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arXiv 1306.4189cond-mat.mes-hall
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Thermoelectric effects与金属点接触电流-电压特性的不对称性

Thermoelectric effects and the asymmetry of the current-voltage characteristics of metallic point contacts

Yu. G. Naidyuk, N. N. Gribov, O. I. Shklyarevskii, A. G. M. Jansen, I. K. Yanson

摘要:

作为电流流动方向的函数的不对称性被观察到的电流-电压特性(CVC)和它的第一和第二导数的点异质接触之间的纯金属(Cu,Ni,Fe),以及这些金属和稀合金(CuFe,CuMn)。它示出,所观察到的不对称性是由热电现象(塞贝克,珀尔帖,和汤普森效应),观察到的接触内的温度时,从浴的温度不同。在低能量范围内(小于德拜能量或德拜能量的量级),CVC的不对称性主要受塞贝克效应的影响,而在高能量和较大的接触(较低的电阻),所有注意到的效应的贡献是相同的数量级。提出了一种通过测量两种极性下的CVC来确定异质接触的温度的技术。它是建立在中间(扩散和弹道之间)的状态飞行的电子通过收缩的异质接触的温度线性增加的电压,和所有更迅速的接触和更多的杂质。

英文摘要:

An asymmetry as a function of the direction of current flow is observed in the current-voltage characteristic (CVC) and its first and second derivatives for point heterocontacts between pure metals {Cu, Ni, Fe) as well as between these metals and dilute alloys (CuFe, CuMn). It is shown that the observed asymmetry is caused by thermoelectrical phenomena (Seebeck, Peltier, and Thompson effects), observed when the temperature inside the contact differs from the temperature of the bath. In the low energy range (less than or of the order of the Debye energy) the asymmetry of the CVC is affected mainly by the Seebeck effect, while at high energies and for larger contacts (lower resistance) the contributions of all noted effects are of the same order of magnitude. A technique is proposed for determining the temperature of a heterocontact by measuring the CVC in two polarities. It is established that in the intermediate (between the diffusion and ballistic) state of flight of the electrons through the constriction the temperature of the heterocontact increases linearly with the voltage on it, and all the more rapidly the larger the contact and the more impurity in it.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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