On the superconductivity in hole doped cuprates

The superconductivity in hole doped antiferromagnetic cuprates is regarded as the most unsolved problem in present day physics. The superconductivity of antiferromagnetic cuprate doping increases from critical to end point in a parabolic way, depending on the material, transition temperature and superconducting gap. The concept which led to the discovery of superconductivity in the cuprates was the vibronic property of the Jahn-Teller effect. The bipolaron formation is the origin of the formation of hole-rich regions, by attracting additional holes through elastic coupling forces. The classical superconductors of metallic or intermetallic kind all shows type symmetry of their superconducting macroscopic wavefunction.