Very High Frequency Absorption in Superconductors
Very High Frequency Absorption in Superconductors
复制标题
超导体中的甚高频吸收
DOI：
10.1103/physrev.101.1431
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发表时间：
1956
期刊：
影响因子：
--
通讯作者：
M. Buckingham
中科院分区：
文献类型：
--
作者：
M. Buckingham
对超导锡中毫米波吸收的ECENT测量已经表明，温度Tn，也就是说，吸收偏离正常状态时的温度，偏离转变温度Tp，这是本说明的目的是表明，这种依赖关系直接从电子能级谱中的间隙的概念，超导体特别地，对于典型的二级跃迁的差距对温度的依赖性，Tp-Tn ~ co '，当Tp-Tn &（Tp.如图1所示，对于tinfu 161，这种关系在其实验误差范围内。如果认为超导机制是合作性质的，导致基态电子能谱中宽度为ep的能隙，则其宽度e在有限温度下将减小，最终在转变温度Tp处消失。正常状态被认为是能量
ECENT measurements' of the absorption of milli-meter waves in superconducting tin have shown that the temperature T „, say, at which the absorption departs from that in the normal state, divers from the transition temperature Tp, by an amount strongly dependent on the frequency co. It is the purpose of this note to show that such a dependence follows immediately from the concept of a gap in the electron energy level spectrum of a super-conductor. In particular, for the gap dependence on temperature typical of a second-order transition, Tp—T „~ co', when Tp—T „& (Tp. The results' for tin fu161 this relation within their experimental error, as shown in Fig. 1.If the mechanism responsible for superconductivity is supposed of a cooperative nature, leading to a gap of width ep in the electron energy spectrum in the ground state, its width, e, at finite temperatures will decrease, eventually vanishing at the transition temperature, Tp. The normal state is regardedas one in which the energy