ultraviolet photoelectron spectra/ ultraviolet photoemissionCaVO 3electronic structuresingle-crystalline samplesultrahigh vacuumUPSThe electronic structure of CaVO 3 is studied on single-crystalline samples cle
Helium lamp Photoemission UPS UV light Valence band Work function 1. Introduction Ultraviolet photoelectron spectroscopy (UPS), while less commonly used than X-ray photoelectron spectroscopy (XPS), has important applications in chemistry, physics, and materials science. Similar to XPS, photons irradiate...
Photoemission(UPS)theory Atcertaindirection(determinedbyqandf)thewavevectorofemittedelectrons(freeelectronsintothevacuum)withkineticenergyEkinis:Kex=(2mEkin/h)1/2 Howtodetermineitsorigininthesolid?Thefirststep Theopticalexcitationofanelectroninthefirststepissimplydescribedby“goldenrule”Thetransitionhappened...
Ultraviolet Photoelectron Spectroscopy (UPS) UV light ( hn = 5 to 100 eV) to excite photoelectron. From an analysis of the kinetic energy and ..
Kera, K. Kanai, in Fundamental Electronic Structure of Organic Solids and Their Interfaces by Photoemission Spectroscopy and Related Methods, ed. by N. Koch, N. Ueno, A.T.S. Wee. The Molecule-Metal Interface, Chap. 7 (Wiley, 2013, Weinheim), p. 179 Y. Huang, R. Wang, T.C. Niu...
“information depth” from which > 99% of a photoemission signal originates conventionally being defined at 3 mean free path lengths from the surface, which in XPS is often quoted as 10 nm. This is an approximation as the IMFP of an electron is determined by the material properties of the...
the inherent surface sensitivity of XPS is due to the short inelastic mean free path (IMFP, or λ) of free electrons within a solid, with the so-called “information depth” from which > 99% of a photoemission signal originates conventionally being defined at 3 mean free path le...
ultraviolet photoemission spectroscopyAlso found in: Encyclopedia. Related to ultraviolet photoemission spectroscopy: Photoelectron spectroscopyultraviolet photoemission spectroscopy n. A spectroscopic technique that determines the band structure and binding energy of electrons in small groups of molecules by ...
Reflection electron-energy-loss spectroscopy (ELS) and ultraviolet-photoemission spectroscopy (UPS) have been used to study the electronic properties of VN(0.0<=x<0.96). Polycrystalline samples of several compositions have been fabricated with special care to avoid oxygen contamination. ELS is used to...
Laser-dressed photoelectron spectroscopy, employing extreme-ultraviolet attosecond pulses obtained by femtosecond-laser-driven high-order harmonic generation, grants access to atomic-scale electron dynamics. Limited by space charge effects determining th