Journal of Physics: Condensed Matter最新文献_第6页

Circularly polarized radiation to control the superconducting states: stability analysis. 控制超导态的圆偏振辐射：稳定性分析

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-11 DOI: 10.1088/1361-648X/ad8a57

M D Croitoru, A I Buzdin

引用次数: 0

Exploration of quantum oscillation in antiferromagnetic Weyl semimetal GdSiAl. 探索反铁磁性韦尔半金属 GdSiAl 中的量子振荡。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-11 DOI: 10.1088/1361-648X/ad912e

Priyanka Meena, Amarjyoti Choudhury, Mohit Mudgal, Sonika Bagga, Vishnu Kumar Tiwari, Sarita Rajput, C S Yadav, Vivek K Malik, Tulika Maitra, Jayita Nayak

{"title":"Exploration of quantum oscillation in antiferromagnetic Weyl semimetal GdSiAl.","authors":"Priyanka Meena, Amarjyoti Choudhury, Mohit Mudgal, Sonika Bagga, Vishnu Kumar Tiwari, Sarita Rajput, C S Yadav, Vivek K Malik, Tulika Maitra, Jayita Nayak","doi":"10.1088/1361-648X/ad912e","DOIUrl":"https://doi.org/10.1088/1361-648X/ad912e","url":null,"abstract":"GdSiAl single crystal has been investigated by means of magnetic and magneto-transport measurements and compared with ab-initio density functional theory (DFT) calculations. Significant non-saturating magnetoresistance reaching ∼ 18% at 12T and 2K was observed, alongside the presence of Shubnikov-de Haas oscillations with the fundamental frequencies 22.09T and 77.33T. Shubnikov-de Haas oscillations provide the information about the nontrivial π Berry phase in GdSiAl with the Fermi surface areas of 0.00211 Å-2and 0.00739 Å-2. Angle-dependent magnetoresistance shows anisotropy with θ, exhibiting a maximum at 180°. The magnetic susceptibility data for H ∥ c and H ⊥ c reveals that the magnetic moments of Gd3+ions orders antiferromagnetically below 32K along with an another transition occurs at ∼ 8K, which is consistent with the heat capacity measurements where a distinct λ-shaped anomaly has been observed near antiferromagnetic ordering temperature 32K. The high value of Debye temperature indicates the contribution of acoustic phonons. Electronic structure calculations suggest the existence of nested Fermi surface pockets characterized by nesting wave vectors that closely align with the observed magnetic ordering wave vector. Furthermore, DFT calculations reveal the presence of Weyl nodes in close proximity to the Fermi surface. Our findings from combined experimental and theoretical techniques indicate GdSiAl to be a potential candidate for an antiferromagnetic topological Weyl semimetal.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142622421","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

Photovoltaic effect in methylammonium lead triiodide single crystal. 甲基铵三碘化铅单晶的光伏效应。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-11 DOI: 10.1088/1361-648X/ad8b90

Volodymyr Kapustianyk, Volodymyr Kolomiets, Yuriy Eliyashevskyy, Olesia Uhrynovych

{"title":"Photovoltaic effect in methylammonium lead triiodide single crystal.","authors":"Volodymyr Kapustianyk, Volodymyr Kolomiets, Yuriy Eliyashevskyy, Olesia Uhrynovych","doi":"10.1088/1361-648X/ad8b90","DOIUrl":"https://doi.org/10.1088/1361-648X/ad8b90","url":null,"abstract":"Due to the crystalline acentricity leading to the bulk photovoltaic effect (PV) the ferroelectrics (FEs) are considered as important candidates for creation of the PV cells overcoming the Shockley-Queisser limit of semiconductors. However, this research direction still requires more investigations to develop reliable pathways for PV efficiency optimization. The recent progress in the power conversion efficiency of the cells based on the organic-based compounds such as CH3NH3PbI3perovskite attracted much attention of the scientists. Unfortunately, manufacturing of these multilayer cells implies a very complicated technology and very high price of the devices. Under such circumstances investigations of the PV effect in the single crystals of FE perovskites look very promising. In this paper we report that due to the sample illumination with intensive UV light, CH3NH3PbI3single crystal is transformed from the pristine antiFE into the FE state. As a result, the PV effect characteristic of the FEs is realized in this material. The theoretically maximal value of the power conversion efficiency in this case was found to be one of the largest among the single crystals of this class of ferroics. We also considered the ways allowing to increase the PV efficiency of the potential solar cells based on such materials.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":"37 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142622590","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

Topological and site disorder in boron nitride networks. 氮化硼网络中的拓扑和位点紊乱。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-11 DOI: 10.1088/1361-648X/ad882d

Angus Heafield, Mark Wilson

引用次数: 0

Fluids with power-law repulsion: Hyperuniformity and energy fluctuations. 具有幂律排斥力的流体：超均匀性和能量波动。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-11 DOI: 10.1088/1361-648X/ad912d

Haim Diamant, Erdal C Oguz

{"title":"Fluids with power-law repulsion: Hyperuniformity and energy fluctuations.","authors":"Haim Diamant, Erdal C Oguz","doi":"10.1088/1361-648X/ad912d","DOIUrl":"https://doi.org/10.1088/1361-648X/ad912d","url":null,"abstract":"We revisit the equilibrium statistical mechanics of a classical fluid of point-like particles with repulsive power-law pair interactions, focusing on density and energy fluctuations at finite temperature. Such long-range interactions, decaying with inter-particle distance $r$ as $1/r^s$ in $d$ dimensions, are known to fall into two qualitatively different categories. For $s<d$ (``strongly\" long-range interactions) there are screening of correlations and suppression of large-wavelength density fluctuations (hyperuniformity). These effects eliminate density modes with arbitrarily large energy. For $s>d$ (``weakly\" long-range interactions) screening and hyperuniformity do not occur. Using scaling arguments, variational analysis, and Monte Carlo simulations, we find another qualitative distinction. For $sgeq d/2$ the strong repulsion at short distances leads to enhanced small-wavelength density fluctuations, decorrelating particle positions. This prevents indefinitely negative entropy and large energy fluctuations. The distinct behaviors for $sgeq d/2$ and $s<d/2$ give rise to qualitatively different dependencies of the entropy, heat capacity, and energy fluctuations on temperature and density. We investigate the effect of introducing an upper cutoff distance in the pair-potential. The effect of the cutoff on energy fluctuations is strong for $s<d/2$ and negligible for $s geq d/2$.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142622414","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

Bruggeman homogenization of a particulate composite material comprising truncated spheres and spheroids. 对由截头球和球体组成的微粒复合材料进行布鲁格曼均质化。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-07 DOI: 10.1088/1361-648X/ad899c

Héctor M Iga-Buitrón, Tom G Mackay, Akhlesh Lakhtakia

引用次数: 0

Intergrain scattering in polycrystals. 多晶体中的晶间散射。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-04 DOI: 10.1088/1361-648X/ad7dc6

George Edwin Cragg

引用次数: 0

Electronic states bound by repulsive potentials in graphene irradiated by a circularly polarized electromagnetic field. 圆极化电磁场辐照下石墨烯中受排斥势约束的电子态。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-01 DOI: 10.1088/1361-648X/ad88c5

O V Kibis, M V Boev, I V Iorsh, V M Kovalev

引用次数: 0

Recent advances in understanding and manipulating magnetic and electronic properties of EuM₂X₂(M= Zn, Cd;X= P, As). 了解和操纵 EuM2X2（M= Zn、Cd；X= P、As）磁性和电子特性的最新进展。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-01 DOI: 10.1088/1361-648X/ad882b

Xiyu Chen, Shuai Dong, Zhi-Cheng Wang

{"title":"Recent advances in understanding and manipulating magnetic and electronic properties of EuM2X2(M= Zn, Cd;X= P, As).","authors":"Xiyu Chen, Shuai Dong, Zhi-Cheng Wang","doi":"10.1088/1361-648X/ad882b","DOIUrl":"10.1088/1361-648X/ad882b","url":null,"abstract":"Over the past five years, significant progress has been made in understanding the magnetism and electronic properties of CaAl2Si2-type EuM2X2(M= Zn, Cd;X= P, As) compounds. Prior theoretical work and experimental studies suggested that EuCd2As2had the potential to host rich topological phases, particularly an ideal magnetic Weyl semimetal state when the spins are polarized along thecaxis. However, this perspective is challenged by recent experiments utilizing samples featuring ultra-low carrier densities, as well as meticulous calculations employing various approaches. Nonetheless, the EuM2X2family still exhibit numerous novel properties that remain to be satisfactorily explained, such as the giant nonlinear anomalous Hall effect and the colossal magnetoresistance effect. Moreover, EuM2X2compounds can be transformed from semiconducting antiferromagnets to metallic ferromagnets by introducing a small number of carriers or applying external pressure, and a further increase in the ferromagnetic transition temperature can be achieved by reducing the unit cell volume. These features make the EuM2X2family a fertile platform for studying the interplay between magnetism and charge transport, and an excellent candidate for applications in spintronics. This paper presents a comprehensive review of the magnetic and transport behaviors of EuM2X2compounds with varying carrier densities, as well as the current insights into these characteristics. An outlook for future research opportunities is also provided.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142468305","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

Theoretical insights into off-stoichiometric Zr_(x)Ti_(1-x)IrSb half-Heusler alloys: a first principle calculations. 非全计量 Zr(x)Ti(1-x)IrSb 半休斯勒合金的理论见解：第一原理计算。

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2024-11-01 DOI: 10.1088/1361-648X/ad899b

Mohammed Hadbi, Kamel Demmouche, Djallal Eddine Mellah, Jose Coutinho

{"title":"Theoretical insights into off-stoichiometric Zr(x)Ti(1-x)IrSb half-Heusler alloys: a first principle calculations.","authors":"Mohammed Hadbi, Kamel Demmouche, Djallal Eddine Mellah, Jose Coutinho","doi":"10.1088/1361-648X/ad899b","DOIUrl":"10.1088/1361-648X/ad899b","url":null,"abstract":"This study presents a theoretical investigation into the phase stability, electronic, and optical properties of off-stoichiometricZrxTi1-xIrSb(x= 0, 0.0625, 0.1875, 0.25, 0.50, 0.75, 1) compounds. Using first-principles calculations, we explore how varying Zr and Ti concentrations can tune the electronic and optical properties of these half-Heusler alloys. The Structural, optical, and electronic properties were meticulously analyzed with both the GGA-PBE and Meta-GGA-SCAN approximations, as implemented in the ViennaAb initioSimulation Package (VASP). The dynamical stability of these compounds was assessed using the Phonopy package. Our findings reveal that these alloys exhibit semiconductor behavior with tunable band gaps, and their optical properties show significant variation across different compositions, particularly in the visible light range. The compounds also demonstrate robust dynamical stability, indicating their potential for practical applications in electronic and optoelectronic devices. These results underscore the versatility ofZrxTi1-xIrSballoys and highlight their promise for next-generation technology.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142468308","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