I. INTRODUCTIONFrom the reflection-absorption spectra, Raman spectra and fluorescence spectra etc. of Y-Ba-Cu-O high T_c superconductor, much information concerning the structure of energy band, the density of states ...I. INTRODUCTIONFrom the reflection-absorption spectra, Raman spectra and fluorescence spectra etc. of Y-Ba-Cu-O high T_c superconductor, much information concerning the structure of energy band, the density of states and the electron-phonon coupling strength has been obtained. The discovery of Bi-Sr-Ca-Cu-O system indicates a new direction for the re-展开更多
1 Introduction Substitution is an important approach to the research on mechanism of high-T<sub>c</sub>superconductivity and properties of superconducting materials. Due to the complexity ofBi-based compos...1 Introduction Substitution is an important approach to the research on mechanism of high-T<sub>c</sub>superconductivity and properties of superconducting materials. Due to the complexity ofBi-based compositions, most of the substitutional experiments have been carried out at theBi site and the Ca site of Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>x</sub>, and a few at the Cu site. In the Bi<sub>2</sub>Sr<sub>2</sub>Ca<sub>1-x</sub>展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘I. INTRODUCTIONFrom the reflection-absorption spectra, Raman spectra and fluorescence spectra etc. of Y-Ba-Cu-O high T_c superconductor, much information concerning the structure of energy band, the density of states and the electron-phonon coupling strength has been obtained. The discovery of Bi-Sr-Ca-Cu-O system indicates a new direction for the re-
文摘1 Introduction Substitution is an important approach to the research on mechanism of high-T<sub>c</sub>superconductivity and properties of superconducting materials. Due to the complexity ofBi-based compositions, most of the substitutional experiments have been carried out at theBi site and the Ca site of Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>x</sub>, and a few at the Cu site. In the Bi<sub>2</sub>Sr<sub>2</sub>Ca<sub>1-x</sub>
