Strong quantum size effects in transition metal silicide ultrathin films: Critical role of Fermi surface nesting

2012 ◽  
Vol 112 (10) ◽  
pp. 104313 ◽  
Author(s):  
Meng Li ◽  
Fei Wang ◽  
Chenhui Li ◽  
Chong Li ◽  
Qiang Sun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Fermi Surface ◽  
Ultrathin Films ◽  
Size Effects ◽  
Critical Role ◽  
Quantum Size Effects ◽  
Metal Silicide ◽  
Quantum Size ◽  
Fermi Surface Nesting

Role of Quantum-size Effects on the Dehydrogenation of CH4 on 3d TMn Clusters: DFT Calculations Combined with Data Mining

2022 ◽  
Author(s):  
Karla Furtado Andriani ◽  
Priscilla Felício Sousa ◽  
Felipe Orlando Morais ◽  
Juarez L. F. Da Silva
Keyword(s):  
Data Mining ◽  
Transition Metal ◽  
Dft Calculations ◽  
Theoretical Investigation ◽  
Size Effects ◽  
Metal Clusters ◽  
Quantum Size Effects ◽  
Transition Metal Clusters ◽  
Quantum Size

In this work, we report a theoretical investigation of the role of quantum-size effects (QSE) on the dehydrogenation of methane (CH4) on 3d transition-metal clusters, TMn , where TM =...

Possible evidence for quantum‐size effects in self‐assembled ultrathin films containing conjugated copolymers

1996 ◽  
Vol 79 (6) ◽  
pp. 3082-3088 ◽  
Author(s):  
H. Hong ◽  
M. Tarabia ◽  
H. Chayet ◽  
D. Davidov ◽  
E. Z. Faraggi ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Size Effects ◽  
Quantum Size Effects ◽  
Quantum Size ◽  
Self Assembled ◽  
Conjugated Copolymers

Ab initio investigation of quantum size effects on the adsorption of CO2, CO, H2O, and H2 on transition-metal particles

2020 ◽  
Vol 22 (16) ◽  
pp. 8998-9008
Author(s):  
Paulo C. D. Mendes ◽  
Vivianne K. Ocampo-Restrepo ◽  
Juarez L. F. Da Silva
Keyword(s):  
Particle Size ◽  
Transition Metal ◽  
Size Effects ◽  
Metal Particles ◽  
Quantum Size Effects ◽  
Preliminary Step ◽  
Quantum Size ◽  
Key Factor ◽  
Adsorption Of Co2 ◽  
Substrate Particle

Adsorption is a crucial preliminary step for the conversion of CO2, then the atomistic understanding of how substrate particle size affects this step could be a key factor to control the catalytic transformations of CO2 into higher-value products.

Role of the Metal/Semiconductor Interface in Quantum Size Effects: Pb/Si(111)

2000 ◽  
Vol 85 (24) ◽  
pp. 5158-5161 ◽  
Author(s):  
V. Yeh ◽  
L. Berbil-Bautista ◽  
C. Z. Wang ◽  
K. M. Ho ◽  
M. C. Tringides
Keyword(s):  
Size Effects ◽  
Quantum Size Effects ◽  
Semiconductor Interface ◽  
Quantum Size

INFRARED OPTICAL RESPONSE FROM Nb ON SiO2 ULTRATHIN FILMS

2007 ◽  
Vol 21 (25) ◽  
pp. 1723-1732
Author(s):  
R. VILLAGÓMEZ
Keyword(s):  
Ultrathin Films ◽  
Size Effects ◽  
Rf Sputtering ◽  
Optical Response ◽  
Quantum Size Effects ◽  
Field Calculation ◽  
Waveguide Laser ◽  
Metallic Films ◽  
Quantum Size ◽  
Semiconductor Compounds

Oscillations in the infrared reflectance from metallic ultrathin films are described as consequence of quantum size effects. In this contribution, we present experimental evidence of such oscillations for Nb ultrathin films deposited on α-type SiO 2 substrates. Also, it is shown how substrates influence the size effects and the amplitude but not the period of oscillations. Because of the strong influence from the chosen substrate due to absorption, IR reflectivity was fitted to the optical response of our metal-substrate and bare-substrate system by using the three-oscillator model and numerical calculations on the basis of the local field calculation for a single metallic quantum well. Although quantum size effects are well studied in semiconductor compounds, there are few studies of this effect in metallic films where the present investigation has its most important contribution. Measurements for p-polarized reflectance (Rp) are made using a tunable p-polarized CO 2 waveguide laser using wavelengths from the p-branch (9.4 to 9.7 μm) and R-branch (10.0 to 10.4 μm). Nb/SiO 2 ultrathin films were assembled by a conventional RF sputtering technique and tailored thicknesses were deposited from 5.5 to 55 Å.

Quantum size effects in Pb films from first principles: The role of the substrate

2006 ◽  
Vol 74 (3) ◽  
Author(s):  
Yu Jia ◽  
Biao Wu ◽  
H. H. Weitering ◽  
Zhenyu Zhang
Keyword(s):  
First Principles ◽  
Size Effects ◽  
Quantum Size Effects ◽  
Quantum Size

COMPLEX BEHAVIORS AT SIMPLE SEMICONDUCTOR AND METAL/SEMICONDUCTOR SURFACES

2003 ◽  
Vol 10 (06) ◽  
pp. 981-1008 ◽  
Author(s):  
MARÍA E. DÁVILA ◽  
JOSÉ AVILA ◽  
MARÍA CARMEN ASENSIO ◽  
GUY LE LAY
Keyword(s):  
Ultrathin Films ◽  
Size Effects ◽  
Low Temperatures ◽  
Semiconductor Surfaces ◽  
Quantum Size Effects ◽  
Comprehensive Review ◽  
One Dimensional ◽  
Quantum Size ◽  
Dynamical Fluctuations ◽  
Bcc Phase

We present in this article a comprehensive review of the dynamical fluctuations in the atomic positions that may take place, even at very low temperatures, at the clean silicon or germanium (100) surfaces or at their (111) surfaces decorated with Sn or Ag adatoms. We also elucidate the intriguing, hitherto unexplained differences observed between the two, seemingly similar, Sn/Si(111) and Sn/Ge(111) [Formula: see text] surfaces. We also describe the surprising behaviors of silver ultrathin films grown on different semiconductor surfaces, displaying in certain cases a bcc phase, a one-dimensional quasicrystalline superstructure and/or well-defined quantum size effects.

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