Journal of Physics: Condensed Matter最新文献_第3页

Electromagnetism and thermostability of Cr₇C₃synthesised with high-temperature and high-pressure quenching method.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-28 DOI: 10.1088/1361-648X/adaf65

Yu Zekun, Chao Zhou, Kuo Bao, Zhaoqing Wang, Pinwen Zhu, Qiang Tao, Tian Cui

{"title":"Electromagnetism and thermostability of Cr7C3synthesised with high-temperature and high-pressure quenching method.","authors":"Yu Zekun, Chao Zhou, Kuo Bao, Zhaoqing Wang, Pinwen Zhu, Qiang Tao, Tian Cui","doi":"10.1088/1361-648X/adaf65","DOIUrl":"https://doi.org/10.1088/1361-648X/adaf65","url":null,"abstract":"The interactions between the carbon skeleton and the metal atoms of a binary transition metal carbide (BTMC) are particular interest for industrial applications with openning physics and chemitry questions, especially in magnetoelectric (ME) functional materials and cemented carbides. Chromium and carbon BTMCs are a series of intermetallic compounds with typical chemical formulas and sharepolycrystalline powder c somehromium special characteristics.and carbon as precursors, In this paper,and synthesized s we usedingle-phase bluk Cr7C3 (orthorhombic, with space group: Pnma) with high density and good crystallinity by means of high-temperature and high-pressure quenching method (HTHPQM). We studied the material properties and electronic structures of Cr7C3studied with both experimental measurements and Density Functional Theory (DFT) ab intio simulations, and found that Cr7C3 is acompaction conductor(97.2 %), with anexcellent electrical conductivitythermostability (oxidation (2.32 10×at 1175 -3K)Ω·m), relative highand a magnetic phase transition from paramagnetism to soft ferromagnetism around 50 K, and the electromagnetic propertities are chiefly due to the abundancy of the 3d electrons of Cr, and the orbital hybridization between C and Cr with their 2p and 3d electrons is the reason for the crystal sturcture and high thermostability. Therefore, the prepared Cr7C3 is multifunctional material with better application prospects, and the HPHTQM is a simple and effective mothed to prepare samples as BTMCs.&#xD.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143059452","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

Pressure induced semimetal-to-metal transition and new structure of Ta₂NiSe₅above 10 GPa. 压力诱导Ta2NiSe5在10GPa以上的半金属到金属转变和新结构。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-28 DOI: 10.1088/1361-648X/ada909

Xiaolong Gan, Han Zhang, Shuoxue Jin, Dongliang Chen, Zhiying Guo

{"title":"Pressure induced semimetal-to-metal transition and new structure of Ta2NiSe5above 10 GPa.","authors":"Xiaolong Gan, Han Zhang, Shuoxue Jin, Dongliang Chen, Zhiying Guo","doi":"10.1088/1361-648X/ada909","DOIUrl":"10.1088/1361-648X/ada909","url":null,"abstract":"Previous studies of the transition metal chalcogenide Ta2NiSe5has identified two phase transitions occurring between 0-10 GPa, involving the excitonic insulator-to-semiconductor transition at 1 GPa and the semiconductor-to-semimetal transition at 3 GPa. However, there is still a lack of in-depth research on the changes in its physical properties changes above 10 GPa. In this study, Ta2NiSe5were investigated under high-pressure conditions using high-pressure x-ray diffraction and high-pressure x-ray absorption experiments. During the experimental process, a novel phase transition from the semimetal to the metal phase was observed between 10-60 GPa, specifically between 10-14 GPa, and the structure of the new phase was determined to be P21/m through first-principles calculations. This transition mechanism is attributed to the sliding of the weakly coupled layers of Ta2NiSe5within thea-cplane, leading to changes in the crystal lattice constants and symmetry. This research fills a gap in the understanding of Ta2NiSe5's crystal structure under high pressure and contributes to the broader field of transition metal chalcogenides.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142965284","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

Micromagnetic simulations of magnon-magnon coupling in synthetic antiferromagnets with tilted magnetic anisotropy.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-28 DOI: 10.1088/1361-648X/adaf68

Xing Chen, Cuixiu Zheng, Haoxiang Xu, Yaowen Liu

{"title":"Micromagnetic simulations of magnon-magnon coupling in synthetic antiferromagnets with tilted magnetic anisotropy.","authors":"Xing Chen, Cuixiu Zheng, Haoxiang Xu, Yaowen Liu","doi":"10.1088/1361-648X/adaf68","DOIUrl":"https://doi.org/10.1088/1361-648X/adaf68","url":null,"abstract":"Hybrid magnonics has attracted extensive attention for its potential applications in quantum information processing, especially following the discovery of strong coupling in magnon-magnon hybrid systems. In this paper, we studied the coupling phenomena between the left-handed (LH) and right-handed (RH) magnon modes in synthetic antiferromagnets (SAFs) with a tilted perpendicular magnetic anisotropy (PMA). By tilting the PMA at a certain angle from the film normal, we achieved strong magnon-magnon coupling without the need for an external magnetic field. The resulting hybrid eigenmodes exhibit characteristics of a linear combination of pure LH and RH modes. In addition, micromagnetic simulations revealed in detail the gradual change of hybrid resonance modes from linear to elliptic, and eventually to circular polarization as the coupling strength gradually decreases. We also examined the effects of an applied magnetic field on the coupling strength and mechanism between the two eigenmodes. These findings provide valuable insights into magnetic dynamics within hybrid magnonic systems for spintronic applications involving magnon polarization.&#xD.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143059460","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

Comparing the winding numbers of two one-dimensional two-band topological systems by their wavefunction overlap. 通过波函数重叠比较两个一维二带拓扑系统的圈数。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-28 DOI: 10.1088/1361-648X/adab5b

Pei-Ling Huang, Chao Ma, Xiang-Long Yu, Jiansheng Wu

引用次数: 0

Conductance oscillations in helicene-based junctions.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-28 DOI: 10.1088/1361-648X/adaf67

Jorge García Inglés, Carlos Roldán Piñero, Diego Alejandro Moreno Ramos, Rafael G Uceda García Uceda, Juan Manuel Cuerva, Edmund Leary, Delia Miguel Álvarez, Linda Angela Zotti

引用次数: 0

2D Surface Optical Reflectance for use in Harsh Reactive Environments.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-28 DOI: 10.1088/1361-648X/adaf69

Johan Zetterberg, Alfred Larsson, Andrea Grespi, Sebastian Pfaff, Lisa Rämisch, Lindsay Merte, Edvin Lundgren

{"title":"2D Surface Optical Reflectance for use in Harsh Reactive Environments.","authors":"Johan Zetterberg, Alfred Larsson, Andrea Grespi, Sebastian Pfaff, Lisa Rämisch, Lindsay Merte, Edvin Lundgren","doi":"10.1088/1361-648X/adaf69","DOIUrl":"https://doi.org/10.1088/1361-648X/adaf69","url":null,"abstract":"In recent years, studies of surfaces at more realistic conditions hasadvanced significantly, leading to an increased understanding of surface dynamicsunder reaction conditions. The development has mainly been due to the developmentof new experimental techniques or new experimental approaches. Techniques such asHigh Pressure Scanning Tunneling/Force Microscopy (HPSTM/HPAFM), AmbientPressure X-ray Photo emission Spectroscopy (APXPS), Surface X-Ray Diffraction(SXRD), Polarization-Modulation InfraRed Reflection Absorption Spectroscopy (PMIRRAS)and Planar Laser Induced Fluorescence (PLIF) at semi-realistic conditionshas been used to study planar model catalysts or industrial materials under operatingconditions. 2D-Surface Optical Reflectance (2D-SOR) has recently received attentionas a useful experimental tool used in gaseous and liquid harsh conditions by providingcomplementary experimental information on planar model samples as well as being apowerful powerful experimental tool on its own. The simplicity of the approach andthe cost of the equipment makes it an attractive alternative and useful tool for surfacescience studies under reaction conditions. In this topical review, we review some recentstudies that have been promoted by the technical development in optical components,image acquisition and computational image analysis.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143059426","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

Probing the magnetic ground state of stretched diamond lattices NdTaO4 and NdNbO4: Impact of spin-orbit coupling and crystal electric field.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-28 DOI: 10.1088/1361-648X/adaf66

Jogendra Kumar, Vinod Kumar Solet, Dheeraj Ranaut, Sudhir Kumar Pandey, Kaustav Mukherjee

{"title":"Probing the magnetic ground state of stretched diamond lattices NdTaO4 and NdNbO4: Impact of spin-orbit coupling and crystal electric field.","authors":"Jogendra Kumar, Vinod Kumar Solet, Dheeraj Ranaut, Sudhir Kumar Pandey, Kaustav Mukherjee","doi":"10.1088/1361-648X/adaf66","DOIUrl":"https://doi.org/10.1088/1361-648X/adaf66","url":null,"abstract":"Magnetic systems, wherein competing degree of freedoms arising from spin orbit coupling and crystal electric field lead to non-trivial magnetic ground states, remains in the forefront of research in condensed matter physics. Here, we present a comprehensive investigation on three-dimensional rare-earth based spin systems NdTaO4 and NdNbO4, where the Nd ions sit on a stretched diamond lattice. No signatures of long-range ordering and spin freezing are observed down to 1.8 K, in both cases. The low temperature Curie-Weiss analysis indicate towards the dominance of antiferromagnetic interactions between Nd3+ spins. A three-level crystal electric field model clearly explain the nature of susceptibility curve. At low temperatures, heat capacity data exhibit two-level Schottky anomaly associated with ground state Kramer's doublet. Additionally, the low temperature magnetic behaviour is found reliable to effective spin (Jeff) = ½ ground state, suggesting the presence of quantum fluctuations in both cases. First-principle calculations reveal a significant value of orbital moment with inclusion of spin orbit coupling and reinforce the Jeff = ½ nature of the ground state.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143059487","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

Computational prediction of novel two-dimensional tungsten nitride superconductors. 新型二维氮化钨超导体的计算预测。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-27 DOI: 10.1088/1361-648X/ada7b6

J Hernández-Tecorralco, J J Ríos-Ramírez, M A Olea-Amezcua

{"title":"Computational prediction of novel two-dimensional tungsten nitride superconductors.","authors":"J Hernández-Tecorralco, J J Ríos-Ramírez, M A Olea-Amezcua","doi":"10.1088/1361-648X/ada7b6","DOIUrl":"10.1088/1361-648X/ada7b6","url":null,"abstract":"Transition metal nitrides are well-known 3D superconductor materials. However, there is a lack of knowledge related to their two-dimensional (2D) counterparts, which have several potential technological applications. In this work, we predict, using an evolutionary algorithm coupled with a first-principles approach, a set of novel 2D superconductive structures based on tungsten nitride. Through a systematic process including energetic and dynamical analysis, three thermodynamically stable compositions along with metastable compounds were studied in the following stoichiometries: W4N2, W2N2, and W2N3. Their superconductive temperature (Tc) values, estimated by means of the Eliashberg superconductive theory and the McMillan equation, range from 2.3 to 21.6 K, where the highestTcvalue corresponds to a W2N3metastable hexagonal system. A systematic analysis of the structural, electronic, vibrational and electron-phonon (e-ph) properties, allowed us to recognize the variables that modulate theTcin theses systems. The superconductive behavior is strongly affected by changes in the nitrogen density of states at Fermi level, the e-ph coupling constant and the lattice symmetry. The present results aim to encourage further theoretical and experimental efforts over non fully explored superconductors in two dimensions.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950578","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

Corrigendum: solution and solubility of H atoms at the W/Cu interface (2024J. Phys.: Condens. Matter 36 465001).

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-27 DOI: 10.1088/1361-648X/ada7b7

Y Silva-Solís, J Denis, E A Hodille, Y Ferro

{"title":"Corrigendum: solution and solubility of H atoms at the W/Cu interface (2024J. Phys.: Condens. Matter 36 465001).","authors":"Y Silva-Solís, J Denis, E A Hodille, Y Ferro","doi":"10.1088/1361-648X/ada7b7","DOIUrl":"https://doi.org/10.1088/1361-648X/ada7b7","url":null,"abstract":"Metallic interfaces are locations where hydrogen (H) is expected to segregate and lead to the formation and stabilization of defects. This work focuses on the tungsten/copper (W/Cu) interface built according to theWbcc(001)/Cuhcp(112¯0)orientation. H behavior is subsequently determined at the interface and in its vicinity with electronic structure calculations based on the density functional theory. The electronic and vibrational properties determined in this way followed a thermodynamic treatment to deliver the solubility of H as a function of the temperature and chemical potential. The 96 interstitial positions we investigated reveal that H predominantly occupies the octahedral (Oh) sites in the copper network. Reversely, H exclusively occupies the tetrahedral (Td) sites in the tungsten network. The solubility of H is higher in the interface plane where both octahedral and tetrahedral sites are occupied. Despite this work is a first step toward kinetic modeling of hydrogen transport across the W/Cu interface, we conclude that theWbcc(001)/Cuhcp(112¯0)would behave like a sink where hydrogen isotopes could accumulate.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":"37 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047046","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

Stacking ferroelectricity in two-dimensional van der Waals materials. 二维范德华材料中的铁电叠加。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-01-22 DOI: 10.1088/1361-648X/ada65a

Zhigang Gui, Li Huang

引用次数: 0