scholarly journals Advanced real space analysis of STM images

Author(s):  
Robert Conwell ◽  
Mitchell Yothers ◽  
Lloyd A. Bumm
Keyword(s):  
2017 ◽  
Vol 50 (6) ◽  
pp. 1821-1829 ◽  
Author(s):  
Kazimierz Skrobas ◽  
Svitlana Stelmakh ◽  
Stanislaw Gierlotka ◽  
Bogdan F. Palosz

NanoPDF64is a tool designed for structural analysis of nanocrystals based on examination of powder diffraction data with application of real-space analysis. The program allows for fast building of models of nanocrystals consisting of up to several hundred thousand atoms with either cubic or hexagonal close packed structure. The nanocrystal structure may be modified by introducing stacking faults, density modulation waves (i.e.the core–shell model) and thermal atomic vibrations. The program calculates diffraction patterns and, by Fourier transform, the reduced pair distribution functionsG(r) for the models. ExperimentalG(r)s may be quantitatively analyzed by least-squares fitting with an analytical formula.


2008 ◽  
Vol 41 (22) ◽  
pp. 8789-8799 ◽  
Author(s):  
Kazuki Mita ◽  
Mikihito Takenaka ◽  
Hirokazu Hasegawa ◽  
Takeji Hashimoto

1992 ◽  
Vol 286 ◽  
Author(s):  
Teresa D. Golden ◽  
Ryne P. Raffaelle ◽  
Richard J. Phillips ◽  
Jay A. Switzer

ABSTRACTWe have imaged fractured cross-sections of electrodeposited ceramic oxides based on the TI-Pb-O system using a scanning tunneling microscope. The goal of this work is to measure both the modulation wavelength and compositional profile of the superlattices by mapping out the electronic properties in real space on a nanometer scale. Fourier analysis was done on STM images of all superlattices to yield the modulation wavelength. The modulation wavelength from STM was then compared with those obtained, by Faraday calculation and x-ray diffraction. The STM can be used to design “better” superlattices. We have found that the composition profile in superlattices deposited by modulating the potential was more square than in superlattices deposited by modulating the current.


2016 ◽  
Vol 7 (11) ◽  
pp. 6824-6831 ◽  
Author(s):  
Jérémy R. Rouxel ◽  
Vladimir Y. Chernyak ◽  
Shaul Mukamel

A spatially non-local response tensor description of linear chiral signals such as circular dichroism is developed.


Author(s):  
Andreas Michels

Spin-misalignment correlations in real space are the subject of this chapter. The correlation function and correlation length of the spin-misalignment SANS cross section are introduced, their properties are discussed within the context of micromagnetic theory, and selected experimental data on Nd-Fe-B-based permanent magnets and nanocrystalline elemental soft (Cobalt and Nickel) and hard (Gadolinium and Terbium) magnets are reviewed.


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