Determination of surface stress anisotropy from domain wall fluctuations


Zandvliet, H.J.W. and Poelsema, Bene (1999) Determination of surface stress anisotropy from domain wall fluctuations. Physical Review B: Condensed matter and materials physics, 59 (11). pp. 7289-7292. ISSN 1098-0121

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Abstract:The thermally induced meandering of domain walls between (2×1) and c(4×2) regions on Ge(001) is analyzed with a scanning tunneling microscope in order to extract the anisotropy of the surface stress tensor. On small length scales the domain walls exhibit random walker behavior, whereas on larger length scales (>100 Å) due to domain-wall repulsion originating from the anisotropy in the surface stress tensor a deviation from this one-dimensional random-walk behavior is observed. We have determined a value of 0.13±0.04eV/(1×1) cell for the stress anisotropy.
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Copyright:© 1999 The American Physical Society
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