Abstract
Relaxation of step edge structures on SrTiO3(001) surface was studied using scanning tunneling microscopy. Real time observation of the step morphology was performed during annealing at 690°C. We analyzed step edge straightening quantitatively by examining the decay of Fourier components of step structures. From the wavelength dependence of the time constant, we have concluded that the dominant mass transport in straightening of step edge structure is adatom exchange between step edges and terraces.
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