+is pairing symmetries in multiband superconductors through spontaneous magnetization pattern induced by a defect. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.064519.
Lin, Shi-Zeng, Maiti, Saurabh, & Chubukov, Andrey. Distinguishing between s+id and s+is pairing symmetries in multiband superconductors through spontaneous magnetization pattern induced by a defect. United States. https://doi.org/10.1103/PhysRevB.94.064519
Lin, Shi-Zeng, Maiti, Saurabh, and Chubukov, Andrey. 2016.
"Distinguishing between s+id and s+is pairing symmetries in multiband superconductors through spontaneous magnetization pattern induced by a defect". United States. https://doi.org/10.1103/PhysRevB.94.064519. https://www.osti.gov/servlets/purl/1459626.
@article{osti_1459626,
title = {Distinguishing between s+id and s+is pairing symmetries in multiband superconductors through spontaneous magnetization pattern induced by a defect},
author = {Lin, Shi-Zeng and Maiti, Saurabh and Chubukov, Andrey},
abstractNote = {The symmetry of the pairing state in iron pnictide superconductor Ba1-xKxFe2As2 is still controversial. At optimal doping (x ≈ 0.4), it is very likely s wave, but for x = 1 there are experimental and theoretical arguments for both s wave and d wave. Depending on the choice for x = 1 , intermediate s + i s and s + i d states have been proposed for intermediate doping 0.4 < x < 1 . In both states, the time-reversal symmetry is broken and a spontaneous magnetization is allowed. Here in this work we study a spontaneous magnetization induced by a nonmagnetic defect in the s + i s and s + i d states by using a perturbation theory and numerical calculations for the Ginzburg-Landau free energy functional. We show that the angular dependence of the magnetization is distinct in these two states due to the difference in symmetry properties of the order parameters. Our results indicate a possible way to distinguish between the s + i s and s + i d pairing symmetries in multiband superconductors.},
doi = {10.1103/PhysRevB.94.064519},
url = {https://www.osti.gov/biblio/1459626},
journal = {Physical Review B},
issn = {2469-9950},
number = 6,
volume = 94,
place = {United States},
year = {Mon Aug 29 00:00:00 EDT 2016},
month = {Mon Aug 29 00:00:00 EDT 2016}
}
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Cited by: 26 works
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Figures / Tables:
FIG. 1.: (color online) Schematic view of the spontaneous supercurrent and magnetization induced by a circular and square defect in the s + is and s + id states based on the symmetry analysis. The arrows are the direction of supercurrent and +(−) denotes the direction of the magnetization fieldmore »
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Works referencing / citing this record:
Band-dependent superconducting gap in SrFe2(As0.65P0.35)2 studied by angle-resolved photoemission spectroscopy
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Properties of dirty two-band superconductors with repulsive interband interaction: Normal modes, length scales, vortices, and magnetic response
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