Article
Physics, Condensed Matter
Shany Mary Oommen, Lorenzo Fallarino, J. Heinze, Olav Hellwig, Simone Pisana
Summary: We systematically analyzed the influence of 5 nm thick metal interlayers inserted at the interface of different metal-dielectric systems. Our results show that the parameters that most influence interface transport are the electron-phonon coupling strength and the maximum phonon frequency. This study provides guidance for selecting materials for thermal interface engineering.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Jingjing Shi, Chao Yuan, Hsien-Lien Huang, Jared Johnson, Chris Chae, Shangkun Wang, Riley Hanus, Samuel Kim, Zhe Cheng, Jinwoo Hwang, Samuel Graham
Summary: This study investigates thermal transport at beta-Ga2O3/metal interfaces using theoretical modeling and experimental measurements. It highlights the significant impact of metal cutoff frequency on thermal boundary conductance, followed by chemical reactions and defects. Different metals show varying effects on the thermal boundary conductance in these interfaces.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Qinshu Li, Fang Liu, Song Hu, Houfu Song, Susu Yang, Hailing Jiang, Tao Wang, Yee Kan Koh, Changying Zhao, Feiyu Kang, Junqiao Wu, Xiaokun Gu, Bo Sun, Xinqiang Wang
Summary: This study reveals that even for materials with similar Debye temperatures, a significant portion of phonons can transport inelastically across interfaces at high temperatures, greatly enhancing the interface thermal conductance. The sharpness of the interface strongly affects the phonon transport process. These findings provide new insights and opportunities for engineering interface thermal conductance in microelectronics materials.
NATURE COMMUNICATIONS
(2022)
Article
Thermodynamics
Wentao Chen, Gyoko Nagayama
Summary: Recent studies have shown that phonons transfer heat more efficiently than photons in nanoscale vacuum gaps, and phonon heat transfer can be induced by quasi-Casimir coupling. The heat flux across the vacuum gap increases exponentially as the gap distance decreases.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Applied
Yijun Ge, Yanguang Zhou, Timothy S. Fisher
Summary: This study combines first-principles calculations, spin-lattice dynamics, and NEGF method to compute thermal boundary conductance at a three-dimensional Co-Cu interface, considering spin-lattice interactions. It is found that spin-wave transmission is low and interfacial thermal conductance is reduced. The results are compared to the NEGF method, showing a similar trend with spins included.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Jing Zhou, Kunming Yang, Bihuan Yang, Boan Zhong, Songsong Yao, Youcao Ma, Jian Song, Tongxiang Fan, Dawei Tang, Jie Zhu, Yue Liu
Summary: As a typical two-dimensional material, graphene has high in-plane thermal conductivity but low interface thermal conductance with metals, limiting its effectiveness in thermal management. This study investigates the interfacial electron behaviors between hydrogenation-treated graphene and nickel nanofilms. The results show that a larger interface thermal conductance can be obtained when the layer number is low, possibly reaching a peak value at a certain layer number.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Jing Zhou, Kunming Yang, Bihuan Yang, Boan Zhong, Songsong Yao, Youcao Ma, Jian Song, Tongxiang Fan, Dawei Tang, Jie Zhu, Yue Liu
Summary: Graphene has great potential for thermal management applications due to its high thermal conductivity. However, the low interface thermal conductance between graphene and metals limits its effective heat dissipation. In this study, the interfacial electron behaviors were investigated by comparing hydrogenation-treated graphene with pure graphene, and the effect of graphene layer numbers on the interfacial thermal conductance was systematically studied. The results showed that a larger interfacial thermal conductance can be obtained with lower layer numbers.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Thermodynamics
Yi Zeng, Jianjun Dong, J. M. Khodadadi
Summary: This study reveals a thermal coupling-decoupling mechanism across molecular interfaces, providing new insights for modeling thermal transport properties and guiding research on potential phase change materials for thermal energy storage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Hengrui Yang, Weitang Li, Jiajun Ren, Zhigang Shuai
Summary: This study proposes a nearly exact method to evaluate the time-dependent current and occupation number in a molecular junction with strong electron-phonon coupling. The oscillation period and amplitude of the current are found to be dependent on the electron-phonon coupling strength and energy level alignment. A new approximation is introduced to explain the bistability phenomenon and steady currents in the strong electron-phonon coupling regime, and comparisons are made with other methods. The entropy of different orderings is also explored, and the thermal Bogoliubov transformation is used for finite-temperature analysis.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Multidisciplinary Sciences
Philipp Kurzhals, Geoffroy Kremer, Thomas Jaouen, Christopher W. Nicholson, Rolf Heid, Peter Nagel, John-Paul Castellan, Alexandre Ivanov, Matthias Muntwiler, Maxime Rumo, Bjoern Salzmann, Vladimir N. Strocov, Dmitry Reznik, Claude Monney, Frank Weber
Summary: Electron-phonon coupling is a common phenomenon in solids, leading to emergent ground states such as superconductivity. This study demonstrates that strong phonon broadening can occur in the absence of Fermi surface nesting or lattice anharmonicity, if electron-phonon coupling is enhanced for specific electron momenta. The findings suggest a new mechanism for understanding phonon anomalies in materials.
NATURE COMMUNICATIONS
(2022)
Article
Thermodynamics
Wuli Miao, Moran Wang
Summary: This study investigates thermal transport in metal/semiconductor multilayer films using the coupled electron and phonon Boltzmann transport equations combined with the phonon diffuse mismatch model. The importance of electron-phonon coupling transport and the critical thickness of the metal layer for considering this transport are demonstrated. The research findings provide insight into the manipulation of thermal conductivity in multilayers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Gen Lin, Lan Jiang, Pengfei Ji
Summary: A two-temperature model with a metal-nonmetal interface is used to investigate the heat transfer across metal-nonmetal interfaces during femtosecond laser processing of thin metal films. Inserting an interlayer and reducing the interfacial thermal resistance enhance heat transfer. This affects temperature distributions and also impacts the thermal reflectivity detection and laser processing of thin metal films.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Zhun-Yong Ong
Summary: The study shows that at graphene grain boundaries, backward scattering is more diffuse than forward scattering, supporting the hypothesis that separate specularity parameters are needed to describe transmitted and reflected phonons. This sheds new light on how surfaces and interfaces modify phonon transport within and between domains in nanostructured materials.
Article
Chemistry, Multidisciplinary
Xinglin Xiao, Yali Mao, Biwei Meng, Guoliang Ma, Kristina Husekova, Fridrich Egyenes, Alica Rosova, Edmund Dobrocka, Peter Elias, Milan Tapajna, Filip Gucmann, Chao Yuan
Summary: Different phases of Ga2O3 have distinct thermal transport properties. The thermal conductivity (TC) of alpha-Ga2O3 is larger than that of beta and kappa-Ga2O3, while the TC of bulk alpha and beta-Ga2O3 are similar. The thermal boundary conductance (TBC) at the Ga2O3/sapphire interface shows phase-dependence. This study provides insight into the phonon transport mechanism and contributes to the thermal management of Ga2O3-based devices.
Article
Chemistry, Multidisciplinary
Jingjing Wang, Ziyang Wang, Kunming Yang, Naiqi Chen, Jiamiao Ni, Jian Song, Quan Li, Fangyuan Sun, Yue Liu, Tongxiang Fan
Summary: Interfacial thermal resistance plays a critical role in heat dissipation. This study investigates the influence of interface defects on phonon scattering and finds that inelastic phonon scattering may greatly promote interfacial heat transport. The findings provide insights into nanoscale heat transport mechanisms at metal/nonmetal interfaces.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Jiaxin Li, Ying Li, Pei-Chao Cao, Minghong Qi, Xu Zheng, Yu-Gui Peng, Baowen Li, Xue-Feng Zhu, Andrea Alu, Hongsheng Chen, Cheng-Wei Qiu
Summary: The reciprocity principle governs the symmetry in transmission of electromagnetic and acoustic waves, as well as the diffusion of heat. Recent interest in materials with time-modulated properties has shown efficient breaking of reciprocity for various forms of diffusion. However, time modulation may not be a viable approach to break thermal reciprocity. Our theoretical framework and experimental demonstration highlight the generally preserved nature of thermal reciprocity in dynamic materials.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Gazendra Shakya, Tao Yang, Yu Gao, Apresio K. Fajrial, Baowen Li, Massimo Ruzzene, Mark A. Borden, Xiaoyun Ding
Summary: This study demonstrates the manipulation of internal structure of disk-in-sphere endoskeletal droplets using acoustic wave. The authors developed a model to investigate the physical mechanisms behind this phenomenon and found that the disk orientation can be adjusted reversibly with the frequency of the acoustic driving. This dynamic behavior may provide a pathway for directed assembly of novel hierarchical colloidal architectures and intracellular organelles or intra-organoid structures.
NATURE COMMUNICATIONS
(2022)
Review
Physics, Multidisciplinary
Jie Chen, Xiangfan Xu, Jun Zhou, Baowen Li
Summary: Interfacial thermal resistance (ITR) is a major obstacle for heat transfer between materials, and understanding it is crucial for efficient heat dissipation in electronic and photonic devices, batteries, etc. This comprehensive review examines ITR, focusing on theoretical, computational, and experimental developments over the past 30 years. It covers fundamental theories, computational methods, and experimental tools for probing ITR, as well as challenges and opportunities in studying nanoscale and atomic scale interfaces.
REVIEWS OF MODERN PHYSICS
(2022)
Article
Chemistry, Physical
Shenshen Yan, Yi Wang, Fang Tao, Jie Ren
Summary: Thermal conductivity is a crucial property for various applications, and accurately estimating it is expensive and time-consuming. In this study, we develop an efficient method to estimate the phonon thermal conductivity based on the correlation between elastic properties and thermal conductivity. Our method is validated by calculating the thermal conductivity of 226 inorganic materials and comparing the results with experimental measurements. The results suggest the potential application of this method in material discovery and understanding the phonon-elasticity-thermal relationship.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Physics, Multidisciplinary
Jinfeng Zhao, Chenwen Yang, Weitao Yuan, Danmei Zhang, Yang Long, Yongdong Pan, Hong Chen, Zheng Zhong, Jie Ren
Summary: This study reports the observation of local elastic valley spin and the previously overlooked hidden elastic spin-valley locking mechanism. By controlling the elastic spin, the direction of valley phonon state transmission along the interface can be reversed. This discovery offers a new tool for exploring topological metamaterials.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Hongyi Ouyang, Yuanqing Gu, Zhibin Gao, Lei Hu, Zhen Zhang, Jie Ren, Baowen Li, Jun Sun, Yan Chen, Xiangdong Ding
Summary: In this study, nitrogen-doped porous graphene metamaterials on the nanoscale are designed using a topological kirigami assembly, with a thermal-switching ratio of 27.79, which is more than double the value of previous work. The excellent performance is attributed to the chiral folding-unfolding deformation, resulting in a metal-insulator transition. This research provides a nanomaterial design paradigm that bridges the gap between kinematics and functional metamaterials, motivating the development of high-performance thermal regulators.
PHYSICAL REVIEW APPLIED
(2023)
Editorial Material
Chemistry, Multidisciplinary
Baowen Li, Jianfang Wang, Tao Deng
Article
Chemistry, Multidisciplinary
Brendan McBennett, Albert Beardo, Emma E. Nelson, Begon Abad, Travis D. Frazer, Amitava Adak, Yuka Esashi, Baowen Li, Henry C. Kapteyn, Margaret M. Murnane, Joshua L. Knobloch
Summary: Nanostructuring allows control over heat flow in semiconductors, but bulk models are limited by boundary effects and first-principles calculations are computationally expensive. We use extreme ultraviolet beams to study phonon transport in a nanostructured silicon metalattice and observe reduced thermal conductivity. We develop a predictive theory that explains this behavior based on nanoscale confinement effects.
Article
Physics, Applied
Yang Long, Chenwen Yang, Hong Chen, Jie Ren
Summary: This paper explores the geometric relations between acoustic spin, energy flux, and reactive power, revealing hidden locking relations and providing valuable insights into the fundamental principles underlying the relationship between these quantities in acoustics.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Changyong Lei, Jie Ren
Summary: This paper presents a complete theory of phonon lasers and emphasizes the importance of the previously ignored optomechanical interaction. The optomechanical interaction is equivalent to a Kerr nonlinear interaction and enhances phonon lasing. Experimental results confirm the validity of the theory and provide new possibilities for manipulating optomechanical phonon lasers.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Yuanyang Du, Jiebin Peng, Zhong Shi, Jie Ren
Summary: We investigate the control of near-field radiative heat transfer between two hyperbolic antiferromagnetic insulators by twist and magnetic fields. The heat flux can be affected by both the twist angle and the magnetic field magnitude, with different symmetries. External magnetic fields cause a nonmonotonic change in the radiative heat flux, with a minimum flux at around 1.5T. This behavior is due to the field changing the nature of magnon polaritons with time-reversal symmetry breaking. We propose a twist-induced thermal switch device that can regulate radiative heat flux through different magnetic fields, with implications for efficient thermal management.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Weitao Yuan, Jinfeng Zhao, Yang Long, Xiaoqing Zhang, Jie Ren, Zheng Zhong
Summary: In this study, we investigate two types of topological edge states (TES) on valley phononic crystal (PC) plates, which exhibit backscattering immunity and pseudospin-dependent phonon transport. Through simulations and experiments, we observe the transversely symmetric and antisymmetric properties of these TES by studying the displacement distribution. By using a simplified mass-spring model, we explain the theoretical origin of these properties, which involve the phase difference caused by the periodicity of the PC plate and the phase difference between sites p and q in the unit cell. Our findings enhance the understanding of TES and open up possibilities for designing mechanical devices or controlling wave propagation in phonon circuits.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Condensed Matter
Dan Huang, Jinxing Zhong, Saqlain Raza, Ran Niu, Baishan Fu, Dapeng Yu, Tsuneyoshi Nakayama, Jun Liu, Jun Zhou
Summary: In this work, the thermal conductivities of normal liquid helium-4 (He I) and helium-3 were calculated using the thermal resistance network model. The predicted values are not only in good agreement with the measurements, but also reproduce the experimental trend of thermal conductivity increasing with temperature and pressure.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Jinxin Zhong, Hong Sun, Yang Pan, Zhiguo Wang, Xiangfan Xu, Lifa Zhang, Jun Zhou
Summary: A nonzero mean value of phonon angular momentum (PAM) can be generated in chiral materials with a temperature gradient. By using the Kubo formula, we investigated the contributions of both intraband and interband terms of PAM to the mean PAM. Interestingly, the interband term was found to be equally important as the intraband term, indicating the strong influence of quantum transition between different phonon branches induced by a temperature gradient on local atomic rotation. This discovery introduces an alternative mechanism for generating PAM and phonon magnetic moments.
Article
Physics, Fluids & Plasmas
Zi Wang, Jiangzhi Chen, Jie Ren
Summary: This study reveals the geometric heat pump effect in macroscopic driven thermal diffusion and analyzes the geometric curvature and no-pumping restriction theorems in driven systems. The predicted pumped heat is experimentally observed, providing a theoretical foundation for designing and implementing nonreciprocal and topological diffusive systems.
