Erratum: Structural analysis of the intermetallic surface compound ${\mathrm{CePt}}_5/\mathrm{Pt}\left(111\right)$ [Phys. Rev. B 90, 195401 (2014)]

Figure 1

Pristine Pt(111). Arrows mark the crystallographic directions. (a) LEED image obtained at a primary electron energy $E_{\mathrm{p}}=63$ eV. The missing spot in the lower left is covered by the electron gun. (b) STM topography showing three atomically flat terraces separated by two monoatomic step edges (scan parameters: $U=+1.0$ V, $I=300$ pA). (c) Atomic resolution image as obtained on a defect-free surface area ($U=+1.0$ mV, $I=90$ nA). The corresponding FT is shown in the inset.

Figure 2

2 u.c. ${\mathrm{CePt}}_5$ on Pt(111). (a) LEED pattern ($E_{\mathrm{p}}=63$ eV) and (b) large-scale STM topography showing structures B, C, the nonperiodic (np) structure, and a minority surface reconstruction m (scan parameters: $U=+1.0$ V, $I=300$ pA). (c) High-resolution differential conductance map and (d) the FT of structure B. The superstructure pattern and the lattice of ${\mathrm{CePt}}_5/\mathrm{Pt}\left(111\right)$ are marked in blue and green, respectively.

Figure 3

3 u.c. ${\mathrm{CePt}}_5$ on Pt(111). (a) LEED image ($E_{\mathrm{p}}=63$ eV) and (b) STM image of a surface dominated by structure C. Minor surface areas display structure B and the np structure (black). The inset shows the surface of an atomically flat terrace with domain walls (some of which are highlighted by white lines) oriented along the $\langle 1\overline{1}0\rangle$ directions of the Pt(111) substrate (scan parameters: $U=+1.0$ V, $I=300$ pA). (c) High-resolution image and (d) its FT with blue and green marks illustrating the superstructure and the atomic lattice of ${\mathrm{CePt}}_5/\mathrm{Pt}\left(111\right)$, respectively. Note that the atomic lattice is rotated by ${30}^{\circ }$ relative to Pt(111). The moiré pattern forms a $(3\sqrt{3}\times 3\sqrt{3})R{30}^{\circ }$ superstructure of the atomic lattice as highlighted by the (1,1) and (2,2) spots (marked by black arrows). The (3,3) spot (white arrow) coincides with the (1,0) spot of the intermetallic film.

Figure 4

(a) LEED image ($E_{\mathrm{p}}=63$ eV) and (b) STM topography of a 3 u.c. ${\mathrm{CePt}}_5$ intermetallic film on Pt(111). The surface is almost completely covered with structure C which is highlighted by a bright tone in (b). The inset shows a rendered three-dimensional representation of the surface area within the box. (c) At 3.75 u.c. ${\mathrm{CePt}}_5$ the surface fraction covered by structure C has decreased significantly. This is compensated by a larger fraction of the surface being covered by structure $C^{\prime }$ (dark tone). (d) and (e) show an STM image and the LEED pattern of 4.5 u.c. ${\mathrm{CePt}}_5/\mathrm{Pt}\left(111\right)$ which are dominated by structure $C^{\prime }$.

Figure 6

LEED patterns of ${\mathrm{CePt}}_5$ films grown on Pt(111) with thickness (a) $t=7$ u.c., (b) 8 u.c., and (c) 10 u.c. ($E_{\mathrm{p}}=50$ eV). Note the rotation by ${30}^{\circ }$. (d) and (e) show the simultaneously recorded topographic STM image and differential conductance map, respectively, of a 10 u.c. ${\mathrm{CePt}}_5$ film (scan parameters: $U=+1.0$ V, $I=300$ pA, $U_{\mathrm{mod}}=10$ mV). Structures $C^{\prime }$ and D are separated by domain boundaries. The black arrow marks a minority structure of the surface and the white arrow points to a dislocation line. (f) and (g) High-resolution (left panel) and corresponding FT images (right) acquired on structures $C^{\prime }$ and D, respectively ($U=+1.0$ V, $I=300$ pA). In either case blue and green marks indicate the moiré pattern and the ${\mathrm{CePt}}_5$ unit cell, respectively.