3 papers
cond-mat.supr-con2025
Superfluid stiffness bounds in time-reversal symmetric superconductors
Yongxin Zeng, Andrew J. Millis
Quantum geometry has been shown to make an important contribution to the superfluid stiffness of superconductors, especially for flat-band systems such as moiré materials. In this…
cond-mat.mes-hall2025
Berry Phase Dynamics of Sliding Electron Crystals
Yongxin Zeng, Andrew J. Millis
Systems such as Wigner crystals and incommensurate charge density waves that spontaneously break a continuous translation symmetry have unusual transport properties arising from th…
cond-mat.mes-hall2024
Keldysh field theory of dynamical exciton condensation transitions in nonequilibrium electron-hole bilayers
Yongxin Zeng, Valentin Crépel, Andrew J. Millis
Recent experiments have realized steady-state electrical injection of interlayer excitons in electron-hole bilayers subject to a large bias voltage. In the ideal case in which inte…