Article
Thermodynamics
Xu Huang, Zhixiong Guo
Summary: The study focuses on the thermal dissipation in diamond/GaN heterostructures with different epilayers. It is found that Si3N4 epilayer has the lowest thermal boundary resistance among the three types of diamond/GaN interfaces. Additionally, c-BN is emerging as a promising material for optoelectronic devices due to its diamond-like thermal properties and ability to reduce interfacial TBR in the diamond/c-BN interface.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
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
Thermodynamics
Chao Yang, Jian Wang, Dezhi Ma, Zhiqiang Li, Zhiyuan He, Linhua Liu, Zhiwei Fu, Jia-Yue Yang
Summary: Diamond substrate with superior thermal conductivity has been considered as a potential solution for heat dissipation in GaN-based power electronics. However, the effects of high concentration Ga/N atomic vacancies on phonon transport across the GaN-diamond interface remain largely unexplored. This study investigates the influence of vacancy-phonon scattering on the thermal resistance of the interface and provides guidance for improving the heat dissipation performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Manufacturing
Yingchun Liu, Zhaosong Hu, Maoping Lyuc, Haohan Wu, Bowen Liu, Shirong Sun, Xuliang Lin, Xueqin Qiu, Yanlin Qin
Summary: This study demonstrates the use of bio-based epoxy, phosphorus-nitrogen curing agents, graphite flakes, and 4,4 & PRIME;-methylenebis(cyclohexylamine) to reduce the thermal resistance of thermal interface materials (TIM). The interaction between graphite flakes and epoxy resin is optimized using the Diels-Alder reaction, resulting in low interface thermal resistance and improved heat conduction capability. This research provides a facile method for tuning the interfacial thermal conduction of carbon-based thermal management materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Thermodynamics
Roisul H. Galib, Prabhakar R. Bandaru
Summary: Vertically stacked devices are a promising direction in electronics, but thermal resistance is a major issue. This study estimated the thermal boundary conductance and converse thermal resistance using a graphene-based platform, and found that weak van der Waals interactions and phonon frequency mismatch are the reasons for the reduced thermal boundary conductance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Physical
Kim Lopez-Guell, Nicolas Forrer, Xavier Cartoixa, Ilaria Zardo, Riccardo Rurali
Summary: Crystal phase engineering can alter phonon transport, and twinning superlattices exhibit two transportation mechanisms depending on interface number and spacing.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Kim Lopez-Guell, Nicolas Forrer, Xavier Cartoixa, Ilaria Zardo, Riccardo Rurali
Summary: Crystal phase engineering allows for the manipulation of phonon transport in periodic nanostructures, such as twinning superlattices. This study focuses on GaAs and InAs twinning superlattices and identifies two distinct transport regimes, one where each interface behaves as an independent scatterer and another where a segment with closely spaced interfaces acts as a metamaterial with its own thermal properties.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Thermodynamics
O. Farzadian, F. Yousefi, C. Spitas, K. Kostas
Summary: In this study, non-equilibrium molecular dynamics simulations were used to investigate phonon heat transport in a two-dimensional superlattice with equal-sized domains of graphene and phagraphene. It was found that the minimum thermal conductivity occurred at a superlattice period of 12.85 nm for ribbons, with a value of 155 W/mK. The minimum thermal conductivity of graphene-phagraphene superlattices is approximately 5% of pure graphene thermal conductivity and 50% of phagraphene thermal conductivity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Chemistry, Physical
Wennan Hu, Zhe Sheng, Xiang Hou, Huawei Chen, Zengxing Zhang, David Wei Zhang, Peng Zhou
Summary: Ambipolar 2D semiconductors, with excellent gate-controlled capability and distinctive physical characteristics, allow for dynamic tuning between holes and electrons, leading to the development of novel devices with advantages in various applications. This review provides a comprehensive overview of the basic knowledge, current semiconductors, preparation approaches, properties, and emerging device structures in the field of ambipolar 2D semiconductors. These materials hold great potential for future developments in new devices with novel functions and the advancement of 2D materials applications.
Article
Chemistry, Multidisciplinary
Ke Wang, WuXing Zhou, Yuan Cheng, Min Zhang, Hai Wang, Gang Zhang
Summary: The study investigated how spin affects the phononic properties of CrI3 monolayers, finding that infrared spectra can be used to identify magnetic order and explaining the mechanisms behind thermal expansion coefficients and lattice thermal conductivity being influenced by magnetic phases. This research provides insights into spin-lattice coupling and highlights the potential of spintronic monolayers as thermal switching devices for active heat flow control.
Article
Chemistry, Physical
Eric Osei-Agyemang, Ganesh Balasubramanian
Summary: This paper presents a detailed analysis of the lattice thermal conductance of 2D β-SiC7, revealing its anisotropic thermal transport and significantly lower thermal conductivity compared to graphene due to the presence of silicon atoms. The analysis also highlights the phonon group velocities and carrier lifetimes of different modes in the material, suggesting that nanostructuring may reduce the thermal conductance and enhance the material's thermoelectric efficiency.
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
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
Jiahui Pan, Xing Fan, Kedong Zhang, Zhiming Geng, Jinshan Yao, Yu Deng, Jian Zhou, Xue-Jun Yan, Ming-Hui Lu, Hong Lu, Yan-Feng Chen
Summary: Interface, an important concept in thermal transport research, has been studied by modifying the morphology and thermal resistance of an Al/GaAs interface with ErAs. Observed transitions of phonon behaviors were achieved by altering the thickness of ErAs.
MATERIALS TODAY PHYSICS
(2022)
Article
Thermodynamics
Guoqing Sun, Jinlong Ma, Chenhan Liu, Zheng Xiang, Dongwei Xu, Te-Huan Liu, Xiaobing Luo
Summary: A comprehensive understanding of phonon transport is crucial for material exploration. The study reveals the significance of four-phonon and normal scattering in hexagonal structures. The relative intensity of four-phonon scattering increases with atomic mass ratio, while the N process weakens. Callaway and Allen's models are found to be applicable in cases with relatively weak N scattering intensity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Multidisciplinary
Tingting Yin, Kanchan Ajit Ulman, Sheng Liu, Andres Granados del Aguila, Yuqing Huang, Lifa Zhang, Marco Serra, David Sedmidubsky, Zdenek Sofer, Su Ying Quek, Qihua Xiong
Summary: This study reveals the existence of chiral phonons in 2D magnetic CrBr3, which can completely switch the polarization of incident light, and non-chiral A(g) phonons exhibit significant magneto-optical effects under an external magnetic field. These results lay a foundation for further studies on phonon chirality and magneto-optical phenomena in 2D magnetic materials.
ADVANCED MATERIALS
(2021)
Article
Physics, Multidisciplinary
Juan Yang, Xing Yu, Zhizhou Yu, Lifa Zhang
Summary: Borophene, a new member of the two-dimensional material family, exhibits extremely low thermal conductivity which benefits the efficiency of the Seebeck effect in thermoelectric devices. The spin-dependent thermoelectric transport in a Co-salophene molecule sandwiched between two semi-infinite borophene nanoribbon electrodes shows excellent spin-filter efficiency, suggesting potential applications in spin caloritronics.
Article
Chemistry, Multidisciplinary
Hao Chen, Weikang Wu, Jiaojiao Zhu, Zhengning Yang, Weikang Gong, Weibo Gao, Shengyuan A. Yang, Lifa Zhang
Summary: This study reveals an intrinsic connection between the chiralities of a crystal structure and its phonon excitations, leading to the realization of a chiral phonon diode effect in chiral crystals.
Article
Physics, Multidisciplinary
Longkai Lu, Dengke Ma, Ming Zhong, Lifa Zhang
Summary: Temperature oscillations are observed in one-dimensional superlattices due to the localization of high frequency phonons.
NEW JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jiaojiao Zhu, Weikang Wu, Jianzhou Zhao, Hao Chen, Lifa Zhang, Shengyuan A. Yang
Summary: The study reveals a unique class of topological phonons - symmetry-enforced nodal-chain phonons, which exist in five space groups with distinct patterns in tetragonal and cubic systems. These phonons are guaranteed to exist at non-time-reversal-invariant-momentum points due to the vector basis symmetry of phonons, which is a feature limited to phononic systems. Additionally, first-principles calculations identify K2O as a material hosting these nodal-chain phonons with the effect of LO-TO splitting helping to expose them in a large frequency window.
NPJ QUANTUM MATERIALS
(2022)
Review
Physics, Condensed Matter
Dengke Ma, Yuheng Xing, Lifa Zhang
Summary: This review focuses on the importance of heat dissipation and the decrease of interfacial thermal resistance (ITR) for integrated electronics and Li-ion battery-based devices. It discusses the widely used strategy of introducing interlayer to achieve this goal and the bonding effect and bridging effect as mechanisms to decrease ITR. Simulative and experimental studies are reviewed to explore the use of these effects in real materials and practical systems. The review also discusses the design rules and optimization of interlayers using machine learning algorithms, and proposes challenges and future directions in this field.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Dingbo Zhang, Ke Wang, Shuai Chen, Lifa Zhang, Yuxiang Ni, Gang Zhang
Summary: Based on ab initio calculations and the phonon Boltzmann transport equation, this study found that magnetic phase transitions can significantly change the thermal conductivity of monolayer MnPS3. The study sheds light on the understanding of phonon thermal conductivity in 2D magnets and provides a practical method for the realization of 2D thermal switching devices. It has a broad range of novel applications including energy conversion and thermal management.
Article
Materials Science, Multidisciplinary
Guohuan Xiong, Hao Chen, Dengke Ma, Lifa Zhang
Summary: This study theoretically predicts the effective magnetic fields induced by chiral phonons using a point-charge model. It shows that these magnetic fields can manipulate the Curie temperature and spontaneous magnetization in ferromagnetic materials or even general materials.
Article
Materials Science, Multidisciplinary
Yuheng Xing, Hao Chen, Ning Xu, Xiao Li, Lifa Zhang
Summary: In this study, we demonstrate valley magnons and valley modulations in a kagome ferromagnetic lattice. By introducing Dzyaloshinskii-Moriya and staggered exchange interactions, it is found that valley Hall effect and anomalous Hall effect, as well as a series of topological phase transitions of magnons can be achieved. These findings provide new insights into the application of spin and valley degrees of freedom.
Article
Materials Science, Multidisciplinary
Qianqian Wang, Si Li, Jiaojiao Zhu, Hao Chen, Weikang Wu, Weibo Gao, Lifa Zhang, Shengyuan A. Yang
Summary: This study investigates chiral phonons in crystal lattices with fourfold rotational symmetry. It is found that the realization of C-4 chiral phonons in two-dimensional square lattices requires the breaking of time-reversal symmetry, while in three-dimensional chiral tetragonal lattices, they can exist on a C-4-invariant path. These phonons have the advantage of being more readily coupled with optical transitions, facilitating their experimental detection.
Article
Materials Science, Multidisciplinary
Jiaojiao Zhu, Weikang Wu, Jianzhou Zhao, Cong Chen, Qianqian Wang, Xian-Lei Sheng, Lifa Zhang, Y. X. Zhao, Shengyuan A. Yang
Summary: In this study, phonons in 2D graphyne family materials were investigated using first-principle calculations and topology/symmetry analysis. It was found that phonons in both graphdiyne and gamma-graphyne exhibit a second-order topology and the existence of protected phonon corner modes was verified. Additionally, a 3D real Chern insulator state for phonons in 3D graphdiyne was demonstrated.
Article
Materials Science, Multidisciplinary
Guohuan Xiong, Zhizhou Yu, Lifa Zhang
Summary: In this study, we predict and explore the interband chiral phonon transfer in a honeycomb lattice with an external magnetic field. The transfer of chiral phonons is accompanied by band inversions and the opening or closing of bandgaps, which can be attributed to the abrupt change of phonon band topology. The signs of phonon magnetic moments tend to be the same with increasing strength of the magnetic field, leading to an increasing phonon magnetic moment. Our findings enrich the understanding of chiral phonons and may provide theoretical guidance for manipulating chiral phonons with an external magnetic field.
Article
Physics, Fluids & Plasmas
Tingting Wang, Yu Yang, Yuancheng Wu, Lei Xu, Dengke Ma, Lifa Zhang
Summary: In this paper, the interface thermal resistance of a homogeneous stepped system is studied through the multiparticle Lorentz gas model, showing that ITR can be triggered by pure geometric shape mismatch and decreases with decreasing mismatch degree. Furthermore, thermal rectification effect is obtained in this system due to the asymmetrical nature of the ITRs for forward and backward transport.
Article
Materials Science, Multidisciplinary
Xiaozhe Li, Chongqun Xia, Yang Pan, Mengnan Gao, Hao Chen, Lifa Zhang
Summary: In this study, a chiral interface mode localized at the line defect in hexagonal boron nitride intralayer heterojunction was discovered and shown to be topologically protected. By applying different harmonic forces, selective excitation of topological chiral phonons at different valleys can enable directional transmission without dissipation.
Article
Chemistry, Multidisciplinary
Yunshan Zhao, Minrui Zheng, Jing Wu, Xin Guan, Ady Suwardi, Yida Li, Manohar Lal, Guofeng Xie, Gang Zhang, Lifa Zhang, John T. L. Thong
Summary: This research reveals that Mo-vacancies impede phonon transport in MoS2 more significantly than S-vacancies, resulting in a larger reduction of thermal conductivity. Additionally, as defect concentration increases, the in-plane crystalline networks in MoS2 are gradually damaged, leading to a gradual decrease in measured thermal conductivity.