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Magnonic superconductivity

Date
Friday, July 26, 2024 11:00 - 12:00
Speaker
Khachatur Nazaryan (MIT)
Location
Office Building West/Ground Floor/Heinzel Seminar Room
Series
Seminar/Talk
Tags
Physical Sciences Seminar, quantum_seminar_ics
Host
Maksym Serbyn
Contact
Url

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 one- and two-dimensional Hubbard models 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. 


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