Relationship between crystal chemistry and the local structure and electronic properties of Tl2Ba2Ca2Cu3O10 superconductors determined by scanning tunneling microscopy and spectroscopy

Zhe Zhang*, Chia Chun Chen, Charles M. Lieber, Bruno Morosin, David S. Ginley, Eugene L. Venturini

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)

摘要

Scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) have been used to characterize the local structure and electronic properties of Tl2Ba2Ca2Cu3O10 single crystals prepared from 4:1:3:6 and 4:1:3:10 stoichiometry melts. Magnetic-susceptibility, resistivity, x-ray-fluorescence, and x-ray-diffraction measurements indicate that samples prepared from the 4:1:3:6 melts (type 1) have a chemical inhomogeneity, while crystals obtained from the 4:1:3:10 melts (type 2) are high quality. STM studies of the type-1 crystals demonstrate that the inhomogeneities can be associated with distortions in the TlO layer atomic structure. STS measurements on the distorted TlO layer of the type-1 samples have shown that this layer is also metallic. STM and STS investigations of the type-2 samples have shown, however, that the TlO layer in these crystals is tetragonal and semiconducting. In addition, a superstructure that is localized over small regions of the TlO surface has been characterized in the type-1 crystals. These results demonstrate that single crystals of the same average structure and composition can exhibit substantial differences in the local-structure electronic states and superconducting properties.

原文英語
頁(從 - 到)987-992
頁數6
期刊Physical Review B
45
發行號2
DOIs
出版狀態已發佈 - 1992

ASJC Scopus subject areas

  • 凝聚態物理學

指紋

深入研究「Relationship between crystal chemistry and the local structure and electronic properties of Tl2Ba2Ca2Cu3O10 superconductors determined by scanning tunneling microscopy and spectroscopy」主題。共同形成了獨特的指紋。

引用此