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kanato
- 415
- 1
Can anyone explain or give online references that give some explanation of what d-wave superconductivity is? My (poor) understanding of it is limited to the symmetry of the gap in the first brillouin zone is such that there are 4 nodes. But does that mean there are places where the gap is negative? And what does that even mean, to have a negative gap (energy must be invested to create a pair??) ?