Quantum size effects in metallic nanostructures

Tringides, Michael C.; Jałochowski, M.; Bauer, E.

doi:10.1063/1.2731973

Cited by 116 publications

(98 citation statements)

References 19 publications

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“…62,63 Usually, the film is a low-melting metal or semimetal, the most common ones being Ag, Cu, Pb, and Bi. Substrates are semiconductors ͑Si and GaAs͒ and highermelting elemental metals ͑Ni, Fe, Co, and V͒.…”

Section: Summary and Discussionmentioning

confidence: 99%

Scanning tunneling microscopy and density functional theory study of initial bilayer growth of Ag films on NiAl(110)

et al. 2007

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Scanning tunneling microscopy (STM) studies of the deposition of Ag on bcc NiAl(110) in the temperature range from 200 to 300 K reveal an initial bilayer growth mode. In this regime, which encompasses at least the first two levels of bilayer islands, the film appears to have an fcc Ag(110)-like structure. Selection of this structure reflects an almost perfect lateral match between the Ag(110) and NiAl(110) lattice constants. Density functional theory (DFT) analysis of supported Ag films with an ideal fcc(110) structure on NiAl(110) indicates that the bilayer growth mode is promoted by a quantum size effect. However, the system does not exhibit perfect Ag(110) film growth. STM analysis reveals that the tops of Ag islands are decorated by a ripple structure even in the initial levels of growth and also shows a deviation from Ag(110)-like bilayer growth to Ag(111)-like monolayer growth for thick films. DFT analysis is also applied to provide some insight into the observed deviations from perfect Ag(110) film structure.

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Section: Summary and Discussionmentioning

confidence: 99%

Scanning tunneling microscopy and density functional theory study of initial bilayer growth of Ag films on NiAl(110)

et al. 2007

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“…[1][2][3] Properties will be influenced to varying degrees depending upon the proximity of QW state binding energies to the Fermi energy. The binding energies of QW states are determined by several factors, including bulk band dispersion and film thickness.…”

Section: Introductionmentioning

confidence: 99%

“…Evidence of a QSE in film and island morphology has been observed for many metals on various substrates. [3][4][5][6][7][8][9][10][11][12][13][14] This effect is envisioned to be a mechanism for exercising control over island or film morphology. Such a capability to control the dimensions of nanostructures is essential for varying and controlling their electronic structure and properties.…”

Section: Introductionmentioning

confidence: 99%

Quantum size effect driven thermal decomposition of Ag films on Fe(100) in the presence of pinhole-growth morphological defects

2010

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The growth morphology of Ag films that are deposited on an Fe͑100͒ surface at room temperature has been investigated using low-energy electron-diffraction spot-profile analysis and low-energy electron microscopy. The superposition of periodic spot-profile modulations that are caused by interference of waves that are reflected from the surface at different exposed levels and intensity oscillations that are associated with quantum-well resonances within the film provides complementary information on film roughness and thickness. The predominant morphological defect that is present during layer-by-layer growth is determined to be pinholes that penetrate completely through the film to the Fe substrate surface. Such imperfect films are observed to decompose upon annealing to thicknesses that are stabilized by quantum-well states. This result suggests that pinholes eliminate kinetic limitations that promote the unusual bifurcation mode of thermal decomposition that was observed previously for atomically smooth films prepared at low temperature.

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“…In simple metals, ultrathin films are known to exhibit quantum confinement (QC) effects due to the confinement of electrons inside the conducting layers [4]. These effects alter the electronic structure and N 0 , so they can result in striking variations of the physical properties such as conductivity, magnetism, and the Hall effect.…”

mentioning

confidence: 99%

Fundamental Thickness Limit of Itinerant FerromagneticSrRuO3Thin Films

et al. 2009

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Quantum size effects in metallic nanostructures

Abstract: Electrons confined in ultrathin metal films provide a window on the peculiar world of quantum mechanics.

Cited by 116 publications

References 19 publications

Scanning tunneling microscopy and density functional theory study of initial bilayer growth of Ag films on NiAl(110)

Scanning tunneling microscopy and density functional theory study of initial bilayer growth of Ag films on NiAl(110)

Quantum size effect driven thermal decomposition of Ag films on Fe(100) in the presence of pinhole-growth morphological defects

Fundamental Thickness Limit of Itinerant FerromagneticSrRuO3Thin Films

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