Theory of SIS tunnelling in cuprates

We show that the single-particle polaron Green's function describes SIS tunnelling in cuprates, including the absence of Ohm's law at high voltages, the dip/hump features in the first derivative of the current, a substantial incoherent spectral weight beyond quasiparticle peaks and unusual...

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Bibliographic Details
Main Authors: A.S. Alexandrov, Chanun Sricheewin
Format: Default Preprint
Published: 2001
Subjects:
Other physical sciences not elsewhere classified
superconductivity
Physical Sciences not elsewhere classified
Online Access:https://hdl.handle.net/2134/1145
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Summary:We show that the single-particle polaron Green's function describes SIS tunnelling in cuprates, including the absence of Ohm's law at high voltages, the dip/hump features in the first derivative of the current, a substantial incoherent spectral weight beyond quasiparticle peaks and unusual shape of the peaks. The theory allows us to determine the characteristic phonon frequencies, normal and superconducting gaps, impurity scattering rate, and the electron-phonon coupling from the tunnelling data.

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