Theory of the time-resolved spectral function of high-temperature superconductors with bosonic modes
Jianmin Tao, Jian-Xin Zhu
DOI 10.1103/PhysRevB.81.224506 · Physical Review B
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Abstract
We develop a three-temperature model to simulate the time dependence of the electron and phonon temperatures in high-temperature superconductors displaying strong anisotropic electron-phonon coupling. This model not only takes the tight-binding band structure into account but also is valid in the superconducting state. Based on this model, we calculate the time-resolved spectral function via the double-time Green’s functions. We find that the dip-hump structure evolves with the time delay. More interestingly, an unusual structure is obtained when the phonons are pumped directly. This finding may serve as a direct evidence for electron-vibration mode coupling.
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