Enhancement of superconductivity at a quantum critical point in (CaxSr1-x)3Rh4Sn13
Abstract
We report microscopic studies by muon spin spectroscopy of the superconducting properties as a function of chemical and hydrostatic pressure in the cubic ternary intermetallic (CaxSr1-x)3Rh4Sn13 compounds. We find evidence of a quantum critical point at a critical pressure pc in the superconducting phase, where the superfluid density increases by a factor of two and the superconducting pairing strength displays a pronounced maximum. The enhancement of superconductivity is related to the structural phase transition at pc, which is accompanied by profound changes of the Fermi surface associated to the suppression of a charge density wave (CDW). The quantum critical point separates a superconducting phase coexisting with CDW from a pure superconducting phase, while in both phases superconductivity has a strong-coupling phonon-mediated BCS-like s-wave character. Together with the related isoelectronic compound (CaxSr1-x)3Ir4Sn13, this system shows that conventional BCS superconductors in the presence of competing orders may display behaviour and characteristics of unconventional superconductors.
- Authors:
-
- Paul Scherrer Institute (PSI), Villigen (Switzerland); Max Planck Institute of Microstructure Physics, Weinburg (Germany)
- Paul Scherrer Institute (PSI), Villigen (Switzerland)
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Condensed Matter Physics; Guangxi University, Nanning (China)
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Condensed Matter Physics; University of Maryland, College Park, MD (United States)
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Condensed Matter Physics
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Swiss National Science Foundation (SNSF)
- OSTI Identifier:
- 1971485
- Report Number(s):
- BNL-224256-2023-JAAM
Journal ID: ISSN 1742-6588; TRN: US2313575
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physics. Conference Series
- Additional Journal Information:
- Journal Volume: 2462; Journal Issue: 1; Journal ID: ISSN 1742-6588
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Krieger, J. A., Guguchia, Z., Khasanov, R., Biswas, P. K., Li, L., Wang, K., Petrovic, C., and Morenzoni, E. Enhancement of superconductivity at a quantum critical point in (CaxSr1-x)3Rh4Sn13. United States: N. p., 2023.
Web. doi:10.1088/1742-6596/2462/1/012060.
Krieger, J. A., Guguchia, Z., Khasanov, R., Biswas, P. K., Li, L., Wang, K., Petrovic, C., & Morenzoni, E. Enhancement of superconductivity at a quantum critical point in (CaxSr1-x)3Rh4Sn13. United States. https://doi.org/10.1088/1742-6596/2462/1/012060
Krieger, J. A., Guguchia, Z., Khasanov, R., Biswas, P. K., Li, L., Wang, K., Petrovic, C., and Morenzoni, E. Wed .
"Enhancement of superconductivity at a quantum critical point in (CaxSr1-x)3Rh4Sn13". United States. https://doi.org/10.1088/1742-6596/2462/1/012060. https://www.osti.gov/servlets/purl/1971485.
@article{osti_1971485,
title = {Enhancement of superconductivity at a quantum critical point in (CaxSr1-x)3Rh4Sn13},
author = {Krieger, J. A. and Guguchia, Z. and Khasanov, R. and Biswas, P. K. and Li, L. and Wang, K. and Petrovic, C. and Morenzoni, E.},
abstractNote = {We report microscopic studies by muon spin spectroscopy of the superconducting properties as a function of chemical and hydrostatic pressure in the cubic ternary intermetallic (CaxSr1-x)3Rh4Sn13 compounds. We find evidence of a quantum critical point at a critical pressure pc in the superconducting phase, where the superfluid density increases by a factor of two and the superconducting pairing strength displays a pronounced maximum. The enhancement of superconductivity is related to the structural phase transition at pc, which is accompanied by profound changes of the Fermi surface associated to the suppression of a charge density wave (CDW). The quantum critical point separates a superconducting phase coexisting with CDW from a pure superconducting phase, while in both phases superconductivity has a strong-coupling phonon-mediated BCS-like s-wave character. Together with the related isoelectronic compound (CaxSr1-x)3Ir4Sn13, this system shows that conventional BCS superconductors in the presence of competing orders may display behaviour and characteristics of unconventional superconductors.},
doi = {10.1088/1742-6596/2462/1/012060},
journal = {Journal of Physics. Conference Series},
number = 1,
volume = 2462,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2023},
month = {Wed Mar 01 00:00:00 EST 2023}
}
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