Scanning tunneling microscope studies on the atomic structures in NdBa2Cu3O7-δ single crystals

M. Nishiyama, N. Chikumoto, Masato Murakami, K. Ogawa

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Atomic and electronic structures of the cuprate NdBa2Cu3O7-δ, which is processed by the oxygen-controlled-melt-growth (OCMG) method, have been studied by scanning tunneling microscopy/spectroscopy (STM/STS). Two characteristic microstructures, namely, island and striped structures have been observed, the latter for the first time. The former is a well-known pinning center in OCMG Nd123. The islands are of a couple of tens of nanometers in size and are found to be less conductive than the embedding matrix. Three types of stripes, namely, regular, spotted and irregularly spaced ones, have been observed. The stripe consists of lines of bright contrast and of a few atom rows running parallel to and between the neighboring lines of bright contrast. The striped band is more conductive than the matrix. The striped and flat bands of a couple of tens of nanometers wide each are found to be arranged alternately. We suggest the striped structure to be a good candidate for another strong pinning center in OCMG Nd123.

Original languageEnglish
Pages (from-to)251-258
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Volume335
Issue number1
DOIs
Publication statusPublished - 2000 Jun
Externally publishedYes

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Crystal atomic structure
atomic structure
Microscopes
microscopes
Single crystals
Oxygen
Scanning
scanning
single crystals
oxygen
Scanning tunneling microscopy
matrices
embedding
cuprates
Electronic structure
scanning tunneling microscopy
Spectroscopy
electronic structure
Atoms
microstructure

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Scanning tunneling microscope studies on the atomic structures in NdBa2Cu3O7-δ single crystals. / Nishiyama, M.; Chikumoto, N.; Murakami, Masato; Ogawa, K.

In: Physica C: Superconductivity and its Applications, Vol. 335, No. 1, 06.2000, p. 251-258.

Research output: Contribution to journalArticle

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