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研究领域物理科学原子,分子和光学物理太赫兹物理
在化中高压下异常的热传输

在化中高压下异常的热传输

Suixuan Li ¹, Zihao Qin ¹, Huan Wu ¹, Man Li ¹, Martin Kunz ², Ahmet Alatas ³, Abby Kavner ⁴, Yongjie Hu ⁵

Suixuan Li ¹, Zihao Qin ¹, Huan Wu ¹

¹Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, USA.
²Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
³Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA.
⁴Department of Earth and Space Sciences, University of California, Los Angeles, Los Angeles, CA, USA.
⁵Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, USA. yhu@seas.ucla.edu.

⁰Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, USA.

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2022年十一月23日

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在PubMed上查看摘要

概括

此摘要是机器生成的。

研究人员发现化在高压下表现出异常的导热性, 这一发现揭示了在极端物质环境中超越经典预期的复杂声子物理.

科学领域

凝聚物质物理学
材料科学
高压科学

背景情况

高压为材料的发现提供了独特的条件.
晶体中的晶格导热率通常会随着压力而单调地增加.
之前的研究缺乏在极端压力下实地测量热传输.

研究的目的

研究化的热导率的压力依赖性.
探索在高压下控制热传输的底层声子物理.
在极端条件下验证理论预测.

主要方法

在现场测量高达32千兆帕斯卡的热传输.
超快光学,拉曼光谱和无弹性X射线散射.
原子论和初始计算.

主要成果

在化中观察到异常压力依赖的导热性.
鉴定出具有竞争力的传热通道,因为它们具有高级别的不协调性.
揭示了涉及三声声和四声声散射过程的复杂声声动态.

结论

化具有独特的高压热传输行为.
化中的声子动态偏离了经典模型.
高压光谱与理论相结合对于理解极端材料至关重要.

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相关概念视频

Joule-Thomson Effect

Joule-Thomson Effect

The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...

Thermal Strain

Thermal Strain

Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...

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