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Superconductivity pdf notes by Joe Khachan and Stephen Bosi download free
Ravi Chopra

Superconductivity pdf notes by Joe Khachan and Stephen Bosi download free

Ravi Chopra | 15-Jun-2016 |
The discovery of superconductors ,

Hi friends, here Ravi Chopra uploaded notes for Superconductivity with title Superconductivity pdf notes by Joe Khachan and Stephen Bosi download free. You can download this lecture notes, ebook by clicking on the below file name or icon.

Superconductivity
by Joe Khachan and Stephen Bosi 

The discovery of superconductors 
The phenomenon of superconductivity, in which the electrical resistance of certain materials completely vanishes at low temperatures, is one of the most interesting and sophisticated in condensed matter physics. It was first discovered by the Dutch physicist Heike Kamerlingh Onnes, who was the first to liquefy helium (which boils at 4.2 Kelvin at standard pressure). In 1911 Kamerlingh Onnes and one of his assistants discovered the phenomenon of superconductivity while studying the resistance of metals at low temperatures. They studied mercury because very pure samples could easily be prepared by distillation.  
The historic measurement of superconductivity in mercury is shown in Figure 1. As in many other metals, the electrical resistance of mercury decreased steadily upon cooling, but dropped suddenly at 4.2 K, and became undetectably small. Soon after this discovery, many other elemental metals were found to exhibit zero resistance when their temperatures were lowered below a certain characteristic temperature of the material, called the critical temperature.

 

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