We study theoretically a setup consisting of excitons formed in two valleys, with proximity-induced Cooper pairing, different in the conduction and valence bands. Due to the combination of a Coulomb interaction with superconducting proximity effects, Cooper pairing between electrons from conduction and valence bands from different valleys is formed. This finite-energy intervalley Cooper pairing has both even- and odd-frequency contributions. We show that there is a phase transition into the formation of a robust macroscopic condensate of such Cooper pairs and present characteristics of the corresponding Higgs modes.

Close

PrevNext

View figure in article

• Excitons
• Odd-frequency superconductivity
• Order parameters
• Pairing mechanisms
• Phase diagrams
• Phase transitions
• Superconducting order parameter
• Superconducting phase transition
• Superconductivity
• Quantum many-body systems
• Quantum wells
• Superconducting devices
• Thin films
• Transition metal dichalcogenides
• Unconventional superconductors
• Finite temperature field theory
• Green's function methods
• Landau-Ginzburg theory
• Many-body techniques
• Mean field theory
• Path integrals
• Second quantization