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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Superconductivity in nickel-based 112 systems.

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Summary
This summary is machine-generated.

Newly discovered infinite-layer nickelates (R1-xA xNiO2) offer a new platform for studying high-temperature superconductivity. Research explores their electronic structures, magnetic excitations, and potential pairing symmetries.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Superconductivity Research

Background:

  • Recent discovery of superconductivity in infinite-layer nickel-based 112 thin films (R1-x A xNiO2).
  • These materials are isostructural to cuprates and possess a formal Ni 3d^9 valence.
  • They present a novel system for investigating unconventional pairing mechanisms in high-temperature superconductors.

Purpose of the Study:

  • To provide a comprehensive overview of recent research progress on superconducting nickelate systems.
  • To explore both experimental and theoretical findings.
  • To discuss potential pairing symmetries in these novel Ni-based 112 systems.

Main Methods:

  • Review of experimental findings on electronic structures and magnetic excitations.
  • Analysis of theoretical studies on phase diagrams and superconducting gaps.
  • Comparative study with isostructural cuprate superconductors.

Main Results:

  • Detailed examination of electronic structures in R1-x A xNiO2 films.
  • Characterization of magnetic excitations and their relation to superconductivity.
  • Analysis of phase diagrams and superconducting gap properties.

Conclusions:

  • Infinite-layer nickelates represent a significant advancement in superconductivity research.
  • Further investigation into electronic and magnetic properties is crucial.
  • Open discussions on possible pairing symmetries are essential for understanding these materials.