Nanoscale sensing of spatial correlations in nonequilibrium current noise
This work uses nitrogen-vacancy (NV) centers in diamond to measure spatial correlations in nonequilibrium current noise within two-dimensional metals. By developing a theoretical framework based on the Boltzmann equation, the study predicts strongly spatially anisotropic noise patterns. This anisotropy reveals the nonequilibrium nature of electron distributions and provides insight into transport mechanisms and excitation lifetimes.