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

Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

912
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
912
Types Of Superconductors01:28

Types Of Superconductors

897
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...
897
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

918
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
918
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

854
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
854
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.0K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the...
1.0K
Superconductor01:24

Superconductor

1.0K
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...
1.0K

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

Probing Moiré Excitons in MoSe<sub>2</sub>/WSe<sub>2</sub> Heterobilayers by Combined Micro-photoluminescence and Lateral Force Microscopy.

Nano letters·2026
Same author

Imaging the flat bands of magic-angle graphene reshaped by interactions.

Nature·2026
Same author

Turning excitons to the dark side.

Nature materials·2026
Same author

Revealing Electron-Electron Interactions in Graphene at Room Temperature with a Quantum Twisting Microscope.

Nano letters·2026
Same author

Visual Predictive Control for Robotics with RBF-EKF Coupled State-Disturbance Estimation and Task-Oriented K-Means Clustering.

Sensors (Basel, Switzerland)·2026
Same author

Optical control over topological Chern number in moiré materials.

Nature·2026

関連する実験動画

Updated: May 16, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.4K

スピン軌道結合二層グラフェンのトウィストプログラム可能な超伝導性

Yiran Zhang1,2,3, Gal Shavit4,5,6, Huiyang Ma7,8

  • 1T. J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA, USA. yzhang7@caltech.edu.

Nature
|May 7, 2025
PubMed
まとめ

研究者が使った

さらに関連する動画

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

9.5K
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
11:42

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

15.4K

関連する実験動画

Last Updated: May 16, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.4K
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

9.5K
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
11:42

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

15.4K

科学分野:

  • 凝縮物質物理学
  • 材料科学
  • 量子材料について

背景:

  • ヴァン・ダー・ワールズの材料の回転角度は,モアール平面帯の鍵です.
  • ねじ角制御は,対称性破裂によって相関状態を安定させることもできます.
  • モイレの超グリッドは ねじ角効果の 唯一のプラットフォームではありません

研究 の 目的:

  • 超伝導性と相関する順序の"モアレス"のトウィストチューニングを実証する.
  • イーシング・スピン・オービタ・カップリング (SOC) がグラフェンの相図に与える影響を調査する.
  • ヴァン・デル・ワールスの異質構造における新しい超伝導状態を探求する.

主な方法:

  • ベルナル二層グラフェンでトングルデセリネドによって近接されたトウィストチューニングを実験的に実証した.
  • 体系的にグラフェンとトラングステン・ディセレニドの配列を変化させた.
  • 異なったIsing SOCの下で超伝導特性と相移行を分析した.

主要な成果:

  • 超伝導性の発生は, 異動性 SOC を増加させたより高い領域に移動した.
  • 超伝導性の臨界温度は0.5Kまで上昇した.
  • 強いイジングSOCの限界における磁場への耐性やネマティック・フェーズ・トランジションを観察した.
  • 超伝導領域が2つ見つかりました 1つにはパウリ制限の違反比率が40を超えています

結論:

  • ヴァン・デル・ワールスのヘテロ構造における相関状態を制御するための強力な方法を提供する.
  • イージングSOCは2層グラフェンの超伝導相図を大きく変化させる.
  • この発見は超クリーンなグラフェン超伝導体と 新しい量子現象の洞察を与えてくれます