TY  - JOUR
AU  - Stasevich, T. J.
AU  - Einstein, T. L.
AU  - Zia, R. K. P.
AU  - Giesen, M.
AU  - Ibach, H.
AU  - Szalma, F.
TI  - Effects on next-nearest-neighbor interactions on the orientation dependence of step stiffness: Reconciling theory with experiment for Cu(001)
JO  - Physical review / B
VL  - 70
IS  - 24
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-43042
SP  - 245404
PY  - 2004
N1  - Record converted from VDB: 12.11.2012
AB  - Within the solid-on-solid (SOS) approximation, we carry out a calculation of the orientational dependence of the step stiffness on a square lattice with nearest- and next-nearest-neighbor interactions. At low temperature our result reduces to a simple, transparent expression. The effect of the strongest trio (three-site, nonpairwise) interaction can easily be incorporated by modifying the interpretation of the two pairwise energies. The work is motivated by a calculation based on nearest neighbors that underestimates the stiffness by a factor of 4 in directions away from close-packed directions, and a subsequent estimate of the stiffness in the two high-symmetry directions alone that suggested that inclusion of next-nearest-neighbor attractions could fully explain the discrepancy. As in these earlier papers, the discussion focuses on Cu(001).
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000226112300087
DO  - DOI:10.1103/PhysRevB.70.245404
UR  - https://juser.fz-juelich.de/record/43042
ER  -