Khachatur G. Nazaryan

Nov 29, 2024 | science.org | Young-Cheul Shin |Yang Wu |Chaojiao Sun |Khachatur G. Nazaryan

AbstractWe uncover a 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.

Jul 26, 2024 | link.aps.org | Khachatur G. Nazaryan |Leonid S. Levitov

Vortices in electron fluids are a key indicator of electron hydrodynamics. However, a comprehensive framework linking macroscopic vorticity measurements with microscopic interactions and scattering mechanisms has been lacking. We employ wave-number-dependent conductivity σ(k), which incorporates rates of realistic microscopic scattering processes and is built as a continued fraction from decay rates for different excitations.