Resolving the order parameter of high- T c superconductors through quantum pumping spectroscopy

  title={Resolving the order parameter of high- T c superconductors through quantum pumping spectroscopy},
  author={Colin Benjamin},
  journal={Physical Review B},
The order parameter of high-${T}_{c}$ superconductors through a series of experiments has been quite conclusively demonstrated to not be of the normal $s$-wave type. It is either a pure ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$-wave type or a mixture of a ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$-wave with a small imaginary $s$-wave or ${d}_{xy}$-wave component. In this work a distinction is brought out among the four types (i.e., $s$-wave, ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$-wave, ${d}_{{x}^{2… 
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