Asked by: ram Subject: superconductivity Question: why cooper paired electrons are not repeling each other? --------------------------------------------------------------------- Visitor Ip: 172.16.80.253
cooper pair formation is an indirect interaction,which proceeds when one electron interacts with the lattice and deforms it.a second electron sees the deformed lattice and adjusts itself to take advantage of the deformation to lower its energy.thus the second electron interacts with first electron via lattice deformation.this interaction overcomes the coulombic repulsion between the electrons and thus the net interaction is attractive.
cooper pair formation can also be explained as follows ...........an electron is attracted by a positive charge at the lattice and deforms the lattice in its vicinity ,exciting a phonon that travels through the crystal.this phonon is absorbed by a second electron ,getting thus coupled to the first electron.so it is a electron-lattice-electron (electon-phonon-electron)interaction."an indirect interaction "
cooper pair formation is an indirect interaction,which proceeds when one electron interacts with the lattice and deforms it.a second electron sees the deformed lattice and adjusts itself to take advantage of the deformation to lower its energy.thus the second electron interacts with first electron via lattice deformation.this interaction overcomes the coulombic repulsion between the electrons and thus the net interaction is attractive.