Anisotropic type-I superconductivity and anomalous superfluid density in
Abstract
Here, we present a microscopic study of superconductivity in OsB2, and discuss the origin and characteristic length scales of the superconducting state. From first-principles we show that OsB2 is characterized by three different Fermi sheets, and we prove that this fermiology complies with recent quantum-oscillation experiments. Using the found microscopic properties, and experimental data from the literature, we employ Ginzburg-Landau relations to reveal that OsB2 is a distinctly type-I superconductor with a very low Ginzburg-Landau parameter κ—a rare property among compound materials. We show that the found coherence length and penetration depth corroborate the measured thermodynamic critical field. Moreover, our calculation of the superconducting gap structure using anisotropic Eliashberg theory and ab initio calculated electron-phonon interaction as input reveals a single but anisotropic gap. The calculated gap spectrum is shown to give an excellent account for the unconventional behavior of the superfluid density of OsB2 measured in experiments as a function of temperature. This reveals that gap anisotropy can explain such behavior, observed in several compounds, which was previously attributed solely to a two-gap nature of superconductivity.
- Authors:
-
- Univ. of Antwerp, Antwerp (Belgium)
- Uppsala Univ., Uppsala (Sweden)
- Univ. of Antwerp, Antwerp (Belgium); Uppsala Univ., Uppsala (Sweden)
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1335027
- Report Number(s):
- IS-J-9146
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- MP1201; AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 14; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Bekaert, Jonas, Vercauteren, S., Aperis, A., Komendova, L., Prozorov, R., Partoens, B., and Milosevic, Milorad V. Anisotropic type-I superconductivity and anomalous superfluid density in OsB2. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.144506.
Bekaert, Jonas, Vercauteren, S., Aperis, A., Komendova, L., Prozorov, R., Partoens, B., & Milosevic, Milorad V. Anisotropic type-I superconductivity and anomalous superfluid density in OsB2. United States. https://doi.org/10.1103/PhysRevB.94.144506
Bekaert, Jonas, Vercauteren, S., Aperis, A., Komendova, L., Prozorov, R., Partoens, B., and Milosevic, Milorad V. Wed .
"Anisotropic type-I superconductivity and anomalous superfluid density in OsB2". United States. https://doi.org/10.1103/PhysRevB.94.144506. https://www.osti.gov/servlets/purl/1335027.
@article{osti_1335027,
title = {Anisotropic type-I superconductivity and anomalous superfluid density in OsB2},
author = {Bekaert, Jonas and Vercauteren, S. and Aperis, A. and Komendova, L. and Prozorov, R. and Partoens, B. and Milosevic, Milorad V.},
abstractNote = {Here, we present a microscopic study of superconductivity in OsB2, and discuss the origin and characteristic length scales of the superconducting state. From first-principles we show that OsB2 is characterized by three different Fermi sheets, and we prove that this fermiology complies with recent quantum-oscillation experiments. Using the found microscopic properties, and experimental data from the literature, we employ Ginzburg-Landau relations to reveal that OsB2 is a distinctly type-I superconductor with a very low Ginzburg-Landau parameter κ—a rare property among compound materials. We show that the found coherence length and penetration depth corroborate the measured thermodynamic critical field. Moreover, our calculation of the superconducting gap structure using anisotropic Eliashberg theory and ab initio calculated electron-phonon interaction as input reveals a single but anisotropic gap. The calculated gap spectrum is shown to give an excellent account for the unconventional behavior of the superfluid density of OsB2 measured in experiments as a function of temperature. This reveals that gap anisotropy can explain such behavior, observed in several compounds, which was previously attributed solely to a two-gap nature of superconductivity.},
doi = {10.1103/PhysRevB.94.144506},
journal = {Physical Review B},
number = 14,
volume = 94,
place = {United States},
year = {Wed Oct 12 00:00:00 EDT 2016},
month = {Wed Oct 12 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Free surfaces recast superconductivity in few-monolayer MgB2: Combined first-principles and ARPES demonstration
journal, October 2017
- Bekaert, J.; Bignardi, L.; Aperis, A.
- Scientific Reports, Vol. 7, Issue 1
Computer simulation of an electronic device for generation of electric oscillations by supercooled in electric field superconductors
journal, August 2019
- Mishonov, Todor; Danchev, Victor; Chikina, Ioulia
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and magnetometry study of the type-I superconductor BeAu
journal, April 2019
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muSR and Magnetometry Study of the Type-I Superconductor BeAu
text, January 2019
- Beare, James; Nugent, Matthew; Wilson, Murray
- arXiv