STM studies of the surface structure in cleaved Bi2Sr2CuO6+δ single crystals

Shan, L.; Ejov, A.; Volodin, A.; Moshchalkov, V. V.; Wen, H. H.; Lin, C. T.

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STM studies of the surface structure in cleaved Bi₂Sr₂CuO_6+δ single crystals

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Lin, C. T.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Shan, L., Ejov, A., Volodin, A., Moshchalkov, V. V., Wen, H. H., & Lin, C. T. (2003). STM studies of the surface structure in cleaved Bi₂Sr₂CuO_6+δ single crystals. Europhysics Letters, 61(5), 681-687.

Cite as: https://hdl.handle.net/21.11116/0000-000E-E9AF-7

Abstract

Low-temperature scanning tunneling microscopy (STM) was used to
study the Bi-O plane of Bi2Sr2CuO6+delta (Bi-2201) single
crystals cleaved in situ. The atomic-resolution STM images
clearly show a commensurate modulated lattice structure. In
contrast to the previous STM data obtained at room temperature,
the missing atom rows" have been clearly seen at the ridges of
the modulation. By comparing the low-temperature STM images of
Bi-2201 and Bi-2212, we found that the modulation of the Bi-O
plane in these two materials originates from the missing atom
rows. The atomic steps at the surface have also been
investigated at room temperature confirming that most easily
exposed atomic layers in Bi-2201 are Bi-O and Sr-O planes, as
in Bi-2212.