Elucidating the Many-Body Effect and Anomalous Pt and Ni Core Level Shifts in X-ray Photoelectron Spectroscopy of Pt–Ni Alloys

2020 ◽  
Vol 124 (4) ◽  
pp. 2313-2318 ◽  
Author(s):  
Jiatang Chen ◽  
Yun Mui Yiu ◽  
Zhiqiang Wang ◽  
Danielle Covelli ◽  
Ramaswami Sammynaiken ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Core Level ◽  
Many Body ◽  
Body Effect ◽  
X Ray ◽  
Ni Alloys ◽  
Level Shifts ◽  
The Many

X-ray photoelectron spectroscopy of nitromethane adsorption products on Si(100): A model for N 1s core-level shifts in silicon oxynitride films

2004 ◽  
Vol 95 (4) ◽  
pp. 1963-1968 ◽  
Author(s):  
J. Eng ◽  
I. A. Hubner ◽  
J. Barriocanal ◽  
R. L. Opila ◽  
D. J. Doren
Keyword(s):  
Photoelectron Spectroscopy ◽  
Core Level ◽  
Silicon Oxynitride ◽  
X Ray ◽  
Level Shifts

EXPERIMENTAL EVIDENCE OF ITINERANT Cu 3d9 - OXYGEN HOLE MANY BODY CONFIGURATION IN THE HIGH-TC SUPERCONDUCTOR YBa2Cu3O~7

1987 ◽  
Vol 01 (03n04) ◽  
pp. 853-862 ◽  
Author(s):  
A. Bianconi ◽  
A. Clozza ◽  
A. Congiu Castellano ◽  
S. Della Longa ◽  
M. De Santis ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Many Body ◽  
Initial State ◽  
Edge Structure ◽  
Xps Spectra ◽  
X Ray ◽  
Oxygen Hole ◽  
The Many

Cu L3 x-ray absorption near edge structure (XANES) and Cu L 3 x-ray photoelectron spectroscopy (XPS) of YBa2Cu3O6.5+x are compared. The breakdown of one-electron picture of its electronic structure is reported. The data are interpreted by mixing of Cu 3d9 and of [Formula: see text] (where [Formula: see text] is a hole in the oxygen derived band, ligand hole) many body configuration in the initial state. The localization of Cu 3d9 configuration is indicated by the bare Coulomb interaction Udd~6 eV . The conductivity is assigned to the itinerant [Formula: see text] configuration. The experimental evidence that the additional oxygen x, giving higher Tc , increases the weight of the [Formula: see text] configuration is reported. The presence of holes on the oxygen atoms is confirmed by the Ols XPS spectra. The Cu3+(Cu 3d8) configuration is not observed in L3 XANES in agreement with valence band XPS giving the energy of the 3d8 excited state at about 12 eV above the ground state. An energy scheme of the many body configurations in YBa2Cu3O~7 is obtained. These experiments give experimental evidence that the high Tc superconductivity is due to pairing of holes in the oxygen valence band interacting with localized electrons at the Cu sites.

Hard X‐ray photoelectron spectroscopy study of core level shifts at buried GaP/Si(001) interfaces

2020 ◽  
Vol 52 (12) ◽  
pp. 933-938
Author(s):  
Oleksandr Romanyuk ◽  
Oliver Supplie ◽  
Agnieszka Paszuk ◽  
Jan Philipp Stoeckmann ◽  
Regan George Wilks ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Core Level ◽  
Spectroscopy Study ◽  
X Ray ◽  
Level Shifts

Core‐level shifts of silicon–hydrogen species on chemically treated Si surfaces studied by high‐resolution x‐ray photoelectron spectroscopy

1995 ◽  
Vol 67 (14) ◽  
pp. 2049-2051 ◽  
Author(s):  
C. H. Bjorkman ◽  
J. L. Alay ◽  
H. Nishimura ◽  
M. Fukuda ◽  
T. Yamazaki ◽  
...  
Keyword(s):  
High Resolution ◽  
Photoelectron Spectroscopy ◽  
Core Level ◽  
X Ray ◽  
Chemically Treated ◽  
Level Shifts

scholarly journals On the prediction of core level binding energies in molecules, surfaces and solids

2018 ◽  
Vol 20 (13) ◽  
pp. 8403-8410 ◽  
Author(s):  
Francesc Viñes ◽  
Carmen Sousa ◽  
Francesc Illas
Keyword(s):  
Photoelectron Spectroscopy ◽  
State Of The Art ◽  
Binding Energies ◽  
Core Level ◽  
Chemical Environment ◽  
X Ray ◽  
Unique Information

Core level binding energies, measured by X-ray photoelectron spectroscopy providing unique information regarding the chemical environment of atoms in a system, can be estimated by a diversity of state-of-the-art accurate methods here detailed.

Energy Level Alignment at the Metal/Alq3 Interfaces Investigated with Photoemission Methods

2000 ◽  
Vol 660 ◽  
Author(s):  
Li Yan ◽  
C.W. Tang ◽  
M. G. Mason ◽  
Yongli Gao
Keyword(s):  
Energy Level ◽  
Work Function ◽  
Photoelectron Spectroscopy ◽  
Light Emission ◽  
Electron Injection ◽  
Core Level ◽  
Material Research ◽  
Level Shifts ◽  
Key Issues ◽  
Injection Materials

ABSTRACTTris(8-hydroxyquinoline) aluminum (Alq3) based organic light emission diodes (OLED) have been a focus of material research in recent years. One of the key issues in searching for a better device performance and fabricating conditions is suitable electron-injection materials. We have investigated the energy alignment and the interface formation between different metals and Alq3 using X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS). The interface is formed by depositing the target cathode material, such as Ca, Al or Al/LiF, onto an Alq3 film in a stepwise fashion in an ultrahigh vacuum environment. While the UPS results show the work function and vacuum level changes during interfaces formation, implying a possible surface dipole layer, XPS results show a more detailed and complex behavior. When a low work function metal such as Ca is deposited onto an Alq3 surface, a gap state is observed in UPS. At the same time, a new peak can be observed in the N 1s core level at a lower binding energy. These results can be characterized as charge transfer from the low work function metal to Alq3. The shifting of core levels are also observed, which may be explained by doping from metal atoms or charge diffusion. These interfaces are drastically different than the Al/Alq3 interface, which has very poor electron injection. At the Al/Alq3 interface there is a destructive chemical reaction and much smaller core level shifts are observed. Based on detailed analysis, energy level diagrams at the interface are proposed.

scholarly journals Effect of electron correlation in the decomposition of core level binding energy shifts into initial and final state contributions

2019 ◽  
Vol 21 (18) ◽  
pp. 9399-9406 ◽  
Author(s):  
Marc Figueras ◽  
Carmen Sousa ◽  
Francesc Illas
Keyword(s):  
Binding Energy ◽  
Electron Correlation ◽  
Photoelectron Spectroscopy ◽  
Core Level ◽  
Final State ◽  
X Ray ◽  
Core Level Binding Energy

The influence of electron correlation into the decomposition of core level binding energy shifts, measured by X-ray photoelectron spectroscopy (XPS), into initial and final effects is analysed for a series of molecules where these effects are noticeable.

Photoemission Study of K Doping on a Monolayer of C60 on Clean Si(001)-(2 × 1) Surface

1998 ◽  
Vol 05 (01) ◽  
pp. 101-104 ◽  
Author(s):  
Tun-Wen Pi ◽  
Le-Hong Hong ◽  
Rong-Tzong Wu ◽  
Chiu-Ping Cheng ◽  
May-Ho Ko
Keyword(s):  
Binding Energy ◽  
Work Function ◽  
Valence Band ◽  
Weak Interaction ◽  
Silicon Surface ◽  
Many Body ◽  
Body Effect ◽  
Charge Polarization ◽  
The Many ◽  
Photoemission Study

We present the first valence band photoemission study of a monolayer K x C 60 on a clean Si(001)-(2 × 1) surface. The monolayer C60 which shows weak interaction with the silicon surface reveals clear, but broadened, structures corresponding to bulk C 60. Upon K exposure, the work function drops rapidly due to charge polarization toward the Si surface, considerably affecting then the rate of the Lumo filling. Its centroid initially shown at 0.6 eV shifts to higher binding energy with higher concentration. Moreover, the LUMO always separates 1.5 ± 0.1 eV from the Homo. Features associated with the many-body effect do not appear in the spectra. The Fermi cutoff has never been observed, indicating the insulating nature of the K x C 60 surface.

scholarly journals Tunable discrete scale invariance in transition-metal pentatelluride flakes

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Yanzhao Liu ◽  
Huichao Wang ◽  
Haipeng Zhu ◽  
Yanan Li ◽  
Jun Ge ◽  
...  
Keyword(s):  
Transition Metal ◽  
Scale Invariance ◽  
Bound States ◽  
Scale Factor ◽  
Coulomb Interactions ◽  
Many Body ◽  
Body Effect ◽  
Discrete Scale Invariance ◽  
The Many ◽  
Discrete Scale

AbstractLog-periodic quantum oscillations discovered in transition-metal pentatelluride give a clear demonstration of discrete scale invariance (DSI) in solid-state materials. The peculiar phenomenon is convincingly interpreted as the presence of two-body quasi-bound states in a Coulomb potential. However, the modifications of the Coulomb interactions in many-body systems having a Dirac-like spectrum are not fully understood. Here, we report the observation of tunable log-periodic oscillations and DSI in ZrTe5 and HfTe5 flakes. By reducing the flakes thickness, the characteristic scale factor is tuned to a much smaller value due to the reduction of the vacuum polarization effect. The decreasing of the scale factor demonstrates the many-body effect on the DSI, which has rarely been discussed hitherto. Furthermore, the cut-offs of oscillations are quantitatively explained by considering the Thomas-Fermi screening effect. Our work clarifies the many-body effect on DSI and paves a way to tune the DSI in quantum materials.

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