物理与天体物理最新文献_第10页

Collider signatures of fermionic scotogenic dark matter 费米子暗物质的对撞机特征

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-09-04 DOI: 10.1103/73xh-7hhz

Víctor Martín Lozano, G. Sanchez Garcia, and J. W. F. Valle

引用次数: 0

Layer-dependent disorder controlling shift current generation in two-dimensional centrosymmetric systems 二维中心对称系统中控制移位电流产生的层相关失序

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-09-04 DOI: 10.1103/n7z9-lq1z

Yiwei Zhao, Xiantuo Zhao, Chunmei Zhang, and Jian Zhou

{"title":"Layer-dependent disorder controlling shift current generation in two-dimensional centrosymmetric systems","authors":"Yiwei Zhao, Xiantuo Zhao, Chunmei Zhang, and Jian Zhou","doi":"10.1103/n7z9-lq1z","DOIUrl":"https://doi.org/10.1103/n7z9-lq1z","url":null,"abstract":"Layertronics is an emerging field that effectively controls various physical behaviors of two-dimensional (2D) materials and their artificial stacks. While most prior works focused on modulating the interlayer interaction and layer-dependent properties, here we investigate layer-dependent disorder (either Anderson type or magnetic exchange field) effects, which could naturally occur in realistic 2D layered materials. We show that disorder could effectively toggle the spatial symmetry statistically. While the spatially homogeneous disorder tends to enhance the spatial symmetry, layer-dependent disorder is spatially inhomogeneous and could reduce such symmetry in a statistical manner, especially breaking the intact centrosymmetry 𝒫. We further characterize such a 𝒫 breaking by the emergence of shift current, an intrinsic bulk photovoltaic effect arising from the position mismatch between the valence and conduction band centers under linearly polarized light irradiation. This is rooted from momentum space shift and is illustrated by tight-binding model simulations and first-principles calculations on the 𝒫-symmetric bilayer transition metal dichalcogenide (for on-site energy disorder) and trilayer antiferromagnetic (for magnetic exchange disorder) as exemplary platforms. The layer-dependent disorder is permissible experimentally, especially under the substrate effect. This work expands the scope of layertronics and clarifies the symmetry control of layer-disorder effect.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"33 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144987407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Extrinsic Mechanisms of Phonon Magnetic Moment 声子磁矩的外在机制

IF 8.6 1区物理与天体物理

Physical review letters Pub Date : 2025-09-04 DOI: 10.1103/6m7v-p99w

Rui Xue, Zhenhua Qiao, Yang Gao, and Qian Niu

引用次数: 0

Estimates of the dynamic structure factor for the finite temperature electron liquid via analytic continuation of path integral Monte Carlo data 用路径积分蒙特卡罗数据的解析延拓估计有限温度电子液体的动态结构因子

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-09-04 DOI: 10.1103/4d4b-kgtk

Thomas Chuna, Nicholas Barnfield, Jan Vorberger, Michael P. Friedlander, Tim Hoheisel, and Tobias Dornheim

{"title":"Estimates of the dynamic structure factor for the finite temperature electron liquid via analytic continuation of path integral Monte Carlo data","authors":"Thomas Chuna, Nicholas Barnfield, Jan Vorberger, Michael P. Friedlander, Tim Hoheisel, and Tobias Dornheim","doi":"10.1103/4d4b-kgtk","DOIUrl":"https://doi.org/10.1103/4d4b-kgtk","url":null,"abstract":"Understanding the dynamic properties of uniform electron gas (UEG) is important for numerous applications ranging from semiconductor physics to exotic warm dense matter. In this work, we apply the maximum entropy method (MEM), as implemented by Thomas Chuna et al., J. Phys. A Math. Theor. 58, 335203 (2025), to ab initio path integral Monte Carlo (PIMC) results for the imaginary-time correlation function 𝐹⁡(𝑞,𝜏) to estimate the dynamic structure factor 𝑆⁡(𝑞,𝜔) over an unprecedented range of densities at the electronic Fermi temperature. To conduct the MEM, we propose to construct the Bayesian prior 𝜇 from the PIMC data. Constructing the static approximation leads to a drastic improvement in 𝑆⁡(𝑞,𝜔) estimate over using the simpler random phase approximation (RPA) as the Bayesian prior. We present results for the strongly coupled electron liquid regime with 𝑟𝑠=50,⋯,200, which reveal a pronounced roton-type feature and an incipient double peak structure in 𝑆⁡(𝑞,𝜔) for intermediate wave numbers at 𝑟𝑠=200. We also find that our dynamic structure factors satisfy known sum rules, even though these sum rules are not enforced explicitly. To verify our results, we show that our MEM estimates converge to the RPA limit at higher densities and weaker coupling and 5. Further, we compare with two different existing results at intermediate density and coupling strength and 20, and we find good agreement with more conservative estimates. Combining all of our results for , we present estimates of a dispersion relation that show a continuous deepening of its minimum value at higher coupling. An advantage of our setup is that it is not specific to the UEG, thereby opening up new avenues to study the dynamics of real warm dense matter systems based on cutting-edge PIMC simulations in future works.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"8 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144987477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Elastically buckled film-substrate system as a two-dimensional crystal 弹性屈曲薄膜-衬底体系作为二维晶体

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-09-04 DOI: 10.1103/96bg-xbc1

Wenqing Zhu (朱文清)

引用次数: 0

Terahertz Field Control of Electronic-Ferroelectric Anisotropy at Room Temperature in LuFe2⁢O4 室温下铁铁电各向异性的太赫兹场控制

IF 8.6 1区物理与天体物理

Physical review letters Pub Date : 2025-09-04 DOI: 10.1103/fryl-jjnj

Hirotake Itoh, Ryusei Minakami, Hongwu Yu, Ryohei Tsuruoka, Tatsuya Amano, Yohei Kawakami, Shin-ya Koshihara, Kosuke Fujiwara, Naoshi Ikeda, Yoichi Okimoto, and Shinichiro Iwai

{"title":"Terahertz Field Control of Electronic-Ferroelectric Anisotropy at Room Temperature in LuFe2⁢O4","authors":"Hirotake Itoh, Ryusei Minakami, Hongwu Yu, Ryohei Tsuruoka, Tatsuya Amano, Yohei Kawakami, Shin-ya Koshihara, Kosuke Fujiwara, Naoshi Ikeda, Yoichi Okimoto, and Shinichiro Iwai","doi":"10.1103/fryl-jjnj","DOIUrl":"https://doi.org/10.1103/fryl-jjnj","url":null,"abstract":"Electronic ferroelectrics, with polarization 𝑷 induced by strongly correlated charges, are expected to show ultrafast, huge, and flexible responses required in future optoelectronics. Although the challenges for ultrafast manipulation of such a polarization are ongoing, the expected advantages have been unclear. In this Letter, we demonstrate an unprecedentedly large increase by a factor of 2.7 in optical second harmonic generation at room temperature in the prototypical electronic ferroelectrics, the rare-earth ferrite LuFe2⁢O4, by applying a terahertz field of 260 kV/cm. The transient anisotropy indicates that the direction of macroscopic polarization can be controlled three dimensionally on subpicosecond timescales, offering additional degrees of freedom in controlling polarization. Although the polarization response is in phase concerning the terahertz field, its sensitivity increased with delay, indicating that cooperative interactions among microscopic domains play an important role in the unprecedented response.","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"780 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144987435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Elliptic Leading Singularities and Canonical Integrands 椭圆前导奇异性与正则积分

IF 8.6 1区物理与天体物理

Physical review letters Pub Date : 2025-09-04 DOI: 10.1103/4fjc-lfnx

E. Chaubey and V. Sotnikov

引用次数: 0

Free-carrier screening unlocks high electron mobility in ultrawide bandgap semiconductor CaSnO3 自由载流子筛选解锁了超宽带隙半导体CaSnO3的高电子迁移率

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-09-04 DOI: 10.1063/5.0282908

Jiayi Gong, Chuanyu Zhang, Wenjie Hu, Jin-Jian Zhou

{"title":"Free-carrier screening unlocks high electron mobility in ultrawide bandgap semiconductor CaSnO3","authors":"Jiayi Gong, Chuanyu Zhang, Wenjie Hu, Jin-Jian Zhou","doi":"10.1063/5.0282908","DOIUrl":"https://doi.org/10.1063/5.0282908","url":null,"abstract":"Alkaline earth stannates have emerged as promising transparent conducting oxides due to their wide bandgaps and high room-temperature electron mobilities. Among them, CaSnO3 possesses the widest bandgap, yet reported mobilities vary widely and are highly sample-dependent, leaving its intrinsic limit unclear. Here, we present ab initio calculations of electron mobility in CaSnO3 across a range of temperatures and doping levels, using state-of-the-art methods that explicitly account for free-carrier screening in electron-phonon interactions. We identify the dominant limiting mechanism to be the long-range longitudinal optical phonon scattering, which is significantly suppressed at high doping due to free-carrier screening, leading to enhanced phonon-limited mobility. While ionized impurity scattering emerges as a competing mechanism at carrier concentrations up to ∼ 1020 cm−3, the phonon scattering reduction dominates, yielding a net mobility increase with predicted room-temperature values reaching about twice the highest experimental report. Our work highlights the substantial untapped conductivity in CaSnO3, establishing it as a compelling ultrawide bandgap semiconductor for transparent and high-power electronic applications.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"15 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Emission quantum coherence and interference of excitons in cuprous oxide 氧化亚铜中激子的发射量子相干性和干涉

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-09-04 DOI: 10.1063/5.0247818

Qian-Ni Zhou, Yun-Ke Zhou, Xiang Long, Hong-Hua Fang, Hong-Bo Sun

引用次数: 0

Nanoscale lithium evaporation and behavior in a superconducting linear accelerator of a future fusion neutron source A-FNS 未来聚变中子源a - fns超导直线加速器中纳米级锂的蒸发和行为

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-09-04 DOI: 10.1016/j.nima.2025.170989

Takashi Ebisawa , Satoshi Sato , Makoto Oyaizu , Hiroshi Sakai , Eiji Kako

{"title":"Nanoscale lithium evaporation and behavior in a superconducting linear accelerator of a future fusion neutron source A-FNS","authors":"Takashi Ebisawa , Satoshi Sato , Makoto Oyaizu , Hiroshi Sakai , Eiji Kako","doi":"10.1016/j.nima.2025.170989","DOIUrl":"10.1016/j.nima.2025.170989","url":null,"abstract":"<div><div>The fusion neutron source (A-FNS) project is underway at the Rokkasho Institute for Fusion Energy, QST, in Japan. The A-FNS will conduct fusion neutron irradiation tests of fusion reactor materials. A high-intensity deuteron (D) beam accelerator with a Li target has been designed to produce large amounts of neutrons by the D-Li reaction.</div><div>The A-FNS linac comprises a superconducting linac and a free-surface liquid Li target. Because the degradation of superconducting radio-frequency (SRF) cavities by Li contamination is of concern, a dedicated beam line design for reducing Li back streaming and a study of the Li behavior in ultra-high vacuum (UHV) are necessary. However, the relationship between the SRF performance and Li contamination remains unclear. To clarify this, we designed a nanoscale Li evaporation system to inject Li vapor into SRF cavities and investigated the behavior of the Li vapor.</div><div>This paper reports the development and operational results of the nanoscale Li evaporation apparatus.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170989"},"PeriodicalIF":1.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996777","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