We show that an interlayer exciton condensate doped into a strongly correlated Mott insulator exhibits a remarkable enhancement of the bandwidth of the magnetic excitations (triplons). This triplon is visible in the dynamical magnetic susceptibility and can be measured using resonant inelastic x-ray scattering. The bandwidth of the triplon scales with the exciton superfluid density, but only in the limit of strong correlations. As such the triplon bandwidth acts as a probe of exciton-spin interactions in the condensate.
|Journal||Physical review B: Condensed matter and materials physics|
|Publication status||Published - 2013|
Rademaker, L., van den Brink, J., Hilgenkamp, H., & Zaanen, J. (2013). Enhancement of spin propagation due to interlayer exciton condensation. Physical review B: Condensed matter and materials physics, 88(121101), 121101-1-121101-5. . https://doi.org/10.1103/PhysRevB.88.121101