Electron-phonon interactions cause HTSC
10 October 2001
What is the microscopic interaction responsible for high temperature superconductivity (HTSC)? Here data on temporal relaxation of T-c and the room temperature conductivity in YBa2Cu3O6+x after abrupt alteration by light pulses or pressure changes are analyzed. The analysis proves, independently of microscopic details, that only electron-phonon interactions can cause HTSC in the cuprates; all other dynamical interactions are excluded by experiment.