TY  - JOUR
AB  - The LiNbO3(2 (11) over bar0) surface, commonly referred to as X-cut, is investigated by means of atomic force microscopy and first-principles calculations. Atomically resolved atomic force microscopy images show geometrical patterns not compatible with truncated bulk terminations. Fast Fourier transformation of the real-space images shows an oblique surface unit cell with lattice parameters of a = 0.75 +/- 0.02 nm, b = 0.54 +/- 0.02 nm, and alpha = 94.8 degrees. Comparing these experimental results with the theoretical models of stable surface terminations provides clear evidence for the formation of a -Li-12 termination. The LN X-cut is, thus, characterized by a nonstoichiometric and Li-enriched composition. An analysis of the surface electronic charge indicates that the atomic force microscopy contrast is governed by the charge accumulation at the oxygen ions.
DA  - 2014
DO  - 10.1103/PhysRevB.89.075403
LA  - eng
IS  - 7
M2  - 75403
PY  - 2014
SN  - 1098-0121
SP  - 75403-
T2  - Physical Review B
TI  - Unraveling the LiNbO3 X-cut surface by atomic force microscopy and density functional theory
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29137957
Y2  - 2024-11-22T04:40:53
ER  -