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関連する概念動画

Phase Transitions02:31

Phase Transitions

19.1K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.1K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

11.7K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
11.7K
Molecular Spectroscopy: Absorption and Emission01:14

Molecular Spectroscopy: Absorption and Emission

4.1K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
4.1K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

3.0K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
3.0K
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

2.3K
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
2.3K
Phase Transitions01:21

Phase Transitions

108
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
108

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Updated: May 3, 2026

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

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単一分子量子ドットにおける量子相移行

Nicolas Roch1, Serge Florens, Vincent Bouchiat

  • 1Institut Néel, CNRS and Université Joseph Fourier, BP 166, 38042 Grenoble cedex 9, France.

Nature
|May 30, 2008
PubMed
まとめ
この要約は機械生成です。

研究者は,単一分子量子ドットで量子批判性を探求し,ユニークな磁気相変化を観察しました. この発見は,強く相関するシステムと分子スピントロニクスに関する新しい洞察を提供します.

さらに関連する動画

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

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関連する実験動画

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Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

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科学分野:

  • 量子物理学とは,量子物理学のことです.
  • 凝縮物質物理学 凝縮物質物理学
  • マテリアルサイエンス 材料科学

背景:

  • 量子批判性は,競合する量子基本状態の間の継続的な進化を記述し,しばしば磁気相変化と関連付けられています.
  • 重フェルミオン化合物や超伝導体などの強く相関するシステムは,量子批判性によって支配される複雑な性質を示します.
  • 人工ナノスケールデバイスは,複雑な散発材料と比較して,量子相変遷を研究するためのより単純なプラットフォームを提供します.

研究 の 目的:

  • 単一分子量子ドットにおける量子批判性を実証する.
  • 分子システムにおける量子相変換の制御と調節性を調査する.
  • 分子スピントロニクスの新しい方向性を探求するためです.

主な方法:

  • コンド政権で運用されていた単一分子量子ドットを用いて.
  • シングレットとトリプルエレクトロンのスピン状態の交差を誘導し,磁場ゼロのゲート電圧を使用します.
  • ゲート電圧の調節によって量子磁気相変化を達成する.

主要な成果:

  • 単一分子量子ドットで実証された量子批判的行動.
  • 異なるコンド・レジーム間の新しい量子磁気相変化を観測した.
  • ゲート電圧制御によるスピン状態とコンド体制の調節性を示した.

結論:

  • 単一分子量子ドットは,量子批判性を研究するための簡素化されたシステムを提供します.
  • 観測されたトランジションは,他の量子ドットで以前に研究されたコンドのトランジションとは異なる.
  • この研究は,分子スピントロニクスにおける高度な制御と調節性の道を開きます.