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Related Concept Videos

Superconductor01:24

Superconductor

1.3K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.3K
Types Of Superconductors01:28

Types Of Superconductors

1.2K
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...
1.2K
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.5K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
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Types of Semiconductors01:20

Types of Semiconductors

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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
986
Ferromagnetism01:31

Ferromagnetism

2.5K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.5K
Metallic Solids02:37

Metallic Solids

19.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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Updated: Oct 1, 2025

Author Spotlight: A Rapid, Microwave-Assisted Hydrothermal Synthesis Of Nickel Hydroxide Nanosheets
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Superconductivity in infinite-layer nickelates.

Yusuke Nomura1, Ryotaro Arita1,2

  • 1RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

Reports on Progress in Physics. Physical Society (Great Britain)
|March 3, 2022
PubMed
Summary
This summary is machine-generated.

Superconductivity in nickelates RNiO2 offers new insights into high-temperature superconductivity mechanisms. Comparing these materials to cuprates may unlock future advancements in correlated electron systems.

Keywords:
infinite-layer nickelatesstrongly-correlated materialssuperconductivity

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Area of Science:

  • Solid State Physics
  • Materials Science
  • Condensed Matter Physics

Background:

  • The discovery of superconductivity in doped infinite layer nickelates (RNiO2) is significant due to their structural similarity to cuprates (Ca, Sr)CuO2.
  • Cuprates exhibit high superconducting transition temperatures (around 110 K), making nickelates a promising new class of materials for superconductivity research.

Purpose of the Study:

  • To review experimental and theoretical studies on the newly discovered nickelate superconductors.
  • To explore the commonalities and differences between nickelates and cuprates to gain insight into high-temperature superconductivity mechanisms.
  • To discuss future research directions for superconductivity in nickel-based materials.

Main Methods:

  • Literature review of experimental findings.
  • Analysis of theoretical models and simulations.
  • Comparative study of nickelate and cuprate properties.

Main Results:

  • Nickelates RNiO2 (R = La, Pr, Nd) exhibit superconductivity.
  • Structural analogy between RNiO2 and (Ca, Sr)CuO2 suggests potential for high critical temperatures.
  • Ongoing research aims to elucidate the underlying mechanism of superconductivity in these correlated electron systems.

Conclusions:

  • The study of nickelate superconductors is crucial for understanding high-temperature superconductivity.
  • Further research is needed to fully characterize nickelates and their potential applications.
  • The 'nickel age' of superconductivity holds promise for future scientific breakthroughs.