Structure of Co-2 × 2 nanoislands grown on Ag/Ge(111)-√3 × √3 surface studied by scanning tunneling microscopy

Table 1 Geometrical characteristics of low-index Co crystallographic planes in bcc, fcc, and hcp structures.

Crystallographic orientation	Lattice parameters (pm)	Interlayer distance (pm)
Co-fcc(100)	251 × 251	177
Co-fcc(110)	251 × 355	125
Co-fcc(111)	251 × 251	205
Co-hcp(0001)	251 × 251	204
Co-hcp(11-20)	434 × 407	125
Co-hcp(10-10)	251 × 407	72 145
Co-bcc(100)	284 × 284	142
Co-bcc(110)	284 × 402	201
Co-bcc(111)	402 × 402	82 164
Ge(111)	400 × 400	82 245

bcc, body-centered cubic; fcc, face-centered cubic; hcp, hexagonal close-packed; pm, picometer.