1D-ACAR Spectra of YBa2－xSrxCu3Oy

ZHOU Xian-Yi; ZHANG Han; YUAN Song-Liu; WANG Shun-Xi; ZHU Jing-Sheng; ZHANG Qi-Rui

Chinese Physics C> 1991, Vol. 15> Issue(11) : 961-965

1D-ACAR Spectra of YBa_2－xSr_xCu₃O_y

International Center for Materials Physics Academia Sinica,Shenyang 110015 and Department of Modern Physics,University of Science and Technology of China,Hefei 2300262 Department of Physics,Peking University,Beijing 1008713 Institute of Plasma Physics,Academia,Sinica,Hefei 2300314 Department of Modern Physics,University of Science and Technology of China,Hefei 2300265 Department of Physics,Zhejiang University,Hangzhou 310027

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Abstract：
The measurements of one-dimensional angular correlation of positron annihilation radiation (1D-ACAR) spectra,superconducting critical temperature,lattice parameters and oxygen contents have been made on YBa_2－xSr_xCu₃O_y high temperature supercnductor system.It was found that the substitution of Sr for Ba weakens the orthorhombic symmery,suppresses T_C,hardly changes oxygen content and does not disturb the electronic structure of Cu-O chains.Based on the above results.the authors propose that the localized electronic structure of Cu-O plane is a dominating factor for high temperature superconductivity in 1:2:3 phase superconductors.

References

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ZHOU Xian-Yi, ZHANG Han, YUAN Song-Liu, WANG Shun-Xi, ZHU Jing-Sheng and ZHANG Qi-Rui. 1D-ACAR Spectra of YBa_2－xSr_xCu₃O_y[J]. Chinese Physics C, 1991, 15(11): 961-965.

ZHOU Xian-Yi, ZHANG Han, YUAN Song-Liu, WANG Shun-Xi, ZHU Jing-Sheng and ZHANG Qi-Rui. 1D-ACAR Spectra of YBa_2－xSr_xCu₃O_y[J]. Chinese Physics C, 1991, 15(11): 961-965. shu

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Received: 1900-01-01
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沈阳化工大学材料科学与工程学院沈阳 110142

1D-ACAR Spectra of YBa_2－xSr_xCu₃O_y

Corresponding author: ZHOU Xian-Yi,

International Center for Materials Physics Academia Sinica,Shenyang 110015 and Department of Modern Physics,University of Science and Technology of China,Hefei 2300262 Department of Physics,Peking University,Beijing 1008713 Institute of Plasma Physics,Academia,Sinica,Hefei 2300314 Department of Modern Physics,University of Science and Technology of China,Hefei 2300265 Department of Physics,Zhejiang University,Hangzhou 310027

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 1991-11-05

Abstract: The measurements of one-dimensional angular correlation of positron annihilation radiation (1D-ACAR) spectra,superconducting critical temperature,lattice parameters and oxygen contents have been made on YBa_2－xSr_xCu₃O_y high temperature supercnductor system.It was found that the substitution of Sr for Ba weakens the orthorhombic symmery,suppresses T_C,hardly changes oxygen content and does not disturb the electronic structure of Cu-O chains.Based on the above results.the authors propose that the localized electronic structure of Cu-O plane is a dominating factor for high temperature superconductivity in 1:2:3 phase superconductors.

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1D-ACAR Spectra of YBa_2－xSr_xCu₃O_y

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1D-ACAR Spectra of YBa_2－xSr_xCu₃O_y

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