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Post Closed as "Duplicate" by Tobias Fünke, Matt Hanson, Vincent Thacker
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Tobias Fünke
Tobias Fünke
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cleaning up some grammar
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edit approved Jul 23 at 18:47
DanielFBest
edit approved Jul 23 at 18:47
DanielFBest
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I am learning about BCS theory and how Cooper pairs are formed. They have opposite k$k$ and opposite spin. But what I do not understand is why cooperCooper pairs don't break up on their own. I have pictures like this to get an idea.:

picture shows attractive interaction between two electrons within a crystal lattice

But if one electron has $k$$k,$ and the other electron has a momentum $-k$,$-k,$ does this mean they move in different directiondirections in real space? How can the interaction be attractive if so?

It seems like I am missing something here. Maybe you can explain how cooperCooper pairs can move in the same direction but have opposite momentum $k$?

I am learning about BCS theory and how Cooper pairs are formed. They have opposite k and opposite spin. But what I do not understand is why cooper pairs don't break up on their own. I have pictures like this to get an idea.

picture shows attractive interaction between two electrons within a crystal lattice

But if one electron has $k$ and the other electron has a momentum $-k$, does this mean they move in different direction in real space? How can the interaction be attractive if so?

It seems like I am missing something here. Maybe you can explain how cooper pairs can move in the same direction but have opposite momentum $k$?

I am learning about BCS theory and how Cooper pairs are formed. They have opposite $k$ and opposite spin. But what I do not understand is why Cooper pairs don't break up on their own. I have pictures like this to get an idea:

picture shows attractive interaction between two electrons within a crystal lattice

But if one electron has $k,$ and the other electron has a momentum $-k,$ does this mean they move in different directions in real space? How can the interaction be attractive if so?

It seems like I am missing something here. Maybe you can explain how Cooper pairs can move in the same direction but have opposite momentum $k$?

res. recom. qs can usually not be mixed wth an actual physics q
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Qmechanic ♦
Qmechanic ♦
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Cooper-Pairs: opposite k$k$ but electrons moving in the same direction in real space?

I am learning about BCS theory and how Cooper pairs are formed. They have opposite k and opposite spin. But what I do not understand is why cooper pairs don't break up on their own. I have pictures like this to get an idea.   

picture shows attractive interaction between two electrons within a crystal lattice

But if one electron has k$k$ and the other electron has a momentum -k$-k$, does this mean they move in different direction in real space? How can the interaction be attractive if so?

It seems like I am missing something here. Maybe you can explain how cooper pairs can move in the same direction but have opposite momentum k or you can provide a good source.$k$?

Cooper-Pairs: opposite k but electrons moving in the same direction in real space?

I am learning about BCS theory and how Cooper pairs are formed. They have opposite k and opposite spin. But what I do not understand is why cooper pairs don't break up on their own. I have pictures like this to get an idea.  picture shows attractive interaction between two electrons within a crystal lattice

But if one electron has k and the other electron has a momentum -k, does this mean they move in different direction in real space? How can the interaction be attractive if so?

It seems like I am missing something here. Maybe you can explain how cooper pairs can move in the same direction but have opposite momentum k or you can provide a good source.

Cooper-Pairs: opposite $k$ but electrons moving in the same direction in real space?

I am learning about BCS theory and how Cooper pairs are formed. They have opposite k and opposite spin. But what I do not understand is why cooper pairs don't break up on their own. I have pictures like this to get an idea. 

picture shows attractive interaction between two electrons within a crystal lattice

But if one electron has $k$ and the other electron has a momentum $-k$, does this mean they move in different direction in real space? How can the interaction be attractive if so?

It seems like I am missing something here. Maybe you can explain how cooper pairs can move in the same direction but have opposite momentum $k$?

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Lie
Lie
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