INVESTIGATION OF 2-WELL POTENTIAL OF THE APEX OXYGEN IN YBA2CU2O7-X CRYSTALS BY RAMAN-SPECTROSCOPY

被引：9

作者：

GASPAROV, LV ^{[1
]}

KULAKOVSKII, VD ^{[1
]}

TIMOFEEV, VB ^{[1
]}

SHERMAN, EY ^{[1
]}

机构：

[1] MOSCOW PHYS TECH INST,DOLGOPRUDNYI 141700,RUSSIA

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1995年 / 8卷 / 01期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTORS; RAMAN SCATTERING; APEX OXYGEN; 2-WELL POTENTIAL;

D O I：

10.1007/BF00732237

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dependence of oxygen modes intensity on pump power and temperature in YBa2Cu3O7-x single crystals with different oxygen contents (0 < x < 1) has been measured. When YBa2Cu3O(6.5) crystals are heated, the peak intensity of the 500-cm(-1) band (apex oxygen) decreases, that of the 590-cm(-1) band (''defect'' mode) increases, and the peak intensity of the 330-cm(-1) band (plain oxygen) remains unchanged. The resonant dependence of the apex oxygen, and the intensity of the ''defect'' modes have also been measured. In order to explain the experimental results we suppose that the apex oxygen ion is in a double-well potential.

引用

页码：27 / 29

页数：3

共 8 条

[1] EVIDENCE FOR AN AXIAL OXYGEN-CENTERED LATTICE FLUCTUATION ASSOCIATED WITH THE SUPERCONDUCTING TRANSITION IN YBA2CU3O7 [J].