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Updated: Feb 13, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Spectroscopic evidence for two-gap superconductivity in the quasi-1D chalcogenide Nb2Pd0.81S5
Eunsung Park1, Sangyun Lee1, Filip Ronning2
1Department of Physics, Center for Quantum Materials and Superconductivity (CQMS) and Sungkyunkwan University, Suwon 16419, Republic of Korea.
Abstract:
Low-dimensional electronic systems with confined electronic wave functions have attracted interest due to their propensity toward novel quantum phases and their use in wide range of nanotechnologies. The newly discovered chalcogenide Nb2PdS5 possesses a quasi-one-dimensional electronic structure and becomes superconducting. Here, we report spectroscopic evidence for two-band superconductivity, where soft point-contact spectroscopic measurements in the superconducting (SC) state reveal Andreev reflection in the differential conductance G. Multiple peaks in G are observed at 1.8 K and explained by the two-band Blonder-Tinkham-Klapwijk model with two gaps Δ1 = 0.61 meV and Δ2 = 1.20 meV. The progressive evolution of G with temperature and magnetic field corroborates the multiple nature of the SC gaps.
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