Journal of Nonlinear Optical Physics & Materials最新文献_第4页

Renormalized phonon spectrum in the Su–Schrieffer–Heeger model Su-Schrieffer-Heeger模型中的重整声子谱

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-05-19 DOI: 10.1088/2515-7639/acd723

Stepan Fomichev, M. Berciu

引用次数: 0

How to grow single-crystalline and epitaxial NiTi films in (100)- and (111)-orientation 如何在(100)-和(111)取向上生长单晶和外延NiTi薄膜

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-05-16 DOI: 10.1088/2515-7639/acd604

K. Lünser, A. Undisz, K. Nielsch, S. Fähler

{"title":"How to grow single-crystalline and epitaxial NiTi films in (100)- and (111)-orientation","authors":"K. Lünser, A. Undisz, K. Nielsch, S. Fähler","doi":"10.1088/2515-7639/acd604","DOIUrl":"https://doi.org/10.1088/2515-7639/acd604","url":null,"abstract":"Understanding the martensitic microstructure in nickel–titanium (NiTi) thin films helps to optimize their properties for applications in microsystems. Epitaxial and single-crystalline films can serve as model systems to understand the microstructure, as well as to exploit the anisotropic mechanical properties of NiTi. Here, we analyze the growth of NiTi on single-crystalline MgO(100) and Al2O3(0001) substrates and optimize film and buffer deposition conditions to achieve epitaxial films in (100)- and (111)-orientation. On MgO(100), we compare the transformation behavior and crystal quality of (100)-oriented NiTi films on different buffer layers. We demonstrate that a vanadium buffer layer helps to decrease the low-angle grain boundary density in the NiTi film, which inhibits undesired growth twins and leads to higher transformation temperatures. On Al2O3(0001), we analyze the orientation of a chromium buffer layer and find that it grows (111)-oriented only in a narrow temperature range around 500 ∘C. By depositing the Cr buffer below the NiTi film, we can prepare (111)-oriented, epitaxial films with transformation temperatures above room temperature. Transmission electron microscopy confirms a martensitic microstructure with Guinier Preston-zone precipitates at room temperature. We identify the deposition conditions to approach the ideal single crystalline state, which is beneficial for the analysis of the martensitic microstructure and anisotropic mechanical properties in different film orientations.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"22 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75096843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A study of breather lump wave, rogue wave, periodic cross kink wave, multiwave, M-shaped rational and their interactions for generalized nonlinear Schrödinger equation 广义非线性Schrödinger方程的呼吸块状波、异常波、周期交叉扭结波、多波、m形有理及其相互作用研究

4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-05-13 DOI: 10.1142/s0218863523500595

Aly R. Seadawy, Syed T. R. Rizvi, None Nimra

引用次数: 0

Second-harmonic generation in polycrystalline ZnSe in the absence of phase matching 无相匹配时多晶ZnSe中二次谐波的产生

4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-05-13 DOI: 10.1142/s0218863523500601

R. Shahin, A. P. Savikin, O. V. Martynova, S. V. Kurashkin, D. V. Savin

引用次数: 0

Wet-jet milling exfoliated hexagonal boron nitride as industrial anticorrosive pigment for polymeric coatings 湿喷磨脱片状六方氮化硼用于聚合物涂料的工业防腐颜料

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-04-27 DOI: 10.1088/2515-7639/acd0d8

M. Molina-García, S. Bellani, A. E. Del Río Castillo, Irene Conticello, Luca Gabatel, M. Zappia, Matilde Eredia, Sanjay B Thorat, B. Martín‐García, L. Ceseracciu, Marco Piccinni, F. Bonaccorso

{"title":"Wet-jet milling exfoliated hexagonal boron nitride as industrial anticorrosive pigment for polymeric coatings","authors":"M. Molina-García, S. Bellani, A. E. Del Río Castillo, Irene Conticello, Luca Gabatel, M. Zappia, Matilde Eredia, Sanjay B Thorat, B. Martín‐García, L. Ceseracciu, Marco Piccinni, F. Bonaccorso","doi":"10.1088/2515-7639/acd0d8","DOIUrl":"https://doi.org/10.1088/2515-7639/acd0d8","url":null,"abstract":"The incorporation of inorganic nanofillers into polymeric matrices represents an effective strategy for the development of smart coatings for corrosion protection of metallic substrates. In this work, wet-jet milling exfoliation was used to massively produce few-layer hexagonal boron nitride (h-BN) flakes as a corrosion-protection pigment in polyisobutylene (PIB)-based composite coatings for marine applications. This approach represents an innovative advance in the application of two-dimensional (2D) material-based composites as corrosion protection systems at the industrial scale. Although rarely used as an organic coating, PIB was selected as a ground-breaking polymeric matrix for our h-BN-based composite coating thanks to its excellent barrier properties. The optimization of the coating indicates that 5 wt.% is the most effective h-BN content, yielding a corrosion rate of the protected structural steel as low as 7.4 × 10−6 mm yr−1. The 2D morphology and hydrophobicity of the h-BN flakes, together with the capability of PIB to act as a physical barrier against corrosive species, are the main reasons behind the excellent anticorrosion performance of our composite coating.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"68 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78931784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Infernal and exceptional edge modes: non-Hermitian topology beyond the skin effect 无边界和特殊边缘模式:非厄米拓扑超越蒙皮效应

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-04-26 DOI: 10.1088/2515-7639/acf2ca

Marco Michael Denner, T. Neupert, F. Schindler

{"title":"Infernal and exceptional edge modes: non-Hermitian topology beyond the skin effect","authors":"Marco Michael Denner, T. Neupert, F. Schindler","doi":"10.1088/2515-7639/acf2ca","DOIUrl":"https://doi.org/10.1088/2515-7639/acf2ca","url":null,"abstract":"The classification of point gap topology in all local non-Hermitian (NH) symmetry classes has been recently established. However, many entries in the resulting periodic table have only been discussed in a formal setting and still lack a physical interpretation in terms of their bulk-boundary correspondence. Here, we derive the edge signatures of all two-dimensional phases with intrinsic point gap topology. While in one dimension point gap topology invariably leads to the NH skin effect, NH boundary physics is significantly richer in two dimensions. We find two broad classes of non-Hermitian edge states: (1) infernal points, where a skin effect occurs only at a single edge momentum, while all other edge momenta are devoid of edge states. Under semi-infinite boundary conditions, the point gap thereby closes completely, but only at a single edge momentum. (2) NH exceptional point dispersions, where edge states persist at all edge momenta and furnish an anomalous number of symmetry-protected exceptional points. Surprisingly, the latter class of systems allows for a finite, non-extensive number of edge states with a well defined dispersion along all generic edge terminations. Concomitantly, the point gap only closes along the real and imaginary eigenvalue axes, realizing a novel form of NH spectral flow.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"18 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78929638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Magnetic Li–M (M = Ni, Ni0.8Cu0.2, Cr) layered oxides nanoparticles for Li-ion batteries electrodes 磁性Li-M (M = Ni, Ni0.8Cu0.2, Cr)层状氧化物纳米颗粒用于锂离子电池电极

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-04-24 DOI: 10.1088/2515-7639/accfbf

M. Solzi, F. Cugini, S. Scaravonati, G. Galli, D. Pontiroli, G. Attolini, T. Besagni, G. Delgado, V. Sagredo

引用次数: 0

Magnetic-field-controlled growth of magnetoelastic phase domains in FeRh FeRh中磁弹性相域的磁场控制生长

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-04-19 DOI: 10.1088/2515-7639/acce6f

J. A. Arregi, Friederike Ringe, Jan Hajduček, O. Gomonay, Toma Molnar, Jiří Jaskowiec, V. Uhlíř

{"title":"Magnetic-field-controlled growth of magnetoelastic phase domains in FeRh","authors":"J. A. Arregi, Friederike Ringe, Jan Hajduček, O. Gomonay, Toma Molnar, Jiří Jaskowiec, V. Uhlíř","doi":"10.1088/2515-7639/acce6f","DOIUrl":"https://doi.org/10.1088/2515-7639/acce6f","url":null,"abstract":"Magnetic phase transition materials are relevant building blocks for developing green technologies such as magnetocaloric devices for solid-state refrigeration. Their integration into applications requires a good understanding and controllability of their properties at the micro- and nanoscale. Here, we present an optical microscopy study of the phase domains in FeRh across its antiferromagnetic–ferromagnetic phase transition. By tracking the phase-dependent optical reflectivity, we establish that phase domains have typical sizes of a few microns for relatively thick epitaxial films (200 nm), thus enabling visualization of domain nucleation, growth, and percolation processes in great detail. Phase domain growth preferentially occurs along the principal crystallographic axes of FeRh, which is a consequence of the elastic adaptation to both the substrate-induced stress and laterally heterogeneous strain distributions arising from the different unit cell volumes of the two coexisting phases. Furthermore, we demonstrate a magnetic-field-controlled directional growth of phase domains during both heating and cooling, which is predominantly linked to the local effect of magnetic dipolar fields created by the alignment of magnetic moments in the emerging (disappearing) FM phase fraction during heating (cooling). These findings highlight the importance of the magnetoelastic character of phase domains for enabling the local control of micro- and nanoscale phase separation patterns using magnetic fields or elastic stresses.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"15 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79075352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

P3HT vs Spiro-OMeTAD as a hole transport layer for halide perovskite indoor photovoltaics and self-powering of motion sensors P3HT vs Spiro-OMeTAD作为卤化物钙钛矿室内光伏和运动传感器自供电的空穴传输层

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-04-05 DOI: 10.1088/2515-7639/accaaa

Shaoyang Wang, Byeong-Cheol Kang, Sang-joon Park, T. Ha, L. Krishnan Jagadamma

{"title":"P3HT vs Spiro-OMeTAD as a hole transport layer for halide perovskite indoor photovoltaics and self-powering of motion sensors","authors":"Shaoyang Wang, Byeong-Cheol Kang, Sang-joon Park, T. Ha, L. Krishnan Jagadamma","doi":"10.1088/2515-7639/accaaa","DOIUrl":"https://doi.org/10.1088/2515-7639/accaaa","url":null,"abstract":"Recent years have witnessed the emergence of indoor photovoltaic (PV) devices with the rapid development of the Internet of things technology field. Among the candidates for indoor PVs, halide perovskites are attracting enormous attention due to their outstanding optoelectronic properties suitable for indoor light harvesting. Here we investigated the indoor PV properties of CH3NH3PbI3-based devices using Spiro-OMeTAD and P3HT as the hole transport layers. The Spiro-OMeTAD-based devices show a consistently higher power conversion efficiency under indoor illumination and 1 sun, with the champion devices showing a power conversion efficiency of 21.0% and 30.1% for the forward and reverse scan under 1000 lux warm white LED illumination. Fewer trap states and higher carrier lifetime were revealed for Spiro-OMeTAD based devices compared to P3HT. The best-performed Spiro-OMeTAD-based devices are used to self-power a wearable motion sensor, which could detect human motion in real-time, to create a primary sensor system with independent power management. By attaching the Spiro-OMeTAD indoor PV device to the strain sensor, the sensor exhibits an accurate and sensitive response with finger bending movements with good repeatability and negligible degradation of mechanical stability, which indicates the success of sensor powering with the indoor PV device.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"136 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76400441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Synthesis and anisotropic magnetic properties of LiCrTe 2 single crystals with a triangular-lattice antiferromagnetic structure 具有三角形晶格反铁磁结构的LiCrTe 2单晶的合成及其各向异性磁性

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-04-04 DOI: 10.1088/2515-7639/acd27a

C. Witteveen, E. Nocerino, Sara A. López-Paz, H. Jeschke, V. Pomjakushin, M. Månsson, F. V. von Rohr

{"title":"Synthesis and anisotropic magnetic properties of LiCrTe 2 single crystals with a triangular-lattice antiferromagnetic structure","authors":"C. Witteveen, E. Nocerino, Sara A. López-Paz, H. Jeschke, V. Pomjakushin, M. Månsson, F. V. von Rohr","doi":"10.1088/2515-7639/acd27a","DOIUrl":"https://doi.org/10.1088/2515-7639/acd27a","url":null,"abstract":"We report on the synthesis of LiCrTe 2 single crystals and on their anisotropic magnetic properties. We have obtained these single crystals by employing a Te/Li-flux synthesis method. We find LiCrTe 2 to crystallize in a TlCdS 2 -type structure with cell parameters of a = 3.9512(5) Å and c = 6.6196(7) Å at T = 175 K. The content of lithium in these crystals was determined to be neary stoichiometric by means of neutron diffraction. We find a pronounced magnetic transition at TNab = 144 K and TNc = 148 K, respectively. These transition temperatures are substantially higher than earlier reports on polycrystalline samples. We have performed neutron powder diffraction measurements that reveal that the long-range low-temperature magnetic structure of single crystalline LiCrTe 2 is an A-type antiferromagnetic structure. Our DFT calculations are in good agreement with these experimental observations. We find the system to be easy axis with moments oriented along the c-direction experimentally as well as in our calculations. Thereby, the magnetic Hamiltonian can be written as H=HHeisenberg+∑iKc(Siz)2 with Kc=−0.34 K (where |Sz|=32 ). We find LiCrTe 2 to be highly anisotropic, with a pronounced metamagnetic transition for H⊥ab with a critical field of μHMM (5 K) ≈ 2.5 T. Using detailed orientation-dependent magnetization measurements, we have determined the magnetic phase diagram of this material. Our findings suggest that LiCrTe 2 is a promising material for exploring the interplay between crystal structure and magnetism, and could have potential applications in spin-based 2D devices.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"53 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90385461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0