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関連する概念動画

Quantum Numbers02:43

Quantum Numbers

50.0K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
50.0K
Atomic Orbitals02:44

Atomic Orbitals

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An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
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The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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The Hall Effect01:30

The Hall Effect

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Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
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Molecular Orbital Theory I02:35

Molecular Orbital Theory I

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Overview of Molecular Orbital Theory
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Molecular Orbital Theory II03:51

Molecular Orbital Theory II

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Molecular Orbital Energy Diagrams
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関連する実験動画

Updated: Jan 31, 2026

Author Spotlight: High-Quality Quantum Dot Nanobeads for Sensitive Fluorescent Lateral Flow Immunoassays
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Cd3As2におけるウェイル軌道に基づく量子ホール効果

Cheng Zhang1,2, Yi Zhang3, Xiang Yuan1,2

  • 1State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China.

Nature
|December 19, 2018
PubMed
まとめ
この要約は機械生成です。

研究者は3次元トポロジカル半金属で新しい量子ホール効果を発見した. この効果はウェイル軌道に基づいていて 質量状態が大量に発生し 量子コンピューティングの研究に 新たな道筋を提供しています

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科学分野:

  • 凝縮物質物理学
  • トポロジカル・マテリアル・サイエンス
  • 量子現象について

背景:

  • トポロジカル・フェーズと量子コンピューティングに不可欠な量子ホール効果は,2次元システムにおける磁場下のキラル・エッジ状態から発生する.
  • 量子ホール物理学を 積み重ねられた2Dシステムを超えて 高次元に拡張することは まだ未解決の課題です

研究 の 目的:

  • 量子ホール効果の可能性を 三次元材料で調査する
  • カドミウムアルセニド (Cd3As2) のようなトポロジカル半金属における新しい量子現象を探求する.

主な方法:

  • 状のカドミウムアルセニド (Cd3As2) ナノ構造の製造
  • 量子相変化とキラルモードを測定する 輸送実験の実施
  • 磁場とサンプル厚さのランдауレベルの依存性を分析する.

主要な成果:

  • 3Dトポロジカル半金属ナノ構造のウェイル軌道に基づく新しい量子ホール効果の証拠.
  • 試料の厚さによって影響される,ウェイル軌道を通過した大量輸送から発生するキラル状態の観測.
  • 実験結果は,リフシッツ-オンサガー関係改変を用いた理論的予測と一致する.

結論:

  • トポロジカル・セミメタル・ナノ構造は3次元量子ホール物理学の探索を可能にします.
  • ウェイル軌道は,大量キラル状態のメカニズムを提供し,量子ホール効果のアプリケーションを拡張します.
  • この研究は,新しい物質の次元における量子ホール物理学の探索のための調整能力を高めます.