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arXiv 2503.17954cond-mat.mtrl-sci
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基于铁电HfO₂的具有多热导率态的高效电可切换非易失性热晶体管

High-Efficiency Electrically Switchable Nonvolatile Thermal Transistor with Multiple Thermal Conductivity States Based on Ferroelectric HfO2

Yong-Kun Huo, Hui-Feng Feng, Chao Yao, Zhong-Xiao Song, Zhi-Xin Guo

AI总结:

针对纳米级热逻辑电路缺乏高效可控非易失性热晶体管的问题,本研究利用铁电o-HfO₂薄膜结合分子动力学模拟与机器学习势,实现四种可逆热导率态,2%应变下开关比达171%,为热逻辑电路发展提供新路径。

摘要:

尽管纳米级电子逻辑电路已发展成熟,但纳米级热逻辑电路的进展缓慢,主要原因是缺乏高效可控的非易失性场效应热晶体管。本研究提出一种新方法,利用铁电正交晶相二氧化铪(o-HfO₂)薄膜实现电可切换的非易失性场效应热晶体管。通过分子动力学模拟与机器学习势函数,我们证明24 nm厚的o-HfO₂薄膜可呈现四种不同的可逆热导率态。值得注意的是,在2%拉伸应变下,这些态的最大开关比可达171%。研究结果凸显了铁电材料尤其是o-HfO₂通过实现电场控制的多个稳定热导率态,在推动热逻辑电路发展方面的潜力。

英文摘要:

While nanoscale electronic logic circuits are well-established, the development of na-noscale thermal logic circuits has been slow, mainly due to the absence of efficient and controllable nonvolatile field-effect thermal transistors. In this study, we introduce a novel approach that leverages ferroelectric orthorhombic hafnium dioxide (o-HfO2) thin films to achieve electrically switchable nonvolatile field-effect thermal transistors. Using molecular dynamics simulations and machine learning potentials, we demonstrate that a 24 nm o-HfO2 film can exhibit four distinct, reversible states of thermal conductivity. Notably, these states achieve a maximum switching ratio of 171% under 2% tensile strain. Our results underscore the potential of ferroelectric materials, particularly o-HfO2, in advancing thermal logic circuits by enabling multiple, stable thermal conductivity states controlled by electric fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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