Magnonic Superconductivity

We uncover a new superconducting state with partial spin polarization induced by a magnetic field. This state, which we call "magnonic superconductor", lacks a conventional pairing order parameter, but is characterized instead by a composite order parameter that represents the binding of e...

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Bibliographic Details
Published in:arXiv.org 2024-10
Main Authors: Nazaryan, Khachatur G, Fu, Liang
Format: Article
Language:English
Subjects:
Cooper pairs
Magnons
Order parameters
Polarization (spin alignment)
Superconductivity
Transition temperature
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Summary:We uncover a new superconducting state with partial spin polarization induced by a magnetic field. This state, which we call "magnonic superconductor", lacks a conventional pairing order parameter, but is characterized instead by a composite order parameter that represents the binding of electron pairs and magnons. We rigorously demonstrate the existence of magnonic superconductivity with high transition temperature in a triangular lattice Hubbard model with repulsive interaction. We further show that magnonic Cooper pairs can attract to form higher-charge bound states, which can give rise to charge-\(6e\) superconductivity.
ISSN:2331-8422