圧力誘発ドーム型の超伝導性とTh2Cu4As5における異常な電荷密度波のような移行
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
PubMedで要約を見る
まとめ
この要約は機械生成です。高圧はTh<sub>2</sub>Cu<sub>4</sub>As<sub>5</sub>における複雑な電子状態を明らかにする. 超伝導性は電荷密度波 (CDW) によって強化され,高圧で新しいCDW状態が生まれます.
科学分野
- 凝縮物質物理学
- 材料科学
- 固体化学
背景
- Th<sub>2</sub>Cu<sub>4</sub>As<sub>5</sub>の材料は,超伝導性と電荷密度波 (CDW) の両方を表している.
- これらの現象は,異なる構造単位から生じ,その相互作用を研究するためのユニークなプラットフォームを提供します.
研究 の 目的
- 高圧下におけるTh<sub>2</sub>Cu<sub>4</sub>As<sub>5</sub>におけるCDWと超伝導性の進化を調査する.
- 圧力誘発CDW状態と超伝導性の関係を探求する.
主な方法
- 高圧電気輸送の測定
- 高圧X線偏光測定
主要な成果
- 超伝導性は,最初はCDW抑制によって強化され,その後は減少し,ドームのような振る舞いを示します.
- 異常なCDW状態を示す新しい2 × 2 × 5のスーパーグリッドが8GPa以上で出現します.
- この新しいCDW状態は,超伝導性の突然の喪失と一致します.
結論
- Th<sub>2</sub>Cu<sub>4</sub>As<sub>5</sub>は圧力下での多用途CDW状態を表示する.
- この発見は,複数の電子的秩序状態の相互作用を研究するための珍しい機会を提供します.
関連する概念動画
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...
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...
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
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...
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...