Photoemission from Quantum-Well States in Ultrathin Xe crystals

Spin-Dependent Quantum Interference from Epitaxial MgO Thin Films on Fe(001)

“…Such behavior exists only in atomically flat thin films [23,31], confirming again the high quality of our MgO films on Fe(001). Since the observed QW states are in the unoccupied band above the vacuum level, it leaves open whether the quantization of electronic states could also exist in the occupied band of the MgO insulating layer, similar to the QW states observed by photoemission in insulating noble-gas layers at cryogenic temperatures [32].…”

Time-Resolved Photoimaging of Image-Potential States in Carbon Nanotubes

“…For years, the investigation of these states above metal surfaces has served as a powerful tool for probing a variety of physical and chemical phenomena on the nanometer scale [1][2][3][4][5][6][7][8][9][10]. The unique properties of image states are determined by the extreme sensitivity of ''image'' electrons to any changes in the dielectric susceptibility at the surface.…”

“…The unique properties of image states are determined by the extreme sensitivity of ''image'' electrons to any changes in the dielectric susceptibility at the surface. Therefore, through measurements of their binding energies and lifetimes it is possible to elucidate many complex processes that ultimately promote our knowledge of surface structure, optical properties at interfaces [7], electronic structure at heterojunctions [8], layer growth morphology [9], and surface reactivity [10].…”

Dynamics and Spatial Distribution of Electrons in Quantum Wells at Interfaces Determined by Femtosecond Photoemission Spectroscopy

“…Physisorbed multilayers of Xe on a noble metal surface [8,9] have recently been identified as an important model system for understanding carrier dynamics at interfaces and in quantum wells. Since solid Xe can be considered a wide-gap semiconductor, aspects of this model system are similar to those of a metal-semiconductor interface.…”