• DOI:10.1103/PhysRevB.71.174512
• Corpus ID: 119371828

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

@article{Benjamin2005ResolvingTO,
  title={Resolving the order parameter of high- T c superconductors through quantum pumping spectroscopy},
  author={Colin Benjamin},
  journal={Physical Review B},
  year={2005},
  volume={71},
  pages={174512}
}

• Colin Benjamin
• Published 30 October 2004
• Physics
• 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, ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}+is$-wave, and ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}+i{d}_{xy}$-wave types) with the help of quantum pumping spectroscopy. This involves a normal-metal double-barrier structure in contact with a high-${T}_{c}$ superconductor. The pumped current, heat, and noise show different characteristics with change in order parameter revealing quite easily the differences among these.