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関連する概念動画

Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

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 have a...
Torque01:10

Torque

Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
Frictional Forces on Screws01:17

Frictional Forces on Screws

Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
Gyroscope01:02

Gyroscope

A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

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...
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

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,...

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関連する実験動画

Updated: Jun 5, 2026

Experimental Procedure for Warm Spinning of Cast Aluminum Components
07:36

Experimental Procedure for Warm Spinning of Cast Aluminum Components

Published on: February 1, 2017

実験用のスピンラチェット

Marius V Costache1, Sergio O Valenzuela

  • 1Institut Català de Nanotecnologia (ICN), Centre d'Investigació en Nanociència i Nanotecnologia (CIN2), Campus Universitat Autònoma de Barcelona, Bellaterra, Barcelona E-08913, Spain.

Science (New York, N.Y.)
|December 18, 2010
PubMed
まとめ
この要約は機械生成です。

研究者らは,単一電子のスピンラチェット装置を開発した. この技術革新は,純スピン電流を純電荷輸送なしで生成し,スピントロニクス研究を進めています.

さらに関連する動画

Investigating Motor Skill Learning Processes with a Robotic Manipulandum
07:52

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Published on: February 12, 2017

Method to Measure Tone of Axial and Proximal Muscle
10:41

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

関連する実験動画

Last Updated: Jun 5, 2026

Experimental Procedure for Warm Spinning of Cast Aluminum Components
07:36

Experimental Procedure for Warm Spinning of Cast Aluminum Components

Published on: February 1, 2017

Investigating Motor Skill Learning Processes with a Robotic Manipulandum
07:52

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Published on: February 12, 2017

Method to Measure Tone of Axial and Proximal Muscle
10:41

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

科学分野:

  • スピントロニクス (Spintronics) は,スピントロニクス (Spintronics) を開発したものです.
  • 量子エレクトロニクス 量子エレクトロニクス
  • 凝縮物質物理学 凝縮物質物理学

背景:

  • Spintronicsは,電子のスピンを情報処理に活用し,従来の電荷ベースの電子を補完することを目指しています.
  • 付随する電荷の流れなしに純粋なスピン電流を生成し制御することは,スピントロニクスにおける重要な課題です.

研究 の 目的:

  • 単一電子レベルでの新しいスピンラッチメカニズムを実証する.
  • 純電荷輸送やバイアスなしにスピン電流を生成する.
  • 純粋なスピン電流の生成と操作のための堅牢な方法を提供する.

主な方法:

  • 超伝導アイランドと通常の導線を備えた単電子トランジスタを使用した.
  • 空間対称性を破るために異なる抵抗を持つトンネルバリアを設計した.
  • スピン輸送を証明し,定量化するために,既知のスピン極化を持つ鉄磁導線を使用しました.

主要な成果:

  • 単一の電子レベルでのスピン輸送が成功裏に実証されました.
  • スピンラッチメカニズムの効率を定量化しました.
  • 純電荷輸送なしのスピン電流の観測生成.

結論:

  • 開発されたスピンラッチは,純粋なスピン電流を作成するための実行可能な経路を提供します.
  • この研究は,スピントロニクスに関する基本的な理解と実用的な応用を進めるものです.
  • このデバイスは,将来のスピントロニクスベースの技術のためのプラットフォームを提供します.