English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Femtosecond electron diffraction: Preparation and characterization of (110)-oriented bismuth films

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
Fulltext (public)

1.3684975.pdf
(Publisher version), 716KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Moriena, G., Hada, M., Sciaini, G., Matsuo, J., & Miller, R. J. D. (2012). Femtosecond electron diffraction: Preparation and characterization of (110)-oriented bismuth films. Journal of Applied Physics, 111(4): 043504. doi:10.1063/1.3684975.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0028-18CB-9
Abstract
Here, we present a new approach to synthesize (110)-oriented ultrathin membranes of bismuth (Bi). This rather exotic orientation was achieved by directing the growth through rationale control of lattice matching. Bi films were hetero-epitaxially grown on the (100)-surface of freshly cleaved potassium chloride crystals. The sample orientation was characterized by x-ray and electron diffraction. In addition, high quality free-standing films were obtained after dissolution of the substrate in water and controlled evaporation. Femtosecond electron diffraction(FED) was, therefore, used to monitor the coherent shear acoustic phonons in (110)-oriented free-standing Bi films produced by impulsive femtosecond optical excitation. The small de Broglie wavelength (flat Ewald sphere) of keV-electrons combined with an off-Bragg detection scheme provided a magnified view of shear atomic motions, i.e., lattice distortions in the transverse direction. All-optical pump-probe experiments are usually insensitive to shear displacements, a fact that makes FED a unique non-contact method to achieve the complete characterization of elastic properties of nanoscale materials.