Article
Materials Science, Multidisciplinary
L. Desplat, S. Meyer, J. Bouaziz, P. M. Buhl, S. Lounis, B. Dupe, P. -A. Hervieux
Summary: This research demonstrates the generation of Dzyaloshinskii-Moriya interaction in ultrathin metal film from a femtosecond pulse in electric field, achieving magnetoelectric coupling. Through calculations and simulations, it is shown that this phenomenon does not require structural inversion-symmetry breaking and can be achieved in a very short timescale.
Article
Physics, Fluids & Plasmas
Juliane U. Klamser, Tridib Sadhu, Deepak Dhar
Summary: This study reveals multiple phase transitions in a two-dimensional system of interacting thin rods, including both spontaneous symmetry-breaking and geometrical phase transitions. The latter class of transitions is temperature-independent, while the critical coupling for the former depends on temperature, resulting in a rich phase behavior with the possibility of phase boundary crossings by varying the temperature.
Article
Physics, Applied
Peipei Lu, Haifeng Du, Le Wang, Hang Li, Wenhong Wang, Youguo Shi, Xueliang Wu, Young Sun, Yisheng Chai
Summary: We have explored the skyrmion phases and phase diagram of MnSi using the magnetoelectric coefficient alpha(E) and ac magnetic susceptibility of MnSi/0.7Pb(Mg1/3Nb2/3)O(3-)0.3PbTiO(3) composite material. The results show that the regular skyrmion lattice phase in single-crystal MnSi is averaged in the polycrystal due to random grain orientations, resulting in an extended skyrmion lattice-conical mixture phase at lower temperatures. The depinning field is stronger in the polycrystal than in the single crystal, possibly due to grain boundaries and defects.
APPLIED PHYSICS LETTERS
(2022)
Article
Mathematics, Applied
Mohammad Mehdi Shafie, Reza Kheradmand, Mohammad Ghahramani, Franco Prati
Summary: By superimposing a suitable control beam matched in frequency with a different cavity mode to the constant driving field in forced ring lasers, phase solitons can be created. When the two beams are separated by n free spectral ranges of the cavity, a train of equispaced phase solitons is generated, representing a simple way to produce frequency combs with flexible frequency spacing and high power per line.
Article
Chemistry, Physical
Jie Peng, Sijie Zhang, Keith Refson, Martin T. Dove
Summary: In this study, we used Density Functional Theory methods to calculate the lattice dynamics and classical molecular dynamics (MD) simulation methods to investigate the two phases of the molecular crystal acetylene. The two phases have the same face-centred cubic lattice arrangement, but differ in molecular orientations. We found that the higher-temperature phase has lower phonon frequencies and greater entropy, providing thermodynamic stability at higher temperatures. The lattice dynamics calculations revealed instabilities associated with phonons involving pure rotations of the molecules in this phase. The MD simulations showed significant librational motion and a potential phase transition to a structure with tetragonal symmetry. Overall, the phase transition in acetylene is a rare example that involves elements of three types of transitions: displacive, order-disorder, and reconstructive.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Ping Tang, Ryo Iguchi, Ken-ichi Uchida, Gerrit E. W. Bauer
Summary: We present a scattering theory for polarization and heat transport in a ballistic ferroelectric point contact. We predict the presence of a polarization current under either an electric field or a temperature difference, which strongly depends on the direction of the ferroelectric order and can be detected through its magnetic stray field, thermovoltage, and Peltier effect.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
B. E. Zuniga Cespedes, P. Vir, P. Milde, C. Felser, L. M. Eng
Summary: The study found antiskyrmion lattices in ultrathin Mn1.4PtSn lamellae and identified the critical thickness-to-width aspect ratio for the transition from ferromagnetic fractal domain to noncollinear texture phase. Additionally, there was a strong hysteresis observed for the occurrence of antiskyrmion lattice formation during the transition to field polarized state.
Article
Multidisciplinary Sciences
Amal Aldarawsheh, Imara Lima Fernandes, Sascha Brinker, Moritz Sallermann, Muayad Abusaa, Stefan Bluegel, Samir Lounis
Summary: Antiferromagnetic (AFM) skyrmions are considered ideal localized topological magnetic bits in future information technologies. They are immune to the skyrmion Hall effect and might offer potential terahertz dynamics even in the absence of external magnetic fields and dipolar interactions. However, their realization in non-synthetic AFM films has been elusive.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Fluids & Plasmas
Spencer Farrell, Andrew D. Rutenberg
Summary: Single-file diffusion with particles immobilizing by binding and unbinding within one-dimensional channels exhibits anomalously slow collective transport, with shorter channels leading to a non-Fickian regime. This behavior can be described well by a two-state model with slow binding rates determining the switching time between high-flux directed transport and low-flux leaky states. Longer systems are more often in a low-flux state, resulting in non-Fickian behavior.
Article
Physics, Fluids & Plasmas
Samiran Ghosh
Summary: The transport properties of the weakly nonlinear two-dimensional quasilongitudinal dust lattice mode in a experimentally realized highly viscous, strongly coupled, weakly ionized plasma were studied. The dynamics of weakly nonlinear system is described by a 2D dissipative-dispersive nonlinear partial differential equation. Analytical and computational results predict strong viscosity induced Shilnikov homoclinic chaos that can trigger a phase transition.
Article
Materials Science, Multidisciplinary
Tianchang Ma, Tomotaka Miyazawa, Toshiyuki Fujii
Summary: This study investigates the formation of deformation bands in copper single crystals with the stress axis oriented in the direction of the coplanar-double-slip system. The characteristics of deformation bands with kink bands are studied through multiple-plane observation, revealing that an inhomogeneous deformation causes the formation of deformation bands in double-slip-oriented copper single crystals at low plastic strain levels. The relationship between the deformation behavior and the activated slip systems is further explained by studying the crystallographic features of the deformation bands, improving the understanding of inhomogeneous deformation in single crystals.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Multidisciplinary
Kei Hayashi, Sota Kawamura, Yusuke Hashimoto, Noboru Akao, Zhicheng Huang, Wataru Saito, Kaichi Tasaki, Koichi Hayashi, Tomohiro Matsushita, Yuzuru Miyazaki
Summary: Lattice defect engineering is a promising approach for developing thermoelectric materials with low thermal conductivity. In the case of Mg2Si single crystals, the introduction of Si vacancy defects leads to the formation of dislocation cores, resulting in a lower thermal conductivity compared to polycrystalline Mg2Si. This study investigated the effects of oxygen on lattice defects in Mg2Si single crystals and found that oxygen can stabilize the formation of Si vacancies by interacting with dislocation cores.
Article
Mechanics
Di Liu, Donglai Liu, Hailong Chen
Summary: This paper presents a novel nonlocal lattice particle method for full-field modeling of hexagonal close-packed (HCP) single crystals using reformulations of conventional continuum theories. The interaction between material particles in this method is nonlocal, and depends not only on the deformation states of the two particles, but also on the deformation states of all their neighbors. Equivalency assumptions are made to determine the material particle interaction for mechanical, thermal, and thermal-mechanical coupling problems. Numerical studies show good agreements between the results from the proposed method and the conventional continuum theories.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
M. Niewczas, A. Kula
Summary: Studies have shown that polytypes structures (PSs) can form in the microstructure of deformed Mg single crystals as a result of lattice distortion in dislocations' tangles. Interactions between dislocations in a confined space lead to the nucleation of PSs. Overlapping strain fields from mutually interlocked dislocations and stacking faults promote the development of polytypes domains within the PSs.
Article
Multidisciplinary Sciences
Takahiro Shimojima, Asuka Nakamura, Xiuzhen Yu, Kosuke Karube, Yasujiro Taguchi, Yoshinori Tokura, Kyoko Ishizaka
Summary: The study successfully tracked the dynamics of skyrmions and revealed their evolution at different time scales. The repeatable motion of magnetic skyrmions around defects demonstrates the arrangement and relaxation of skyrmion clusters.
Article
Chemistry, Physical
Bin-Bin Zhang, Fangbao Wang, Xin Liu, Bao Xiao, Meng Xu, Song-Tao Dong, Yadong Xu, Paul Sellin, Wanqi Jie
Summary: This research utilized voltage cycling technique to achieve stable alpha-particle spectra in CsPbBr2.4Cl0.6 device, revealing the influence of ion migration on the stability and energy spectra of detectors. The study demonstrates a strong correlation between ion migration processes and stable energy spectra in halide perovskite materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Han Sun, Jianxi Liu, Ce Zhou, Wenhui Yang, Hao Liu, Xin Zhang, Zhihuan Li, Binbin Zhang, Wanqi Jie, Yadong Xu
Summary: This study demonstrates the design of subwavelength structures on ZnTe crystals through surface engineering to enhance ultrabroadband transmission, achieving significant antireflection effects in the visible-near-infrared, infrared, and terahertz regions. The transmittance increase is attributed to the decrease of surface Fresnel reflection by the engineered surface structures, with notable transmittance exceeding 70% in the 0.2-1.0 THz range.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Xin Liu, Meng Xu, Yingying Hao, Jinghua Fu, Fangbao Wang, Binbin Zhang, Stephanie Bennett, Paul Sellin, Wanqi Jie, Yadong Xu
Summary: Using an improved crystallization method, high resistivity and mobility FAPbBr(3) single crystals were successfully grown, demonstrating great potential as reliable radiation detectors at room temperature. Additionally, a detector was constructed that could resolve gamma peaks at 59.5 keV, achieving an energy resolution of 40.1% at 30 V by collecting hole signals.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Nanoscience & Nanotechnology
Jun Guo, Yadong Xu, Wenhui Yang, Bao Xiao, Qihao Sun, Xinlei Zhang, Binbin Zhang, Menghua Zhu, Wanqi Jie
Summary: A flexible X-ray detector based on lead-free Cs2TeI6 perovskite film and a polyimide (PI) substrate is reported, showing superior response stability and high sensitivity. Clear X-ray images without distortion are obtained for objects with different materials and densities. The findings motivate research in wearable X-ray detectors for medical radiography and dose monitoring.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Applied
Dou Zhao, Donghao Ma, Meng Xu, Linyue Liu, Yang Li, Fangpei Li, BinBin Zhang, Menghua Zhu, Yadong Xu, Wanqi Jie
Summary: This study demonstrates the solar-blind ultraviolet detection performance of organic single crystals, specifically 4-hydroxycyanobenzene (4HCB). The wide bandgap and low dark current of 4HCB make it an important candidate for this application. Two types of detectors, sandwiched electrode (SWE) and interdigital electrode (IDE), were fabricated and measured under 254 nm-UV light. The IDE detector showed significantly higher responsivity compared to the SWE detector, due to enhanced photoconductive gain.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ruichen Bai, Bao Xiao, Fangpei Li, Xin Liu, Shouzhi Xi, Menghua Zhu, Wanqi Jie, Bin-Bin Zhang, Yadong Xu
Summary: This study reported an alternative method for growing large A(V)B(VI)C(VII) crystals using PVT. The obtained BiSeI, SbSeI, and BiSeBr single crystals exhibited excellent optical and electrical properties.
Article
Chemistry, Physical
Bao Xiao, Qihao Sun, Shiyao Wang, Leilei Ji, Yingrui Li, Shouzhi Xi, Bin-Bin Zhang, Junjie Wang, Wanqi Jie, Yadong Xu
Summary: The novel 2D Dion-Jacobson halide perovskite (BDA)CsPb2Br7 demonstrates excellent optoelectronic properties, structural diversity, and promising stability. It has a large bandgap, high resistivity, and considerable switching ratio, showing great potential for radiation detection.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Fangbao Wang, Ruichen Bai, Qihao Sun, Xin Liu, Yuanbo Cheng, Shouzhi Xi, Binbin Zhang, Menghua Zhu, Shuqing Jiang, Wanqi Jie, Yadong Xu
Summary: A CsPbBr3 single crystal with low impurity concentration and high resistivity has been successfully prepared using an inverse temperature crystallization method and a modified precursor composition. By introducing PbBr2・2DMSO adduct in the precursor solution, the resulting crystals exhibit high hole mobility and low dark current. These crystals show excellent performance in radiation detection, achieving high peak-to-valley ratio pulse height spectra and energy resolution.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Meng Xu, Menghua Zhu, Dou Zhao, Sixin Chen, Shilin Liu, Quanchao Zhang, Pei Yuan, Binbin Zhang, Paul Sellin, Wanqi Jie, Yadong Xu
Summary: Compared to inorganic counterparts, organic semiconducting (OSC) crystalline films show promise in the development of large-area and flexible ionizing radiation detectors for X-ray imaging or dosimetry. This study presents a space-confined melt process for producing highly oriented and large-area 4HCB OSC films, which exhibit high resistivity and hole mobility. The 4HCB film-based X-ray detectors demonstrate high sensitivity and on/off ratio, as well as excellent flexibility and high-resolution X-ray imaging capability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Xin Liu, Quanchao Zhang, Dou Zhao, Ruichen Bai, Yinjie Ruan, Binbin Zhang, Fangpei Li, Menghua Zhu, Wanqi Jie, Yadong Xu
Summary: This article presents a study on the preparation of high-quality and high-yield hybrid perovskite FAPbBr3 single crystals using a solution growth method. By optimizing the growth conditions and seed behaviors, the authors successfully obtained large-size, well-shaped, and high-yield FAPbBr3 single crystals.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Astronomy & Astrophysics
Yi-Han Iris Yin, Bin-Bin Zhang, Hui Sun, Jun Yang, Yacheng Kang, Lijing Shao, Yu-Han Yang, Bing Zhang
Summary: This study explores the rarity of the GRB 211211A burst and proposes the possibility of using gravitational wave detectors to distinguish between different types of binary systems. The research reveals a lower event rate density for GRB 211211A-like bursts compared to typical long- and short-GRB populations. According to the findings, a neutron star-black hole merger and a neutron star-white dwarf binary both have the potential to produce significant signal-to-noise ratios and can be detected by different gravitational wave detectors.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Ning Li, Chaofan Zhang, Zheyin Chen, Xin Liu, Bin-Bin Zhang
Summary: In this study, a centimeter-sized non-perovskite-phase NH4Pb2Br5 crystal was successfully grown using the solvent-volatilization crystallization method. The crystal demonstrated high and anisotropic resistivities, as well as good anisotropic performance for X-ray detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Environmental
Xin-Jia Chen, Chang-Wei Bai, Yi-Jiao Sun, Xin-Tong Huang, Bin-Bin Zhang, Yi-Shuo Zhang, Qi Yang, Jing-Hang Wu, Fei Chen
Summary: In the realm of wastewater treatment, the combined use of ferrate (Fe(VI)) and peracetic acid (PAA) as oxidants shows enhanced efficacy. However, the underlying mechanisms of their interaction at different pH levels and pollutant types are still unclear. This study investigates the complex oxidation interplay among Fe(VI)-PAA, Fe(VI)-H2O2, and standalone Fe(VI) systems, revealing that the Fe(VI)-PAA system outperforms its counterparts in degrading sulfamethoxazole pollutant at a pH of 9.0. The behavior of active species shifts with pH variations, indicating distinct degradation pathways. Understanding the role of pH is crucial in organic wastewater decontamination.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Guoqiang Xu, Xingcan Huang, Rui Shi, Yawen Yang, Pengchen Wu, Jingkun Zhou, Xinxin He, Jialin Li, Yuyang Zen, Yanli Jiao, Binbin Zhang, Jiyu Li, Guangyao Zhao, Yiming Liu, Ya Huang, Mengge Wu, Qiang Zhang, Zhihui Yang, Xinge Yu
Summary: This article introduces a passive sweat extraction strategy and self-powered monitoring system (SEMS) for sedentary individuals, particularly elders. The system extracts sweat from the body using a wearable triboelectric nanogenerator (TENG) and utilizes a sweat-activated battery (SAB) as the power source. With iontophoresis electrodes loaded with carbachol and microfluidics with biosensors, physiological information in sweat can be detected. The system offers real-time and non-invasive detection of sweat analytes in a wearable format, providing a new strategy for sweat collection and analysis for the elderly group.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Siyan Yao, Tianzhi Li, Chenyang Yue, Xiaojun Xu, Binbin Zhang, Chaofan Zhang
Summary: In this study, the crystal growth of a uranium-based heavy fermion material, UTe2, was systematically investigated. The researchers found that the growth temperature, the ratio of uranium to tellurium, and the type and amount of transport agents all have significant effects on the size and quality of UTe2 crystals. It was discovered that by using an appropriate amount of iodine as the transport agent at a certain temperature, centimetre-sized high quality UTe2 single crystals can be grown.