Theoretical Analysis of Electron Standing Waves and Electric Field Intensity in the Vacuum Gap of Scanning Tunneling Microscopy

2003 ◽  
Vol 42 (Part 1, No. 7B) ◽  
pp. 4642-4645 ◽  
Author(s):  
Koji Ando ◽  
Noah Bray-Ali ◽  
Yoshihiro Gohda ◽  
Satoshi Watanabe
Keyword(s):  
Theoretical Analysis ◽  
Electric Field ◽  
Scanning Tunneling Microscopy ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Standing Waves ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Vacuum Gap

scholarly journals Structural determination of the Si(111) √3×√3-Bi surface by x-ray standing waves and scanning tunneling microscopy

1994 ◽  
Vol 50 (16) ◽  
pp. 12246-12249 ◽  
Author(s):  
J. C. Woicik ◽  
G. E. Franklin ◽  
Chien Liu ◽  
R. E. Martinez ◽  
I.-S. Hwong ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Standing Waves ◽  
Scanning Tunneling ◽  
Structural Determination ◽  
Tunneling Microscopy ◽  
X Ray

scholarly journals Scanning Tunneling Microscopy of Atomic Scale Phonon Standing Waves in Quasi-freestanding WSe2 Monolayers

MRS Advances ◽  
2016 ◽  
Vol 1 (22) ◽  
pp. 1645-1650 ◽  
Author(s):  
Igor Altfeder ◽  
Sarah M. Eichfeld ◽  
Rachel D. Naguy ◽  
Joshua A. Robinson ◽  
Andrey A. Voevodin
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Phonon Scattering ◽  
Standing Waves ◽  
Zero Point ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Atomic Size ◽  
Breaking Effect ◽  
Zone Edge

ABSTRACTUsing scanning tunneling microscopy (STM) we observed atomic scale interference patterns on quasi-freestanding WSe2 islands grown on top of graphene. The bias-independent double atomic size periodicity of these patterns and the sharp Brillouin zone edge revealed by 2D STM Fourier analysis indicate formation of optical phonon standing waves due to scattering on intercalating defects supporting these islands. Standing wave patterns of both synchronized and non-synchronized optical phonons, corresponding to resonant and non-resonant phonon scattering regimes, were experimentally observed. We also found the symmetry breaking effect for individual phonon wave packets, one of the unique features distinguishing phonon standing waves. We show that vibrational and electronic anharmonicities are responsible for STM detection of these patterns. A significant contribution to the interference contrast arises from quantum zero-point oscillations.

ELECTRIC-FIELD DEPENDENCE OF MOLECULAR CONFORMATIONS OBSERVED BY USING SCANNING TUNNELING MICROSCOPY

NANO ◽  
2008 ◽  
Vol 03 (02) ◽  
pp. 83-94
Author(s):  
XIAO JING MA ◽  
RUI ZHANG ◽  
YONG TAO SHEN ◽  
XIAO HUI QIU ◽  
YAN LIAN YANG ◽  
...  
Keyword(s):  
Electric Field ◽  
Scanning Tunneling Microscopy ◽  
Functional Groups ◽  
Field Dependence ◽  
Conformational Changes ◽  
Supramolecular Structures ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Molecular Conformations ◽  
Electric Field Dependence

We review the progress in observation of electrically induced conformational changes of a range of single molecules and molecular assemblies using scanning tunneling microscopy (STM). Recent results using species with optical active functional groups and supramolecular structures confirmed the previously observed effects that the cholesterol molecules with soft linkers have the conformational bistability when switching the bias polarity, while no discernable changes were observed for the mesogen molecules, containing rigid linking units. In addition, it was also observed that the linker units could have appreciable impacts on the assembling characteristics.

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