Thermopower anisotropy of highly underdoped and slightly overdoped RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals
Thermopower anisotropy of highly underdoped and slightly overdoped RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals
复制标题
高度欠掺杂和轻微过掺杂RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}单晶的热功率各向异性
DOI：
10.1103/physrevb.57.1231
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
W. Sadowski
中科院分区：
文献类型：
--
作者：
C. Sułkowski;T. Plackowski;W. Sadowski
The thermoelectric power (S) for a series of RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (R=Y,Gd,Dy) single crystals were measured in the ab plane and along the c direction. The doping level of these crystals changes from highly underdoped (T{sub c}=44 K), through optimally doped (T{sub c}=90 K) to slightly overdoped (T{sub c}=88 K). Both S{sub ab} and S{sub c} change linearly with the doping level, but S{sub ab} reverses its sign near the optimal doping stoichiometry, as it was observed for polycrystalline materials, whereas S{sub c} remains positive for the whole series. In contrast to the results of electrical resistivity, the anisotropy of S was found to decrease with both increasing oxygen deficiency and decreasing temperature. A brief overview of thermopower results for single crystals of various high-temperature superconducting families is also presented. {copyright} {ital 1998} {ital The American Physical Society}
The thermoelectric power (S) for a series of RBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (R=Y,Gd,Dy) single crystals were measured in the ab plane and along the c direction. The doping level of these crystals changes from highly underdoped (T{sub c}=44 K), through optimally doped (T{sub c}=90 K) to slightly overdoped (T{sub c}=88 K). Both S{sub ab} and S{sub c} change linearly with the doping level, but S{sub ab} reverses its sign near the optimal doping stoichiometry, as it was observed for polycrystalline materials, whereas S{sub c} remains positive for the whole series. In contrast to the results of electrical resistivity, the anisotropy of S was found to decrease with both increasing oxygen deficiency and decreasing temperature. A brief overview of thermopower results for single crystals of various high-temperature superconducting families is also presented. {copyright} {ital 1998} {ital The American Physical Society}