J. Paraszczak, J.M. Shaw, et al.
Micro and Nano Engineering
Scanning tunneling microscopy is used to study the surface structural and electronic properties of cleaved single crystals of Bi2.15Sr1.7CaCu2O8+ Images with atomic resolution reveal atomic chains with sinusoidal modulations running along the perovskite cell axis with a periodicity of 9 to 10 unit cells. These atomic chains stack along the b direction with a translational vector of one unit, resulting in an incommensurate periodicity of about 4.75 units along the a direction. In contrast to other reports, no evidence of missing Bi-atom rows is found. Spectroscopic studies show zero density of states at the Fermi level, implying that the surface Bi-O layer is nonmetallic. © 1989 The American Physical Society.
J. Paraszczak, J.M. Shaw, et al.
Micro and Nano Engineering
Zelek S. Herman, Robert F. Kirchner, et al.
Inorganic Chemistry
Heinz Schmid, Hans Biebuyck, et al.
Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
C.M. Brown, L. Cristofolini, et al.
Chemistry of Materials