TY  - JOUR
AU  - Yu, D.
AU  - Bonzel, D. I.
AU  - Scheffler, M.
TI  - Orientation-dependent surface and step energies of Pb from first principles
JO  - Physical review / B
VL  - 74
IS  - 11
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-49539
SP  - 115408
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - The orientation-dependent surface energies of 35 low-index and vicinal Pb surface orientations, located in the [001], [(1) over bar 10], and [01 (1) over bar] zones, have been calculated by density-functional theory within the local-density approximation. The highest surface energy anisotropies in these zones are at the (210), (110), and (311) directions. Surface relaxation decreases the surface energy anisotropy significantly. For misorientations smaller than 12 degrees the (projected) surface energy in a given zone increases linearly with step density, while curvature is found at higher misorientations, indicative of repulsive step-step interactions. These results are fully consistent with the orientation-dependent surface energy predicted by the statistical mechanics of the terrace-step-kink model of vicinal surfaces. The step formation energies and surface and step relaxation energies are derived and analyzed. There is good agreement with available experimental data. The calculated surface energies in eV/atom correlate linearly with the number of broken surface bonds. Deviations from perfect linearity are found to be essential for a proper description of the equilibrium crystal shape of Pb.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000240872300106
DO  - DOI:10.1103/PhysRevB.74.115408
UR  - https://juser.fz-juelich.de/record/49539
ER  -