2 research outputs found
Superconductor–Insulator Transition in Quasi-One-Dimensional Single-Crystal Nb<sub>2</sub>PdS<sub>5</sub> Nanowires
Superconductor–insulator
transition (SIT) in one-dimensional
(1D) nanowires attracts great attention in the past decade and remains
an open question since contrasting results were reported in nanowires
with different morphologies (i.e., granular, polycrystalline, or amorphous)
or environments. Nb<sub>2</sub>PdS<sub>5</sub> is a recently discovered
low-dimensional superconductor with typical quasi-1D chain structure.
By decreasing the wire diameter in the range of 100–300 nm,
we observed a clear SIT with a 1D transport character driven by both
the cross-sectional area and external magnetic field. We also found
that the upper critical magnetic field (<i>H</i><sub>c2</sub>) decreases with the reduction of nanowire cross-sectional area.
The temperature dependence of the resistance below <i>T</i><sub>c</sub> can be described by the thermally activated phase slip
(TAPS) theory without any signature of quantum phase slips (QPS).
These findings demonstrated that the enhanced Coulomb interactions
with the shrinkage of the wire diameter competes with the interchain
Josephson-like coupling may play a crucial role on the SIT in quasi-1D
system
Superconductor–Insulator Transition in Quasi-One-Dimensional Single-Crystal Nb<sub>2</sub>PdS<sub>5</sub> Nanowires
Superconductor–insulator
transition (SIT) in one-dimensional
(1D) nanowires attracts great attention in the past decade and remains
an open question since contrasting results were reported in nanowires
with different morphologies (i.e., granular, polycrystalline, or amorphous)
or environments. Nb<sub>2</sub>PdS<sub>5</sub> is a recently discovered
low-dimensional superconductor with typical quasi-1D chain structure.
By decreasing the wire diameter in the range of 100–300 nm,
we observed a clear SIT with a 1D transport character driven by both
the cross-sectional area and external magnetic field. We also found
that the upper critical magnetic field (<i>H</i><sub>c2</sub>) decreases with the reduction of nanowire cross-sectional area.
The temperature dependence of the resistance below <i>T</i><sub>c</sub> can be described by the thermally activated phase slip
(TAPS) theory without any signature of quantum phase slips (QPS).
These findings demonstrated that the enhanced Coulomb interactions
with the shrinkage of the wire diameter competes with the interchain
Josephson-like coupling may play a crucial role on the SIT in quasi-1D
system