Assessing the film-substrate interaction in germania films on reconstructed Au(111)

This work reports the interlayer difference of exciton and phonon performance between the top and bottom layer of a bilayer-stacked two-dimensional materials structure (BSS). Through photoluminescence (PL) and Raman spectroscopy, we find that, compared to that of the bottom layer, the top layer of BSS demonstrates PL redshift, Raman E 2 g 1 mode redshift, and lower PL intensity. Spatial inhomogeneity of PL and Raman are also observed in the BSS. Based on theoretical analysis, these exotic effects can be attributed to substrate-coupling-induced strain and doping. Our findings provide pertinent insight into film–substrate interaction, and are of great significance to researches on bilayer-stacked structures including twisted bilayer structure, Van der Waals hetero- and homo-structure.

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Ag films deposited on Si and Ti: How the film-substrate interaction influences the nanoscale film morphology

Superlattices and Microstructures ◽

10.1016/j.spmi.2017.06.021 ◽

2017 ◽

Vol 111 ◽

pp. 81-89 ◽

Cited By ~ 3

Author(s):

F. Ruffino ◽

V. Torrisi

Keyword(s):

Film Morphology ◽

Substrate Interaction ◽

Film Substrate

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Thermodynamics of Epitaxial Ferroelectric Films.

MRS Proceedings ◽

10.1557/proc-401-195 ◽

1995 ◽

Vol 401 ◽

Cited By ~ 21

Author(s):

S. B. Desu ◽

V. P. Dudkevich ◽

P. V. Dudkevich ◽

I. N. Zakharchenko ◽

G. L. Kushlyan

Keyword(s):

Thermal Expansion ◽

Phase Transitions ◽

Misfit Dislocations ◽

Ferroelectric Films ◽

Growth Stresses ◽

Substrate Interaction ◽

Thermal Expansion Coefficients ◽

Expansion Coefficients ◽

The Difference ◽

Film Substrate

AbstractThe problem of phase transitions and physical properties of the BaTiO3-type films on the (001) single-crystal substrates of the cubic syngony was solved in the limits of the Landau- Devonshire thermodynamics. The thermoelastic film-substrate interaction caused by the difference between thermal expansion coefficients was strictly taken into consideration. The model was based on the following assumptions: 1) the film is closely conjugated with the substrate; 2) the film is sufficiently “thick”to find itself unstrained at the growth temperature Ts, ( growth stresses were compensated by misfit dislocations ), and 3) the film is sufficiently “thin, and the stresses arising at the temperatures T>Ts may be considered to be uniform.

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Role of Film-Substrate Interaction in Determining the Morphology of Thin Films

MRS Proceedings ◽

10.1557/proc-103-13 ◽

1987 ◽

Vol 103 ◽

Cited By ~ 4

Author(s):

Marcia H. Grabow ◽

George H. Gilmer

Keyword(s):

Thin Films ◽

Molecular Dynamics ◽

Computer Simulations ◽

Substrate Binding ◽

Equilibrium Structure ◽

Metastable States ◽

Growth Mode ◽

Substrate Interaction ◽

Film Substrate

ABSTRACTThe equilibrium structure and metastable states of thin films have been investigated using molecular dynamics computer simulations. The energy as a function of coverage for a variety of film/substrate systems has been determined, and this information has been used to determine the growth mode and the conditions under which the film is dislocation free. In particular, the influence of the strength of the film-substrate binding will be discussed.

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