原子スケールでのマグネト・シーベックトンネリング
Cody Friesen1, Hermann Osterhage2, Johannes Friedlein2
1Department of Physics, University of Hamburg, Jungiusstrasse 11A, 20355 Hamburg, Germany. cfriesen@physnet.uni-hamburg.de skrause@physnet.uni-hamburg.de.
まとめ
研究者は,磁気シーベックトンネリングを使用して,原子スケールでスピン解析シーベック係数をマッピングした. スピントロニクスのための新型スピン検出器を動かすことができます.
科学分野:
- 凝縮物質物理学
- 材料科学
- スピントロニクス
背景:
- 電子のスピン輸送はスピントロニクスにとって不可欠です.
- スピン輸送の熱制御は活発な研究分野です.
- 磁気トンネル接続はスピントロニック装置の重要な構成要素です.
研究 の 目的:
- マグネト・シーベックトンネルの 原子スケールの詳細を 実験的に調査する
- 原子解像度でスピン解像度シーベック係数をマッピングする.
- スピントロニクスの応用のための新しいスピン検出器を提案する.
主な方法:
- 磁気サンプルの近くにある磁気探査機の先端を利用した.
- 磁気トンネルの交差点に温度グラデーションを適用した.
- サンプルのスピンテクスチャをスキャンする際に測定された熱力.
- 原子スケールの横断解像度マッピングを達成しました.
主要な成果:
- マグネト・シーベック・トンネリングを 原子スケールで実証した
- 高空間解像度でマッピングされたスピン解像度シーベック係数.
- スピンの情報を熱グラデーションで電圧に変換することを示した.
結論:
- マグネト・シーベック・トンネリングは,スピン極化電子輸送の 原子スケールの洞察を提供します.
- 廃棄熱で動かす新しいスピン検出器が提案されています.
- この技術は,エネルギー効率の良いスピントロニクスに潜在的に応用できます.
関連する概念動画
Atomic Structure
208.6K
Overview
208.6K
Atomic Mass
70.0K
Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...
70.0K
Atomic Orbitals
43.7K
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.
43.7K
Hybridization of Atomic Orbitals I
66.6K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
66.6K
The Energies of Atomic Orbitals
30.1K
In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.
30.1K
pH Scale
79.4K
Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
79.4K


