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

摘要: We study how the multiplicity of Fermi surface affects zero-bias peak in conductance spectra tunneling spectroscopy. As case studies, we consider models for organic superconductors $\ensuremath{\kappa}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}\mathrm{Cu}(\mathrm{NCS}{)}_{2}$ and $(\mathrm{TMTSF}{)}_{2}{\mathrm{ClO}}_{4}.$ find that surfaces can lead to a splitting (ZBCP). propose presence/absence ZBCP is used as probe distinguish pairing symmetry $\ensuremath{\kappa}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}\mathrm{Cu}(\mathrm{NCS}{)}_{2}.$