David Broun uses a variety of high frequency techniques to study the dynamical and thermodynamic behaviour of electrons in cuprate high temperature superconductors, heavy fermion systems and a wide range of other novel metals, superconductors and insulators.
His current research interests include microwave spectroscopy of unconventional superconductors; field-tuned quantum criticality; 3D topological insulators; new techniques for probing spontaneous time-reversal symmetry breaking; electromagnetic properties near quantum critical points; and the use of vortex dynamics as probe of quasiparticles in unconventional superconductors.
Liang, R. et al. "Lower Critical Field and Superfluid Density of Highly Underdoped YBa2Cu3O6+x Single Crystals." Phys. Rev. Lett. 94 (March 2005): 117001.