Article
Physics, Applied
Bernd Gotsmann, Andrea Gemma, Dvira Segal
Summary: This Perspective discusses the concepts, theoretical and experimental progress in the field of quantized phonon transport, with a focus on channels such as molecular systems. It highlights open questions and research opportunities and emphasizes the recent advancements in experimental capabilities.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Jian Zhang, Haochun Zhang, Shuai Chen, Gang Zhang
Summary: This study systematically investigates the phonon localization effect and heat flux regulation using a silicon nanofilm with a periodic array of nanopillars as an example. The results show that the phonon localization effect generated by the nanopillars is mainly concentrated near the surface layer. The effects of nanopillar height, spacing, and atomic mass on the localization are also explored, and the relationship between phonon localization and heat flux density is demonstrated. This research provides valuable insights into the design of nanoscale heat flux regulation devices and a better understanding of the phonon resonance hybridization mechanism in nanophononic metamaterials.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Haoyu Guo, Subir Sachdev
Summary: This study analyzes chiral phonon transport, focusing on the role of non-zero phonon Hall viscosity in inducing thermal Hall conductivity and the influence of impurities on this conductivity. The interference between impurity skew-scattering channels with opposite parity is found to be the dominant source of thermal Hall transport at low temperatures.
Article
Nanoscience & Nanotechnology
Xujun Wang, Quanjie Wang, Xinyu Liu, Zixuan Huang, Xiangjun Liu
Summary: Grain boundaries in black phosphorene have significant effects on thermal boundary resistance and induce high thermal resistances and thermal rectification effects. The localization of phonons and strong phonon boundary scattering at the grain boundary area are found to be responsible for the high thermal resistance. The partial phonon modes exhibit weak localization in the presence of grain boundaries.
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
Physics, Multidisciplinary
Zhongwei Zhang, Yangyu Guo, Marc Bescond, Jie Chen, Masahiro Nomura, Sebastian Volz
Summary: Understanding and quantifying the coherence of thermal excitations is an important problem in physics. The traditional phonon gas model fails to capture this coherence. In this study, a new heat conduction formalism is proposed that combines the phonon gas model and the wave nature of thermal phonons. The theory and simulations reveal two types of coherence in different temperature ranges.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Tim Bernges, Martin Peterlechner, Gerhard Wilde, Matthias T. Agne, Wolfgang G. Zeier
Summary: The reduction of vibrational contributions to thermal transport and the search for materials with low lattice thermal conductivities are crucial in thermoelectric research. Spectral analytical models have been proven effective in understanding the physics of low thermal conduction, but another mechanism called diffusons has been discovered in complex crystalline materials. This work proposes an analytical 2-channel transport model that explains the thermal conductivities of the solid solution series Ag9-xGa1-xGexSe6 and provides materials design metrics for 2-channel thermal transport.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Qiyu Chen, Xiaolu Yan, Leyuan Wu, Yue Xiao, Sien Wang, Guoan Cheng, Ruiting Zheng, Qing Hao
Summary: Composite films consisting of reduced graphene oxides and single-wall carbon nanotubes were synthesized and found to have increasing in-plane thermal conductivities from 100 to 400 K. The unique temperature dependence is attributed to the largely restricted phonon mean free paths within the graphene sheets that contribute to the in-plane thermal transport. The highest in-plane thermal conductivity achieved was 62.8 W/(m·K) at 300 K, ideal for applications like flexible film-like thermal diodes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Yanan Xiao, Yinchang Zhao, Jun Ni, Sheng Meng, Zhenhong Dai
Summary: In this study, the structural stability, lattice thermal conductivity, and transport properties of four cubic antiperovskites Na3FSe are investigated using first-principle calculations combined with self-consistent phonon theory (SCP), compressive sensing techniques (CS), and Boltzmann transport equation (BTE). The results show that the strong quartic anharmonicity of the alkali metal atoms Na atom leads to the hardening of the low-frequency phonon branch, ensuring the dynamic stability of the material. The quartic anharmonicity is also found to play a crucial role in determining the temperature dependence of lattice thermal conductivity. Additionally, the impact of phonon group velocities, scattering rate, and scattering phase space on phonon transport is analyzed, revealing that the low thermal conductivity of Na3FSe is attributed to the strong four-phonon scattering processes dominated by redistribution and Umklapp processes. This study provides important insights into the understanding of quartic anharmonicity and its effects on lattice dynamics and phonon transport, which is crucial for the design and exploration of materials with ultralow thermal conductivity.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Runqing Yang, Shengying Yue, Yujie Quan, Bolin Liao
Summary: Anharmonic phonon-phonon scattering plays a crucial role in heat conduction in solids. By applying a formalism based on group theory to symmetry-based scattering selection rules, the influence of crystal symmetry on lattice thermal conductivity is quantified and potential routes to engineer heat conduction by tuning crystal symmetry are suggested.
Article
Materials Science, Multidisciplinary
Zezhu Zeng, Cunzhi Zhang, Niuchang Ouyang, Yue Chen
Summary: By studying chainlike TlXSe2 crystals, it was discovered that weak in-plane atomic interactions lead to phonon blocking and heat flux confinement, thereby effectively suppressing the overall thermal conductivity. This finding provides fundamental insight into minimizing the thermal conductivity of quasi-one-dimensional crystals.
Article
Nanoscience & Nanotechnology
Leila Kiani, Javad Hasanzadeh, Farrokh Yousefi, Peyman Azimi Anaraki
Summary: The thermal rectification in the graphene-C3B junction was investigated using non-equilibrium molecular dynamics simulation, revealing a strong dependence on the temperature difference between hot and cold baths and the contribution of in-plane and out-of-plane phonon modes. The y mode showed high and positive thermal rectification, while the x and z modes exhibited small and negative rectifications. The underlying mechanisms were studied through phonon density of states analysis.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Zezhu Zeng, Chen Chen, Cunzhi Zhang, Qian Zhang, Yue Chen
Summary: By studying the lattice dynamics and thermal conductivity in perovskites, we discovered that Cs2PbI2Cl2 and Cs2SnI2Cl2 samples have extremely low thermal conductivities. The phonon frequency renormalization of the octahedral rotational soft modes in Cs2PbI2Cl2 plays a crucial role in the thermal transport properties. We also observed similar phonon behaviors in other layered inorganic perovskites.
Article
Chemistry, Multidisciplinary
Bryan T. Spann, Joel C. Weber, Matt D. Brubaker, Todd E. Harvey, Lina Yang, Hossein Honarvar, Chia-Nien Tsai, Andrew C. Treglia, Minhyea Lee, Mahmoud I. Hussein, Kris A. Bertness
Summary: With the combination of nanopillars and membranes, the thermal conductivity of thermoelectric materials has been significantly reduced while the electrical conductivity remains unaffected, achieving decoupling of thermoelectric properties. This finding paves the way for high-efficiency solid-state energy recovery and cooling.
ADVANCED MATERIALS
(2023)
Article
Computer Science, Interdisciplinary Applications
Giuseppe Romano, Steven G. Johnson
Summary: In this study, a methodology for density-based topology optimization of non-Fourier thermal transport in nanostructures is introduced. It utilizes adjoint-based sensitivity analysis of the phonon Boltzmann transport equation (BTE) and a novel material interpolation technique called the transmission interpolation model (TIM). The approach is able to handle the interplay between real- and momentum-resolved material properties by parameterizing the material density with an interfacial transmission coefficient. This methodology allows for the systematic optimization of materials for heat management and conversion, as well as the design of devices where diffusive transport is not valid.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Physics, Applied
Cuiqian Yu, Yanxiao Hu, Jia He, Shuang Lu, Dengfeng Li, Jie Chen
Summary: Recently, the important role of high-order anharmonic phonon-phonon interactions has been revealed in several materials. By solving the Boltzmann transport equation, the significant impact of four-phonon scattering on thermal transport in honeycomb structured monolayer BAs and its hydrogenated bilayer counterparts has been shown. After considering four-phonon scattering, the lattice thermal conductivity of all these structures is reduced, especially for monolayer BAs, which shows a huge drop of 80% mainly due to the suppression of phonon lifetimes. In contrast to graphene, the thermal conductivity of monolayer BAs is abnormally lower than its bilayer counterparts, attributed to the much larger phonon scattering rate. The contribution of flexural acoustic phonon exhibits the most significant reduction in both monolayer and bilayer BAs with horizontal mirror symmetry after including four-phonon scattering.
APPLIED PHYSICS LETTERS
(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
Zhongwei Zhang, Yangyu Guo, Marc Bescond, Jie Chen, Masahiro Nomura, Sebastian Volz
Summary: By using a heat conduction theory incorporating coherence, this study reveals that the strong phase correlation between local and non-propagating modes triggers thermal transport in amorphous materials. It further provides insights into the temperature and length dependences of thermal conductivity and uncovers the wave nature of thermal vibrations.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Physics, Multidisciplinary
Cuiqian Yu, Yulou Ouyang, Jie Chen
Summary: The study demonstrates that specific structural configurations and mechanism designs in multilayer structures can significantly enhance thermal transport, including the influence of coherent and incoherent phonon transport synergistic effects. Tuning the wave-particle duality of phonons can improve effective thermal conductivity, providing a new approach for enhancing thermal management in devices with densely packed interfaces.
FRONTIERS OF PHYSICS
(2022)
Article
Physics, Applied
Weijun Ren, Jie Chen, Gang Zhang
Summary: This paper reviews the impact of twisted angle on the phonon properties and discusses the research on phonon transport behavior. It also addresses the unresolved questions and challenges in the phonon characteristics of twisted two-dimensional materials and proposes possible solutions.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Pengfei Jiang, Nianbei Li, Jie Chen
Summary: In this study, a kinked structure in single-layer graphene was observed through phonon wave packet simulations. The observed structure agrees well with the tanh-form solution of the soliton wave, indicating its soliton nature. Separate soliton wave packet simulations further supported this conclusion, obtaining consistent results with the phonon wave packet simulations. Our study provides a useful platform to study soliton wave transport in realistic materials.
Review
Physics, Multidisciplinary
Jie Chen, Jia He, Dongkai Pan, Xiaotian Wang, Nuo Yang, Jiaojiao Zhu, Shengyuan A. Yang, Gang Zhang
Summary: This review article presents the recent advances in emerging phonon phenomena, including the wave nature and particle nature of phonons. The article summarizes the effects of phonon coherence on thermal conductivity and the topological properties of phonons, as well as the weak coupling and high-order anharmonicity of phonons. Additionally, the article provides a brief outlook for future research directions.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Chemistry, Multidisciplinary
Jianhui Jiang, Shuang Lu, Yulou Ouyang, Jie Chen
Summary: This paper explores the origin of the convergence of thermal conductivity in two-dimensional materials and reveals the important role of the normal scattering process in determining the thermal conductivity of these materials.
Article
Physics, Multidisciplinary
Ming-Jun Li, Lina Yang, Deng Wang, Si-Yi Wang, Jing-Nan Tang, Yi Jiang, Jie Chen
Summary: Traditional methods cannot non-destructively and quickly detect the internal structure of pavements, so it is important to accurately and quickly predict the mechanical properties of layered pavements. In recent years, machine learning has shown great superiority in solving nonlinear problems. This paper proposes a method based on random forest regression to predict the maximum deflection and damage factor of layered pavements under instantaneous large impact using the deflection basin parameters obtained from falling weight deflection testing. The prediction results have high consistency with finite element simulation results, indicating the potential of this method in non-destructive evaluation of pavement structure.
Article
Materials Science, Multidisciplinary
Wei-Jun Ren, Shuang Lu, Cui-Qian Yu, Jia He, Jie Chen
Summary: The carbon honeycomb structure has both high in-plane thermal conductivity and high axial thermal conductivity, which is robust to structural disorder. This study suggests that the carbon honeycomb structure has unique advantages to serve as a thermal management material.
Article
Physics, Multidisciplinary
Jian-Hui Jiang, Shuang Lu, Jie Chen
Summary: The rise of artificial microstructures has allowed for the modulation of various waves, including light, sound, and heat. In this study, we propose an atomic level triangular structure in single-layer graphene to achieve the phonon focusing effect. Our simulation results demonstrate that the height of the triangular structure can control multiple features related to the phonon focusing effect in the positive incident direction. Additionally, a distinct focusing pattern and enhanced energy transmission coefficient are observed in the reverse incident direction. Fourier transform analysis provides insights into the mode conversion physics of the phonon wave packet.
CHINESE PHYSICS LETTERS
(2023)
Article
Physics, Applied
Weijun Ren, Shuang Lu, Cuiqian Yu, Jia He, Zhongwei Zhang, Jie Chen, Gang Zhang
Summary: In this study, non-equilibrium molecular dynamics simulations were used to investigate the in-plane thermal conductivity of graphene/hexagonal boron nitride (h-BN) moire superlattices. It was found that the in-plane thermal conductivity decreases monotonically with increasing interlayer rotation angle within a small range. The atomic stress amplitude exhibits a periodic distribution corresponding to the structural moire pattern. The analysis at the atomic level revealed a competition between the magnitude and directional change of the in-plane heat flow, with the directional change playing a dominant role in determining the in-plane thermal conductivity. The decreasing trend of in-plane thermal conductivity at small rotation angles was explained by the reduced low-frequency phonon transmission and the blue shift of the transmission peak.
APPLIED PHYSICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Zhongwei Zhang, Yangyu Guo, Marc Bescond, Masahiro Nomura, Sebastian Volz, Jie Chen
Summary: In this paper, a theoretical model for exploring phonon coherence based on spectroscopy is proposed and validated using Brillouin light scattering data and molecular dynamic simulations. The model shows that confined modes exhibit wavelike behavior with a higher ratio of coherence time to lifetime. The spectroscopy data also demonstrates the dependence of phonon coherence on system size. The proposed model allows for reassessing conventional spectroscopy data to obtain coherence times, which are crucial for understanding and estimating phonon characteristics and heat transport in solids.
Article
Materials Science, Multidisciplinary
Cuiqian Yu, Shuyue Shan, Shuang Lu, Zhongwei Zhang, Jie Chen
Summary: Through molecular dynamics simulations, the fundamental characteristics of second sound are explored in a transient heat conduction modeling in single-layer and multilayer graphene and graphite. The results demonstrate that second sound can carry more heat energy and maintain for a longer lifetime than ballistic pulse. The effects of thickness and temperature on second sound propagation are also investigated.
Article
Materials Science, Multidisciplinary
Shuang Lu, Weijun Ren, Jia He, Cuiqian Yu, Pengfei Jiang, Jie Chen
Summary: Introduced the importance of crystal symmetry in thermal transport in solids, focusing on the case of inversion symmetry breaking in monolayer Ta2CS2 that abnormally enhances lattice thermal conductivity in 2D functionalized MXenes.
