Physics – Condensed Matter – Superconductivity
Scientific paper
1997-09-08
Physics
Condensed Matter
Superconductivity
10 pages, 11 eps figures, J.Phys.Soc.Jpn.67,No.9(1998)
Scientific paper
10.1143/JPSJ.67.3224
Tunneling conductance spectra of normal metal/insulator/triplet superconductor junctions are investigated theoretically. As triplet paring states we select several types of symmetries that are promising candidates for the superconducting states in UPt$_{3}$ and in Sr$_{2}$RuO$_{4}$. The calculated conductance spectra are sensitive to the orientation of the junction which reflects the anisotropy of the pairing states. They show either zero-bias conductance peaks or gap-like structures depending on the orientation of the junctions. The existence of a residual density of states, peculiar to nonunitary states, is shown to have a significant influence on the properties of the conductance spectra. Present results serve as a guidefor the experimental determination of the symmetry of the pair potentials in UPt$_{3}$ and Sr$_{2}$RuO$_{4}$.
Kashiwaya Satoshi
Tanaka Yukio
Tanuma Yasunari
Yamashiro Masashi
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