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d-wave charge-4e superconductivity from fluctuating pair density waves.
- Source :
- NPJ Quantum Materials; 9/5/2024, Vol. 9 Issue 1, p1-6, 6p
- Publication Year :
- 2024
-
Abstract
- We present a theory for charge-4e superconductivity as a leading low-temperature instability with a nontrivial d-wave symmetry. We show that in several microscopic models for the pair-density-wave (PDW) state, when the PDW wave vectors connect special parts of the Fermi surface, the predominant interaction is in the bosonic pairing channel mediated by exchanging low-energy fermions. This bosonic pairing interaction is repulsive in the s-wave channel but attractive in the d-wave one, leading to a d-wave charge-4e superconductor. By analyzing the Ginzburg-Landau free energy including higher-order fluctuation effects of PDW, we find that the charge-4e superconductivity emerges as a vestigial order of PDW, and sets in via a first-order transition. Both the gap amplitude and the transition temperature decay monotonically with increasing superfluid stiffness of the PDW order. Our work provides a microscopic mechanism of higher-charge condensates with unconventional ordering symmetry in strongly-correlated materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23974648
- Volume :
- 9
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- NPJ Quantum Materials
- Publication Type :
- Academic Journal
- Accession number :
- 179460384
- Full Text :
- https://doi.org/10.1038/s41535-024-00674-y