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The observation of π-shifts in the Little-Parks effect in 4Hb-TaS 2 .
- Source :
-
Nature communications [Nat Commun] 2024 May 30; Vol. 15 (1), pp. 4623. Date of Electronic Publication: 2024 May 30. - Publication Year :
- 2024
-
Abstract
- Finding evidence of non-trivial pairing states is one of the greatest experimental challenges in the field of unconventional superconductivity. Such evidence requires phase-sensitive probes susceptible to the internal structure of the order parameter. We report the measurement of the Little-Parks effect in the unconventional superconductor candidate 4Hb-TaS <subscript>2</subscript> . In half of our rings, which are fabricated from single-crystals, we find a π-shift in the transition-temperature oscillations. According to theory, such a π-shift is only possible if the order parameter is non-s-wave. In the absence of crystallographic defects, the shift provides evidence of a multi-component order parameter. Thus, this observation increases the likelihood of the two-component order parameter scenario in 4Hb-TaS <subscript>2</subscript> . Furthermore, we show that T <subscript>c</subscript> is enhanced as a function of the out-of-plane field when a constant in-plane field is applied, which we explain using a two-component order-parameter.<br /> (© 2024. The Author(s).)
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 15
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 38816364
- Full Text :
- https://doi.org/10.1038/s41467-024-48260-x