Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Superconductor01:24

Superconductor

1.2K
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...
1.2K
Types Of Superconductors01:28

Types Of Superconductors

1.0K
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...
1.0K
Resistivity01:22

Resistivity

3.6K
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
3.6K
Types of Semiconductors01:20

Types of Semiconductors

666
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...
666
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.4K
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,...
1.4K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

1.0K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
1.0K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Superconducting phase diagram of multilayer square-planar nickelates.

Science (New York, N.Y.)·2026
Same author

Freestanding Ordered Intermetallic Nanomembranes Released from Etchable Oxide Templates.

Journal of the American Chemical Society·2026
Same author

Structural modifications in strain-engineered bilayer nickelate thin films.

Nature·2026
Same author

Author Correction: Signatures of ambient pressure superconductivity in thin film La<sub>3</sub>Ni<sub>2</sub>O<sub>7</sub>.

Nature·2026
Same author

Selective Magnetic Field Generation Method for Effective Manipulation of Two-Dimensional Magnetic Microrobots Using a Triad of Electromagnetic Coils.

Micromachines·2026
Same author

Giant Magnetostriction in Ferrimagnetic SmFe<sub>5</sub>As<sub>3</sub>.

Angewandte Chemie (International ed. in English)·2026

関連する実験動画

Updated: Jul 23, 2025

Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
11:07

Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties

Published on: August 15, 2015

9.9K

最適な超伝導 (Nd,Sr) NiO2のための温度における線形抵抗性

Kyuho Lee1,2, Bai Yang Wang3,4, Motoki Osada3,5

  • 1Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA. kyuho@stanford.edu.

Nature
|July 12, 2023
PubMed
まとめ

研究者は欠陥のない無限層のニケラートを合成し,銅酸化物と同様の正常状態の性質を明らかにしました. この進歩はニケラートにおける超伝導性を高め,これらの超伝導体ファミリー間の収束を示唆しています.

さらに関連する動画

Writing and Low-Temperature Characterization of Oxide Nanostructures
06:43

Writing and Low-Temperature Characterization of Oxide Nanostructures

Published on: July 18, 2014

10.1K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

9.7K

関連する実験動画

Last Updated: Jul 23, 2025

Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
11:07

Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties

Published on: August 15, 2015

9.9K
Writing and Low-Temperature Characterization of Oxide Nanostructures
06:43

Writing and Low-Temperature Characterization of Oxide Nanostructures

Published on: July 18, 2014

10.1K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

9.7K

科学分野:

  • 凝縮物質物理学
  • 材料科学
  • 超伝導性

背景:

  • 強く相関する相の近くの超伝導性は,新興現象を理解する鍵です.
  • 層状のニケラートは超伝導性を有望に示していますが,材料の限界は研究を妨げています.
  • 無限層のニケラートフィルムの欠陥は輸送測定を複雑にする.

研究 の 目的:

  • 無限層のニッケラートに 材料の限界を克服するために
  • 欠陥のないニケラートの正常状態の性質を調査する.
  • ニッケラートにおける欠陥と超伝導性の関係を理解するために

主な方法:

  • 新しい基板 ((LaAlO3) 0.3 ((Sr2TaAlO6) 0.7) 上に合成されたNd1-xSrxNiO2薄膜.
  • 拡張された欠陥から本質的に自由な合成を達成しました.
  • 欠陥を最小化したニケラート系で輸送測定を行った.

主要な成果:

  • 欠陥のないニッケレートは,ドーピングレベルによって異なる正常状態の抵抗性行動 (上昇,線形,二次) を表します.
  • 電子構造の違いにもかかわらず,銅酸化物との現象学的類似性を観察した.
  • 超伝導的移行温度とドーピング範囲を欠陥最小化したニケラートで強化した.

結論:

  • ニッケラートにおける還元障害は,銅酸化物と収束する電子特性を明らかにする.
  • この新しい基板は,無限層のニケラートの高品質の合成を可能にします.
  • これらの発見は,ニッケラート超伝導性をより深く理解するための道を開きます.