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Showing 1 to 20 of 162 for “"Photoemission"”.
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Reaction dynamics studied by photoemission spectroscopy
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1984.
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Photoemission Studies of Thin Metallic Overlayer Systems
Angle-resolved photoemission spectroscopy was used to study Ag(111) monolayers on six different substrates: Ni(001), Ni(111), Cu(001), Cu(111), Au(111), and Si(111)-(7x7). The properties of surface states were also examined for several related systems: Cu(111) covered by various thicknesses of Ag, …
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Photoemission studies of noble metal semiconductor systems
… core-level, valence-band, and angle-resolved photoemission, and high-energy electron diffraction (HEED). In conjunction with the results of other surface studies, notably of scanning tunneling microscopy (STM), the findings reveal significant details of, and correlations between, these …
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Photoemission studies of thin metallic overlayer sytems
Angle-resolved photoemission spectroscopy was used to study Ag(lll) I monolayers on six different substrates: Ni(OOl), Ni(lll), Cu(OOl), Cu(lll), Au(lll), and Si(lll)-(7x7). The properties of surface states were also examined for several related systems: Cu(lll) covered by various thicknesses of …
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Angle resolved photoemission studies of silver bromide
… radiation is used to obtain both angle resolved photoemission data and angle integrated photoemission data on randomly oriented thick films of metallic silver, thin films of randomly oriented polycrystalline AgBr and AgBri, and epitaxially grown AgBr on an Ag ( 111) single crystal. The …
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Angle resolved photoemission studies of silver-bromide
… radiation is used to obtain both angle resolved photoemission data and angle integrated photoemission data on randomly oriented thick films of metallic silver, thin films of randomly oriented polycrystalline AgBr and AgBrI, and epitaxially grown AgBr on an Ag (111) single crystal.
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Photoemission Spectroscopy Studies of New Topological Insulator Materials
… as it is probed through spin- and angle-resolved photoemission spectroscopy experiments on three topological (Bi₂)m(Bi₂Se₃)n superlattices: (a) Bi₂Se₃ (m = 0, n = 1), (b) Bi₄Se₃ (m = 1, n = 1), and (c) BiSe (m = 1, n = 2). Our studies have not only proven the topological nature of these materials, …
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Photoemission Studies of Novel Charge Density Wave Systems
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-23T18:44:52Z No. of bitstreams: 1 Kidd_Timothy.pdf: 17087980 bytes, checksum: fe906676ec83edda201c0d424afa9f10 (MD5)
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Photoemission and photoelectron diffraction studies of semiconductor surfaces
… such as photoelectron diffraction (PED), photoemission extended fine structure (PEFS), and photoelectron holography (PEH), rely upon the measurement of the interference due to the photoelectron wave scattering from nearby atoms. The intensity oscillations in the data are analyzed by …
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Nonlinear optical and photoemission spectroscopies of quantum materials
… generation (SHG) and time and angle-resolved photoemission spectroscopy (tr-ARPES) based on high harmonic generation can offer a unique pathway toward studying quantum materials in the context of broken symmetries and nonequilibrium electronic structure, respectively. In particular, we …
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Spin-Orbit Delays in Photoemission from Bi2Te3 and Bi2Se3
Photoemission dynamics in solid-state materials can be observed in real-time via attosecond time-resolved photoelectron spectroscopy [1]. In this work *Reconstruction of Attosecond Beating By Interference of Two-photon Transitions* (RABBITT) [2] is applied to Bi<sub>*2*</sub>Te<sub>*3*</sub> and …
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Angle Resolved Photoemission Study of Epitaxial Chromium Dioxide Films
Chromium dioxide is predicted to be a half-metallic oxide. The electronic properties of the surface region of CrO2 have been studied by performing angle-resolved ultra-violet photoelectron spectroscopy (ARUPS) measurements on epitaxial CrO2 films. The CrO2 thin films were deposited on (100) and …
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Photoemission Studies of *Interface Effects on Thin Film Properties
… temperatures of Pb films are measured with photoemission. The quantized electronic structure in Pb films causes the thermal stability to oscillate with an approximate bilayer period. A comparison among the systems reveals a phase reversal and an amplitude deviation in the stability …
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Internal Photoemission and Energy Band Discontinuities at Semiconductor Heterojunctions
… heterojunction photodiodes. Internal photoemission from the valence band of the p$\sp{+}$ layer is observed in these devices and power law fits are used to accurately extract the threshold energy. A simple calculation then gives the size of the conduction band heterobarrier. Subsequent …
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Photoemission studies of interface effects on thin film properties
… are probed experimentally with angle-resolved photoemission spectroscopy using vacuum ultraviolet synchrotron radiation. An analysis of the measured quantum well energy levels and peak widths determines the height of the Schottky barrier, the rectifying energy barrier at a metal-semiconductor …
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Angle-resolved photoemission studies of two-dimensional electron systems
… The major experimental tool is angle-resolved photoemission spectroscopy, which can directly measure the spectral function of the quasiparticle. The study of ultrathin metallic films focuses on the substrate effect on the electronic structure of the film. Thin metallic films can support quantum …
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Angle-resolved photoemission studies of thin-film topological materials
… studied by a combined method of angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations. We have studied the electronic structure of Bi2Te3 films using ARPES with circularly-polarized lights. Our ARPES results show a thickness-dependent electronic structure of Bi2Te3 …
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Photoemission and scanning tunneling microscopy investigation of elemental-semiconductor surfaces
… at the surface via spectroscopic methods such as photoemission, and by studying the resulting surface structures by scanning tunneling microscopy (STM), a quantitative description of the interaction and reaction between adsorbate and surface can be obtained. The photoemission method allows a …
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