Earl Ward Plummer

Experimentalist measuring the physical properties of surfaces, particularly interested in the coupling of the electronic, magnetic and structural properties (static and dynamic) at a surface. First to observe surface state at a surface. First to measure angular photoemission of single molecules adsorbed on clean surface. First to measure a charge density wave on a surface. First to measure the dispersion of multipole plasmons on surfaces. Discovered the giant Friedel oscillations on a beryllium (0001) surface. Among the first scientists to use angular resolved photoemission to determine the electronic energy bands of metals..