相关实验视频

Updated: Jun 18, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

低密度超冷水中铁电特征的证据来自ab initio深度神经网络模拟

Cesare Malosso¹, Natalia Manko², Maria Grazia Izzo¹

¹Scuola Internazionale Superiore di Studi Avanzati, Trieste 34136, Italy.

Proceedings of the National Academy of Sciences of the United States of America

|July 31, 2024

概括

超冷水表现出两个液态相,低密度相显示出显著的双极波动. 这种转变是由分子旋转跳跃和电子极化性的变化驱动的.

科学领域:

物理化学物理化学
计算物理计算物理
材料科学材料科学材料科学

背景情况:

有证据表明,超冷水中存在一个转移稳定的液体-液体临界点.
两种不同的液态相 (高密度和低密度) 可以并存.
了解水的异常行为在各种科学领域至关重要.

研究的目的:

为了研究超冷水低密度液相的动态特性.
探索高密度和低密度液态水之间的过渡背后的分子机制.
为了确定第二个临界点的潜在介电式探针.

主要方法:

使用了长时间的分子动力学模拟.
在量子力学数据上训练有素的深度神经网络力场.
分析了集体双极波动和分子旋转动力学.

主要成果:

低密度的液态相表现出强烈的自发偏振与大,长期存在的集体双极波动.
过渡到低密度阶段是由集体旋转角度跳跃触发的.
电子极化性的微小变化会影响不同阶段的分子旋转移动性.

结论:

低密度液相的动态稳定性与集体分子重定向和双极波动有关.
这些发现提供了关于水中液体-液体临界点的性质的见解.
这项研究为开发介电探头铺平了道路,以检测水中的第二个临界点.

关键词:

铁电机电机电机电机电机电机液态液态阶段过渡的过渡过程.机器学习是机器学习.水水水的水水的水

更多相关视频

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

相关概念视频

Intermolecular Forces

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...