Article
Materials Science, Multidisciplinary
Andrew Urichuk, Jesko Sirker, Andreas Kluemper
Summary: The spin-1/2 XXZ chain shows non-zero Drude weight at finite temperatures, with the leading orders of the Drude weight expressed as a fractal structure dependent on anisotropy Delta. The analytical results for low-temperature asymptotics were obtained using a thermodynamic Bethe ansatz approach.
Article
Physics, Applied
Nerea Ontoso, C. K. Safeer, Josep Ingla-Aynes, Franz Herling, Luis E. Hueso, M. Reyes Calvo, Felix Casanova
Summary: Multi-directional spin-to-charge conversion has been demonstrated in low-symmetry materials and interfaces, where spin polarizations can be converted into a charge current in the same direction regardless of their orientations. In this study, we investigate the spin-to-charge conversion in graphene/MoTe2 heterostructures at low temperatures. We observe unconventional charge conversion for out-of-plane spins and the evolution of non-local voltage signals arising from in-plane spin polarizations.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Sudip Kumar Saha, Manodip Routh, Manoranjan Kumar, Zoltan G. Soos
Summary: The study of the antiferromagnetic J(1) - J(2) model involves extensive research and calculations, revealing the relationship between different thermodynamic properties and the thermodynamic results for specific parameters.
Article
Mechanics
J. K. Holmen, S. Thomesen, M. J. Perez-Martin, O. S. Hopperstad, T. Borvik
Summary: This study explores the ballistic performance of Strenx 960 Plus steel plates at different temperatures and finds that the ballistic limit velocities at low temperatures are higher than those at room temperature, indicating the absence of brittle fracture. The analytical model suggests that ductile fracture prevails in realistic stress histories, supporting the idea that modern steels are unlikely to experience brittle fracture even under rapid loading and low temperatures.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2022)
Article
Physics, Multidisciplinary
Pankaj Bhalla, Ming-Xun Deng, Rui-Qiang Wang, Lan Wang, Dimitrie Culcer
Summary: Topological edge states show dissipationless transport. Nonlinear electrical response of ballistic TES confirms the presence of symmetry breaking terms, such as deviations from nonlinearity. The direction of nonlinear response is determined by the spin orientation with respect to the Zeeman field.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Tanoy Kanti Konar, Srijon Ghosh, Amit Kumar Pal, Aditi Sen (De)
Summary: We design quantum refrigerators based on spin- j quantum XY Z and bilinear-biquadratic models with individual spins attached to bosonic thermal baths. By considering both local and global master equations, we illustrate an enhancement in the performance of the refrigerators with an increase in the spin dimension irrespective of the choice of the spin models. To assess the performance of the refrigerators, we introduce a distance-based measure to quantify the local temperature of a particle with arbitrary spin quantum number j. Interestingly, we find that the local temperature quantifier, defined via minimizing the distance between a spin- j thermal state and the evolved state of the spin- j particle in the steady state, coincides with the population-based definition of local temperature known in the literature for spin-21 particles. Moreover, we demonstrate that the qualitative behavior of the distance-based local temperature is independent of the choice of the distance measure by comparing the trace distance, Uhlmann's fidelity, and relative entropy distance. We further observe by computing a local master equation that the quantum refrigerator consisting of a spin-1/2 and a spin-j particle can lead to a lower local temperature compared to a refrigerator with two identical spin- j particles following the XY Z interactions.
Article
Materials Science, Multidisciplinary
Wenjie Chen, Xintong Li, Zhenhai Hu, Ze Hu, Li Yue, Ronny Sutarto, Feizhou He, Kazuki Iida, Kazuya Kamazawa, Weiqiang Yu, Xi Lin, Yuan Li
Summary: The single crystals of Na2Co2TeO6 exhibit complex low-temperature phase behaviors, including a new thermal phase transition with 2D and 3D long-range magnetic orders. Excitations from the 3D order support a triple-q description, contrary to the commonly accepted zigzag nature, indicating a fundamental feedback on high-energy excitations. These findings suggest Na2Co2TeO6 as a spin-orbit entangled frustrated magnet with rich physics.
Article
Chemistry, Inorganic & Nuclear
Qi Zhao, Jin-Peng Xue, Zhi-Kun Liu, Zi-Shuo Yao, Jun Tao
Summary: A mononuclear complex with long alkyl chains was synthesized, showing incomplete one-step spin crossover in magnetic measurements. Various methods, including changing scanning rate, sample annealing, and light irradiation, were used to effectively improve the completeness of spin crossover.
DALTON TRANSACTIONS
(2021)
Review
Chemistry, Multidisciplinary
Yinglun Sun, Bao Liu, Lingyang Liu, Xingbin Yan
Summary: This article discusses the ion transport issues in electrochemical energy storage devices at low temperatures and surveys the strategies to solve these problems. Finally, it proposes the directions for building high-performance low-temperature-available EES devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hernan B. Xavier, Rodrigo G. Pereira
Summary: This paper studies the junction of three gapless spin-1 chains and discovers a special point where the junction behaves like a tunable spin circulator. Moreover, the paper sets the stage for network constructions of non-Abelian chiral spin liquids.
Article
Materials Science, Multidisciplinary
Shashank Kumar Ranu, Daniel D. Stancil
Summary: This study proposes a method for calculating excited states of spin chains and demonstrates its application on small spin chains. The method involves finding the equilibrium points of the energy vs wave-number curve and is validated using numerical techniques and an IBM quantum processor. Furthermore, the study discusses the circuit complexity and scalability of the proposed method.
Article
Materials Science, Multidisciplinary
Yanyan Shangguan, Song Bao, Zhao-Yang Dong, Zhengwei Cai, Wei Wang, Zhentao Huang, Zhen Ma, Junbo Liao, Xiaoxue Zhao, Ryoichi Kajimoto, Kazuki Iida, David Voneshen, Shun-Li Yu, Jian-Xin Li, Jinsheng Wen
Summary: The research demonstrates that excited quasiparticles in the compound Na2Cu2TeO6 can counter thermal decoherence and maintain strong correlations at elevated temperatures, showing unique dispersive and gap properties.
Article
Materials Science, Multidisciplinary
Mark Johnson
Summary: The paper focuses on the empirical demonstration of the impact of Rashba spin-orbit interaction on a high-mobility two-dimensional electron system, showing conductance oscillations as a result of spin-polarized carriers injection. The experimental results indicate that such behavior occurs over a length scale of a ballistic mean free path.
Article
Engineering, Mechanical
Santanu Choudhury, Chandra Sekher Yerramalli, Anirban Guha
Summary: An analytical model considering strain rate and temperature effects of the matrix material was developed for glass fabric reinforced polymer (GFRP) composite in armor applications. The model predicted that the ballistic limit velocity of GFRP composites increases with decreasing temperature, and a significant amount of kinetic energy is dissipated in the form of strain energy and shear plug formation. The thickness of shear plug at the ballistic limit increases at lower temperatures, indicating a shift in failure mechanism towards shear. The inclusion of rate dependency effects of the matrix did not significantly change the ballistic limit predictions at lower temperatures.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
M. M. Glazov
Summary: This study develops a theory of the valley and spin Hall effects and the resulting accumulation of the valley and spin polarization. It investigates the electron transport in both the ballistic and hydrodynamic regimes, taking into account the effects of anomalous velocity, side-jump, and skew scattering. The polarization magnitude and spatial distribution strongly depend on the transport regime, with significantly larger polarization in the hydrodynamic regime and notable valley and spin polarization near the channel edges due to side-jump and skew scattering mechanisms.
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
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
Thermodynamics
Yong-Mei Zhang, Mauro Antezza, Jian-Sheng Wang
Summary: The presence of interlayer interactions in twisted bilayer graphene (TBG) enhances several characteristics, including the optical and electronic properties. A series of double magic angles have been theoretically investigated in TBG. The thermal radiation from TBG can be tuned to the far infrared range by changing twist angles.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(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
Materials Science, Multidisciplinary
Hangbo Zhou, Gang Zhang, Jian-Sheng Wang, Yong-Wei Zhang
Summary: We investigate the anharmonic phonon scattering across a weakly interacting interface and find that the contribution from anharmonic three-phonon scatterings can be described by a temperature-dependent Landauer formula. Surprisingly, in the weak coupling limit, the transmission due to anharmonic phonon scattering increases indefinitely with temperature, which is not the case for two-phonon processes. We further reveal that anharmonic effects dominate over harmonic processes even at room temperature in real heterogeneous interfaces, emphasizing the importance of anharmonicity in weakly interacting systems.
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.
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.
Review
Physics, Multidisciplinary
Jian-Sheng Wang, Jiebin Peng, Zu-Quan Zhang, Yong-Mei Zhang, Tao Zhu
Summary: This article discusses the description and modeling of transport phenomena in electron systems coupled via scalar or vector photons. It is divided into three parts: scalar photons (Coulomb interactions), transverse photons (described by vector potentials), and the phi = 0 or temporal gauge, which is a complete theory of electrodynamics. The nonequilibrium Green's function (NEGF) formalism is used as a tool to study steady-state transport, with the advantage of going beyond fluctuational electrodynamics (FE) due to its generality. Several examples are provided, including heat transfer between graphene sheets, light emission from a double quantum dot, and emission of energy, momentum, and angular momentum from a graphene nanoribbon. All calculations are based on a generalization of the Meir-Wingreen formula, with materials properties represented by photon self-energy and coupled with the Keldysh equation and the solution to the Dyson equation.
FRONTIERS OF PHYSICS
(2023)
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
Yong-Mei Zhang, Tao Zhu, Zu-Quan Zhang, Jian-Sheng Wang
Summary: We have developed a general microscopic theory for the transfer of energy, momentum, and angular momentum mediated by photons. Using the nonequilibrium Green's function method, we have proposed a unified formalism for describing the energy emitted, force experienced, and torque experienced by objects due to fluctuating electromagnetic fields. Our theory does not rely on the assumption of local thermal equilibrium and is applicable to arbitrary objects and non-reciprocal environments. By applying our theory to transport problems of graphene edges, we have demonstrated its capability and shown results that go beyond the predictive ability of conventional theories.
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.
