Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Tunneling Spectroscopy of Non-Oxide Perovskite Superconductor MgCNi3
View through CrossRef
We report the tunneling spectroscopy of non-oxide perovskite superconductor MgCNi3 polycrystals using a low-temperature scanning tunneling microscope. The obtained tunneling spectra clearly show a superconducting energy gap structure, which can be well fitted by the BCS function with smearing parameter Γ. The value of the superconducting gap Δ is estimated to be 1.10–1.15 meV at 3 K, resulting in a ratio of 2Δ/k
B
T
c=3.3–3.4 for T
c of 7.8 K. This result suggests that MgCNi3 is a conventional BCS s-wave superconductor in the weak-coupling regime.
Title: Tunneling Spectroscopy of Non-Oxide Perovskite Superconductor MgCNi3
Description:
We report the tunneling spectroscopy of non-oxide perovskite superconductor MgCNi3 polycrystals using a low-temperature scanning tunneling microscope.
The obtained tunneling spectra clearly show a superconducting energy gap structure, which can be well fitted by the BCS function with smearing parameter Γ.
The value of the superconducting gap Δ is estimated to be 1.
10–1.
15 meV at 3 K, resulting in a ratio of 2Δ/k
B
T
c=3.
3–3.
4 for T
c of 7.
8 K.
This result suggests that MgCNi3 is a conventional BCS s-wave superconductor in the weak-coupling regime.
Related Results
Enabling Continuous Processing of Perovskite Solar Cells
Enabling Continuous Processing of Perovskite Solar Cells
The perovskite solar cell since its introduction in 2010 has received a great deal of attention with efficiencies exceeding 20%, the highest for a solution deposited device. This i...
Investigation of Degradation of Organometal Halide Perovskite Film and Solar Cell
Investigation of Degradation of Organometal Halide Perovskite Film and Solar Cell
Organometal hybrid perovskite material has emerged as an attractive competitor in the field of photovoltaics due to its promising potential of low-cost and high-efficiency photovol...
First-principles calculations on the superconductivity and magnetism of doping MgCNi3
First-principles calculations on the superconductivity and magnetism of doping MgCNi3
We use the first-principles method to calculate the electronic band structures of MgCNi3. The calculated results show that the hybridization between C 2p and Ni 3d electron orbits ...
Recent advances in planar heterojunction organic-inorganic hybrid perovskite solar cells
Recent advances in planar heterojunction organic-inorganic hybrid perovskite solar cells
The development of highly efficient and low-cost solar cells is the key to large-scale application of solar photovoltaic technology. In recent years, the solution-processed organic...
A study of Y–Ba–Cu–O/Si interfaces by x-ray photoelectron spectroscopy
A study of Y–Ba–Cu–O/Si interfaces by x-ray photoelectron spectroscopy
Thin films (∼300 Å) of the superconductor YBa2Cu3O7−y were deposited on a Si 〈100〉 substrate by molecular beam epitaxy. The sample was then cleaved in two pieces and one of these w...
Research progress of hydrogen tunneling in two-dimensional materials
Research progress of hydrogen tunneling in two-dimensional materials
One-atom-thick material such as graphene, graphene derivatives and graphene-like materials, usually has a dense network lattice structure and therefore dense distribution of electr...
Development of Solution-Processed Perovskite Semiconductors Lasers
Development of Solution-Processed Perovskite Semiconductors Lasers
Lead halide perovskite is a new photovoltaic material with excellent material characteristics, such as high optical absorption coefficient, long carrier transmission length, long c...
Interface engineering approaches for efficient and robust perovskite solar cells
Interface engineering approaches for efficient and robust perovskite solar cells
The field of perovskite photovoltaics has been witnessing a surge of interest over the past few years across the breadth of advanced nanomaterials, nanoscience and nanotechnology. ...