English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Within the solid-on-solid (SOS) approximation, we carry out a calculation ofthe orientational dependence of the step stiffness on a square lattice withnearest and next-nearest neighbor interactions. At low temperature our resultreduces to a simple, transparent expression. The effect of the strongest trio(three-site, non pairwise) interaction can easily be incorporated by modifyingthe interpretation of the two pairwise energies. The work is motivated by acalculation based on nearest neighbors that underestimates the stiffness by afactor of 4 in directions away from close-packed directions, and a subsequentestimate of the stiffness in the two high-symmetry directions alone thatsuggested that inclusion of next-nearest-neighbor attractions could fullyexplain the discrepancy. As in these earlier papers, the discussion focuses onCu(001).Comment: 8 pages, 3 figures, submitted to Phys. Rev.

Effects of next-nearest-neighbor interactions on the orientation dependence of step stiffness: Reconciling theory with experiment for Cu(001)