Zero-bias conductance peak splitting due to multiband effect in tunneling spectroscopy

Details Zero-bias conductance peak splitting due to multiband effect in tunneling spectroscopy Zero-bias conductance peak splitting due to multiband effect in tunneling spectroscopy

2003-06-22

arxiv.org/abs/cond-mat/0306551v1

Physics

Condensed Matter

Superconductivity

7 pages, 7 figures

Scientific paper

10.1103/PhysRevB.68.214513

We study how the multiplicity of the Fermi surface affects the zero-bias peak in conductance spectra of tunneling spectroscopy. As case studies, we consider models for organic superconductors $\kappa$-(BEDT-TTF)$_2$Cu(NCS)$_2$ and (TMTSF)$_2$ClO$_4$. We find that multiplicity of the Fermi surfaces can lead to a splitting of the zero-bias conductance peak (ZBCP). We propose that the presence/absence of the ZBCP splitting is used as a probe to distinguish the pairing symmetry in $\kappa$-(BEDT-TTF)$_2$Cu(NCS)$_2$.

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