How dopant enhances the superconductivity of BSCCO

[ralden]

Good day! i really need your help, I want to know the effect of Dopant (for Example Manganese) in BSCCO (for example Bi-2212) on it's Resistivity? i read some articles saying it increases the critical temperature of the superconductor, But it didn't explain why, and how is that related to the resistivity when you increase the dopant content? Thank you!

 

[_coyote_]

The effect of dopants on the resistivity of a superconductor depends on the type of dopant being used. Generally, dopants are added to increase the critical temperature (Tc) of a material. In the case of BSCCO (Bi-2212), it has been found that doping with manganese can increase the Tc up to 40K or more. This is due to the fact that manganese atoms substitute for copper atoms in the lattice structure of Bi-2212 and act as an electron donor. This increases the number of free electrons available, which in turn increases the conductivity and lowers the resistivity of the material. Therefore, when the dopant content of a BSCCO sample is increased, its resistivity will decrease.