Physica B-condensed Matter最新文献

Low threshold quantum correlations via synthetic magnetism in Brillouin optomechanical system 通过布里渊光机械系统中的合成磁性实现低阈量子相关性

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-13 DOI: 10.1016/j.physb.2024.416689

D.R.K. Massembele , P. Djorwé , K.B. Emale , Jia-Xin Peng , A.-H. Abdel-Aty , K.S. Nisar

{"title":"Low threshold quantum correlations via synthetic magnetism in Brillouin optomechanical system","authors":"D.R.K. Massembele , P. Djorwé , K.B. Emale , Jia-Xin Peng , A.-H. Abdel-Aty , K.S. Nisar","doi":"10.1016/j.physb.2024.416689","DOIUrl":"10.1016/j.physb.2024.416689","url":null,"abstract":"<div><div>We propose a scheme to generate low driving threshold quantum correlations in Brillouin optomechanical system based on synthetic magnetism. Our proposal consists of a mechanical (acoustic) resonator coupled to two optical modes through the standard optomechanical radiation pressure (an electrostrictive force). The electrostrictive force that couples the acoustic mode to the optical ones striggers Backward Stimulated Brillouin Scattering (BSBS) process in the system. Moreover, the mechanical and acoustic resonators are mechanically coupled through the coupling rate <span><math><msub><mrow><mi>J</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span>, which is <span><math><mi>θ</mi></math></span>-phase modulated. Without a mechanical coupling, the generated quantum correlations, i.e., between optical and mechanical modes, require strong optomechanical and acoustic couplings. By accounting phonon hopping coupling, the synthetic magnetism is induced and the quantum correlations are generated for low coupling strengths. The generated quantum correlations display sudden death and revival phenomena, and are robust against thermal noise. Our results suggest a way for low threshold quantum correlations generation, and are useful for quantum communications, quantum sensors, and quantum computational tasks.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"697 ","pages":"Article 416689"},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Orientation dependent thermal behavior of CVD grown few layer MoS2 films CVD 生长的几层 MoS2 薄膜的取向相关热行为

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-13 DOI: 10.1016/j.physb.2024.416738

Ankita Singh, Ashish Kumar Mishra

{"title":"Orientation dependent thermal behavior of CVD grown few layer MoS2 films","authors":"Ankita Singh, Ashish Kumar Mishra","doi":"10.1016/j.physb.2024.416738","DOIUrl":"10.1016/j.physb.2024.416738","url":null,"abstract":"<div><div>Differently oriented supported MoS<sub>2</sub> nanostructures are ideal candidates for various electronic and optoelectronic applications, with their performance influenced by thermal properties and is still not comprehensively studied. In this paper, we study the temperature-dependent Raman response of CVD synthesized horizontally (H-MoS<sub>2</sub>) and vertically (V-MoS<sub>2</sub>) oriented MoS<sub>2</sub> grown over SiO<sub>2</sub>-Si substrate from 80 to 333 K. The V-MoS<sub>2</sub> shows a relatively higher peak shift, attributed to its smaller contact area with the substrate, giving it a suspended-like characteristic. Then to facilitate quantitative understanding of the non-linear temperature dependency in differently oriented MoS<sub>2</sub> films, a physical model incorporating both volume and thermal effect is employed. The greater four-phonon contribution for in-plane mode of H-MoS<sub>2</sub> compared to V-MoS<sub>2</sub> may be attributed to the larger contact area with the substrate, leading to higher-order scattering due to interface formation. Our study can be leveraged for understanding thermal response in future applications of low-power thermoelectric and optoelectronic devices.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"697 ","pages":"Article 416738"},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Unveiling unsaturated modes from multi-frequency ferromagnetic resonance using maghemite nanoparticles 利用方镁石纳米粒子揭示多频铁磁共振的不饱和模式

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-13 DOI: 10.1016/j.physb.2024.416736

M.S. Pessoa , M.A. Sousa , P.S. Moscon , J.R.C. Proveti , L.C. Merino , P.C. Morais , F. Pelegrini , M. Parise , L.C. Figueiredo , E. Baggio-Saitovitch

{"title":"Unveiling unsaturated modes from multi-frequency ferromagnetic resonance using maghemite nanoparticles","authors":"M.S. Pessoa , M.A. Sousa , P.S. Moscon , J.R.C. Proveti , L.C. Merino , P.C. Morais , F. Pelegrini , M. Parise , L.C. Figueiredo , E. Baggio-Saitovitch","doi":"10.1016/j.physb.2024.416736","DOIUrl":"10.1016/j.physb.2024.416736","url":null,"abstract":"<div><div>This study reports on the use of ferromagnetic resonance (FMR), at various microwave frequencies (1.1 GHz, 3.5 GHz, 9.4 GHz, and 33.9 GHz), to investigate nanosized maghemite-based (γ-Fe<sub>2</sub>O<sub>3</sub>) samples in both powder (P) and aqueous-based magnetic fluid (MF) presentations. The structure of the as-synthesized sample was confirmed through x-ray diffraction (XRD), revealing the maghemite phase with average diameter of about 12 nm. Analyses of the room temperature (RT) FMR spectra suggest that the samples are in a non-saturated state for microwave frequencies below about 10 GHz (X-band). Comparisons between theoretical modelling (acceptable) parameters and those obtained through fittings of the experimental data revealed significant discrepancies, highlighting an increase in divergence as the measurement condition deviates from the magnetic saturation condition, taking place at microwave frequencies below about 10 GHz.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"697 ","pages":"Article 416736"},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The magnetic properties in two-dimensional Cr2X2Y6 (X=Ge, Si; Y=Te, Se) modulated by strain and electric field 二维 Cr2X2Y6（X=Ge、Si；Y=Te、Se）中受应变和电场调制的磁性能

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-12 DOI: 10.1016/j.physb.2024.416721

Weiyang Yu , Yuling Zhang , Wen Luo , Xiaoli Zhang , Yali Wu , Rui Li , Wei-Bing Zhang

{"title":"The magnetic properties in two-dimensional Cr2X2Y6 (X=Ge, Si; Y=Te, Se) modulated by strain and electric field","authors":"Weiyang Yu , Yuling Zhang , Wen Luo , Xiaoli Zhang , Yali Wu , Rui Li , Wei-Bing Zhang","doi":"10.1016/j.physb.2024.416721","DOIUrl":"10.1016/j.physb.2024.416721","url":null,"abstract":"<div><div>Nowadays, electronic devices based on spin properties have rapidly developed, which played an important role in the field of efficient information storage and transmission. In this work, the geometric structures and magnetic properties of two-dimensional (2D) monolayer Cr<sub>2</sub>X<sub>2</sub>Y<sub>6</sub> (X = Ge, Si; Y=Se, Te) have been investigated systematically. Especially, a comparative study on the geometric structures, electronic structures, magnetic anisotropy and Curie temperature (<em>T</em><sub>c</sub>) of 2D Cr<sub>2</sub>Ge<sub>2</sub>Te<sub>6</sub> (CGT), Cr<sub>2</sub>Si<sub>2</sub>Se<sub>6</sub> (CSS) and Cr<sub>2</sub>Si<sub>2</sub>Te<sub>6</sub> (CST) have been studied. The magnetic ground state of monolayer CGT, CST and CSS is FM with out-of-plane magnetic anisotropy. The results show that CGT, CST and CSS are all semiconductors, and the band gaps with spin up (down) of CGT, CSS and CST are 0.21eV (0.68eV), 0.10eV (0.45eV), and 0.19eV (1.14eV), respectively. The <em>T</em><sub>c</sub> of monolayer CGT, CSS and CST are 61, 39 and 91 K based on mean field theory, which are 55, 34 and 78 K by Monte Carlo simulation. By applying biaxial strains, the band gap of monolayer CGT, CST and CSS increases firstly and then decreases under tensile strain, and the magnetic anisotropy changes greatly under compression strain. By employing vertical electric field, the results show that CST changes from semiconductor to semi-metal under the electric field of 0.8 V/Å, while CGT and CSS change little. The results provide theoretical basis for the development of novel spintronic devices and flexible electronic devices in future applications.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"697 ","pages":"Article 416721"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A comprehensive study of cytosine-ZnO interactions: Theoretical and experimental insights 细胞核-氧化锌相互作用的综合研究：理论与实验见解

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-12 DOI: 10.1016/j.physb.2024.416732

Niyazi Bulut , Serhat Keser , Alexandre Zanchet , Piotr S. Zuchowski , Tankut Ates , İrfan Kilic , Omer Kaygili

{"title":"A comprehensive study of cytosine-ZnO interactions: Theoretical and experimental insights","authors":"Niyazi Bulut , Serhat Keser , Alexandre Zanchet , Piotr S. Zuchowski , Tankut Ates , İrfan Kilic , Omer Kaygili","doi":"10.1016/j.physb.2024.416732","DOIUrl":"10.1016/j.physb.2024.416732","url":null,"abstract":"<div><div>This paper presents a comprehensive investigation of the adsorption of cytosine, a DNA base, on ZnO model clusters, specifically Zn<sub>2</sub>O<sub>2</sub>, Zn<sub>3</sub>O<sub>3</sub>, Zn<sub>4</sub>O<sub>4</sub>, Zn<sub>6</sub>O<sub>6</sub>, Zn<sub>8</sub>O<sub>8</sub> ring (R) and cubic rocksalt. A density functional theory (DFT) method was used to simulate the adsorption of cytosine on ZnO (C/ZnO) clusters. The B3LYP/LanL2DZ method, which includes a correction for the dispersion contribution, was used. The calculated energy gap (Eg) for cytosine showed a strong dependence on the cluster size, highlighting variations corresponding to the dimensions of the clusters. The proposed physisorption mechanism involves the formation of an N...Zn bond between cytosine and the active Zn site on ZnO. In addition, experimental data, including microscopic and spectroscopic evidence, were integrated to further elucidate the interactions between cytosine and ZnO. A composite of C and ZnO was prepared by the wet chemical method and characterised by SEM, XRD and FT-IR analyses. The interaction of cytosine with ZnO nanoparticles was observed by UV–vis spectroscopy. The experimental results were then compared with those obtained from DFT calculations, taking into account the new insights into the cytosine-ZnO interactions. This comparison provided a holistic understanding of the system.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"697 ","pages":"Article 416732"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Dynamic magnetic properties of core-shell nanoparticles in an oscillating magnetic field 振荡磁场中核壳纳米粒子的动态磁特性

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-12 DOI: 10.1016/j.physb.2024.416707

Zhen-yu Liu , Wei Wang , Dan Lv , Yu-hang Tu

引用次数: 0

The effect of guanidinium tetrafluoroborate surface passivation on the stability of 2D-PEA2SnI4 perovskite thin films prepared by sequential physical vapor deposition 四氟硼酸胍表面钝化对顺序物理气相沉积法制备的二维-PEA2SnI4 包晶薄膜稳定性的影响

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-12 DOI: 10.1016/j.physb.2024.416735

Alex Sembito , Julius M. Mwabora , Francis W. Nyongesa , Mmantsae Diale

{"title":"The effect of guanidinium tetrafluoroborate surface passivation on the stability of 2D-PEA2SnI4 perovskite thin films prepared by sequential physical vapor deposition","authors":"Alex Sembito , Julius M. Mwabora , Francis W. Nyongesa , Mmantsae Diale","doi":"10.1016/j.physb.2024.416735","DOIUrl":"10.1016/j.physb.2024.416735","url":null,"abstract":"<div><div>2D-PEA<sub>2</sub>SnI<sub>4</sub> perovskites thin films were prepared by sequential physical vapor deposition (SPVD), and passivated in vacuum using guanidinium tetrafluoroborate (GuaBF<sub>4</sub>). The effect of GuaBF<sub>4</sub> on stability, optical, morphological, electrical, and structural properties of PEA<sub>2</sub>SnI<sub>4</sub> films was investigated. The introduction of GuaBF<sub>4</sub> improved the film morphology and crystallinity with the resulting films exhibiting enlarged grain sizes and low surface roughness. Raman and FTIR results showed that GuaBF<sub>4</sub> did not change the structural phase and the functional group of the perovskite, but rather confirmed an additive-perovskite interaction. PL and carrier lifetime measurements revealed a 1.8 and 2-folds increment in intensity and lifetime respectively, attributed to suppression of non-radiative recombination in GuaBF<sub>4</sub> treated films. XRD, UV–Vis and FE-SEM stability studies showed that GuaBF<sub>4</sub> treatment significantly improved the stability of the films. This study suggests an effective strategy for deposition of solvent-free additive based 2D-Sn perovskite high quality films that are stable and reproducible.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"697 ","pages":"Article 416735"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced thermoelectric properties in Cu₁.₈Se thin films: Achieving superior power factor through phase control and optimal deposition temperature 增强铜₁.₈硒薄膜的热电特性：通过相位控制和最佳沉积温度实现优异的功率因数

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-12 DOI: 10.1016/j.physb.2024.416727

Hassan Ahmoum , Guojian Li , Youssef Mir , Qiang Wang

引用次数: 0

Influence of bismuth content on the properties of glass-ceramics with composition xBi2O3-(0.40-x)B2O3-0.15ZnO-0.45P2O5: Synthesis, structural, thermal analysis, and dielectric relaxation process 铋含量对成分为 xBi2O3-(0.40-x)B2O3-0.15ZnO-0.45P2O5 的玻璃陶瓷特性的影响：合成、结构、热分析和介电弛豫过程

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-12 DOI: 10.1016/j.physb.2024.416728

Dipankar Biswas , Debtanu Patra , Souvik Brahma Hota , Ashok Das , Nipu Modak , Rittwick Mondal , Soumyajyoti Kabi

{"title":"Influence of bismuth content on the properties of glass-ceramics with composition xBi2O3-(0.40-x)B2O3-0.15ZnO-0.45P2O5: Synthesis, structural, thermal analysis, and dielectric relaxation process","authors":"Dipankar Biswas , Debtanu Patra , Souvik Brahma Hota , Ashok Das , Nipu Modak , Rittwick Mondal , Soumyajyoti Kabi","doi":"10.1016/j.physb.2024.416728","DOIUrl":"10.1016/j.physb.2024.416728","url":null,"abstract":"<div><div>The glass-ceramics materials with the sample composition of xBi<sub>2</sub>O<sub>3</sub>-(0.40-x) B<sub>2</sub>O<sub>3</sub>-0.15ZnO-0.45P<sub>2</sub>O<sub>5</sub> (BBZP) (where x = 0.10, 0.15, 0.20, and 0.25) have been prepared using the conventional melt-quenching technique. Different nanocrystalline phases embedded inside the glass-ceramic matrix have been characterised by analysing x-ray diffraction spectra. The obtained density values as well as molar volume increases with the rise of bismuth content. The network structure of the glass ceramic samples has been investigated employing Raman spectroscopy. The DSC analysis reveals the decrease in Glass transition temperature (T<sub>g</sub>) (433K–416K), and crystallisation temperature (T<sub>c</sub>) (569K–556K) of the studied materials. The electrical properties of the samples have been investigated in the context of dielectric and modulus formalism. Different theoretical models have been employed to analyse the experimental data of dielectric and modulus spectra. The Nyquist plots of the materials have also been analyzed employing relevant models. It has been shown that the higher bismuth containing samples are highly dense with high thermal stability. Such materials also have high dielectric strength. Analysis of these performance indicators suggests the possible applications of these materials in electrochemical devices.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"697 ","pages":"Article 416728"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Temperature sensing properties of dual-laser excited Y2O3:Yb3+/Er3+/Tm3+ fluorescent crystals 双激光激发 Y2O3:Yb3+/Er3+/Tm3+ 荧光晶体的温度传感特性

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-11-12 DOI: 10.1016/j.physb.2024.416729

Yong Tang , Qiuyue Ran

引用次数: 0