Speaker
Description
Diamond offers excellent prospects for the study of phonon transport phenomena beyond Fourier's law at room temperature. Here, we investigate heat transport properties of suspended diamond microstructures using NV centers in the diamond lattice as in-situ temperature sensors. We present diffraction-limited spatially resolved measurements of temperature across suspended cantilevers, with a temperature resolution below 100mK using frequency-modulated lock-in readout of the spin resonance. We extract the effective thermal conductivity of each cantilever and reveal a surprisingly steep dependence on the cantilever lateral dimension, highlighting the need for further experiments and theoretical refinement to fully understand boundary and confinement effects.
