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首页> 外文会议>International Advanced School 'Leonardo Da Vinci' on Superconducting Materials: Advances in Technology and Applications, 1998 Summer Course, Bologna-Italy >More or less equilibrium: properties in the so-called normal state of high-T_c superconductors
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More or less equilibrium: properties in the so-called normal state of high-T_c superconductors

机译：或多或少的平衡：高T_c超导体在所谓的常态下的特性

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摘要

The electrical resistivity, thermoelectric power and thermal conductivity probe the charge and heat currents caused by the electric and temperature gradients. In the following biased review, some emphasis is put on the temperature region encompassing the critical temperature, i.e. roughly extending from the percolation temperature to the onset superconductivity temperature for High T_c Superconductors. Some analysis of the specific heat data is harder to make, but it is shown that in all cases background (or so-called normal state) contributions should be well known before extracting physical parameters, explaining features and deciding upon order parameter symmetry properties and the like. In one appendix, some Hall effect feature is presented as a measure of some carrier concentration. A weak anomaly at rather high temperature can be explained in terms of a gap opening, or superconductivity onset. In a second appendix, the oxygen tracer diffusion coefficient is shown to be anomalous in YBCO at such a high temperature (ca. 2.5 T_c) as well.
机译：电阻率，热电功率和热导率探测由电和温度梯度引起的电荷和热电流。在以下有偏见的评论中，着重强调了包含临界温度的温度区域，即，对于高T_c超导体，其范围从渗透温度大致扩展到了开始的超导温度。对比热数据进行一些分析比较困难，但结果表明，在所有情况下，在提取物理参数，解释特征并确定阶次参数对称性和特性之前，应先了解背景（或所谓的常态）贡献。喜欢。在一个附录中，提出了一些霍尔效应特征来衡量某些载流子浓度。可以通过间隙开口或超导性开始来解释相当高温度下的弱异常。在第二个附录中，在如此高的温度（约2.5 T_c）下，示踪剂的氧示踪剂扩散系数在YBCO中也是异常的。

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