物理与天体物理最新文献_第9页

Curtain lowers on directly detectable higgsino dark matter

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-04 DOI: 10.1103/physrevd.111.075004

Stephen P. Martin

引用次数: 0

Shot-noise power from a topological superconductor with chiral symmetry

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-04-04 DOI: 10.1016/j.aop.2025.170013

Marília S.M. Barros, Isacc A. Saturno Junior, Edson M. Alves, Edivan A. da Silva, Ailton F. Macedo Junior, Antonio R. de C. Romaguera, Anderson L.R. Barbosa

引用次数: 0

Frustration-induced skyrmion crystals in centrosymmetric magnets.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-04 DOI: 10.1088/1361-648X/adbf5b

Hikaru Kawamura

{"title":"Frustration-induced skyrmion crystals in centrosymmetric magnets.","authors":"Hikaru Kawamura","doi":"10.1088/1361-648X/adbf5b","DOIUrl":"10.1088/1361-648X/adbf5b","url":null,"abstract":"Recent theoretical and experimental studies on the frustration-induced skyrmion crystal (SkX) in centrosymmetric magnets are reviewed, with some emphasis on their symmetry and topological aspects. Special importance of frustration and chirality is highlighted. Theories cover the studies based on both the spin models and the electronic models. In the former, the frustrated Heisenberg models on the triangular or the square lattices interacting either via the long-range RKKY interaction or via the competing short-range exchange interactions are treated, where frustration is borne by the oscillating nature of the long-range RKKY interaction or by the competition between the shorter-range exchange interactions. Special attention is paid to the role played by the magnetic anisotropy including the dipolar interaction. The electronic models discussed are mainly the Kondo lattice model on the triangular lattice, which reduces to the RKKY Heisenberg in the weak-coupling limit. Experiments on centrosymmetric SkX-hosting magnets cover the hexagonal or trigonal magnets Gd2PdSi3(triangular) and Gd3Ru4Al12(breathing kagome), and the tetragonal magnets GdRu2Si2and EuAl4. Various experimental data, including magnetization or susceptibility, specific heat, Hall resistivity, resonant magneticx-ray scattering, neutron scattering, Lorentz transmission electron microscopy, etc are reviewed and discussed in conjunction with the theoretical results. The nature of a variety of phases surrounding the SkX phase in the phase diagram, many of which are of multiple-qcharacter, is also examined. Finally, some discussion is given about the physical origin of the centrosymmetric SkX formation, its unique features in comparison with the non-centrosymmetric SkX induced by the antisymmetric Dzaloshinskii-Moriya interaction, together with some open and challenging problems for the future.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605266","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

Ultra-wide band gap and large exciton effect in 2D ferrovalley material H-FeCl₂.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-04-04 DOI: 10.1088/1361-648X/adc4a8

Chaobo Luo, Daxiang Chen, Zongyu Huang, Wenchao Liu, Zhihui Jiang, Landong Xiao, Gencai Guo, Xiang Qi, Xiangyang Peng

{"title":"Ultra-wide band gap and large exciton effect in 2D ferrovalley material H-FeCl2.","authors":"Chaobo Luo, Daxiang Chen, Zongyu Huang, Wenchao Liu, Zhihui Jiang, Landong Xiao, Gencai Guo, Xiang Qi, Xiangyang Peng","doi":"10.1088/1361-648X/adc4a8","DOIUrl":"10.1088/1361-648X/adc4a8","url":null,"abstract":"Ferrovalley materials are valleytronic materials with intrinsic ferromagnetism, in which the presence of spontaneous valley polarization is more conducive to practical applications. The optical properties of ferrovalley are important for selectively exciting electrons at the valley. In this paper, the electronic and optical spectrum of the H-phase FeCl2monolayer is studied using first-principles calculations as an example. We use hybrid functional HSE06 and GW0methods with spin-orbit coupling for our calculations, the band gap of H-FeCl2is about 3.975 and 4.072 eV at K and -K valley, which is significantly larger than that obtained by the PBE method, with a 97 meV valley splitting. It is shown that the monolayer H-FeCl2is a ferrovalley material with an ultra-wide band gap and large intrinsic valley polarization, which has strong electronic correlation and many-body effects. Calculation of the imaginary part of the dielectric function using GW-BSE method shows that the energy corresponding to the exciton peak is 2.421 and 2.491 eV, much smaller than the GW band gap. The exciton binding energy is about 1.554 and 1.581 eV at K and -K valley, indicating a large exciton effect. And the exciton binding energy of the two valleys are unequal, with a difference of 27 meV. It is found that splitting occurs at the first exciton peak in the ferrovalley material, and the splitting value is inequivalent to the bandgap splitting at the valley, which is instructive for further research as well as application of the valleytronics.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143700814","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

Enhanced thermoelectric performance by Hf substitution in p-type half-Heusler TiNi0.8Co0.2Sn

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-04-04 DOI: 10.1063/5.0257112

Masashi Mikami, Hidetoshi Miyazaki, Yoichi Nishino

{"title":"Enhanced thermoelectric performance by Hf substitution in p-type half-Heusler TiNi0.8Co0.2Sn","authors":"Masashi Mikami, Hidetoshi Miyazaki, Yoichi Nishino","doi":"10.1063/5.0257112","DOIUrl":"https://doi.org/10.1063/5.0257112","url":null,"abstract":"The half-Heusler TiNiSn alloy is a promising candidate for thermoelectric power generation, capable of directly converting waste heat into electric power, due to its high thermoelectric performance over a wide temperature range from 500 to 1000 K. However, the thermoelectric performance of p-type TiNiSn is much lower than that of its n-type counterpart. Here, we demonstrate that Hf substitution in the p-type half-Heusler TiNi0.8Co0.2Sn alloy significantly enhances thermoelectric performance within the miscibility gap region of the binary TiNiSn-HfNiSn phase diagram. The Seebeck coefficient, which is below 80 μV/K for TiNi0.8Co0.2Sn, is substantially improved to 170 μV/K in Ti0.5Hf0.5Ni0.8Co0.2Sn at 650 K, owing to modifications in the electronic band structure induced by Hf substitution. Moreover, the lattice distortion and point defects introduced by Hf substitution effectively reduce thermal conductivity, from 5.0 W/mK for TiNi0.8Co0.2Sn to 3.3 W/mK for Ti0.5Hf0.5Ni0.8Co0.2Sn at 900 K. Consequently, the thermoelectric figure of merit (ZT) significantly increases from 0.03 for TiNi0.8Co0.2Sn to 0.26 for Ti0.5Hf0.5Ni0.8Co0.2Sn at 800 K. This enhancement of thermoelectric performance in p-type TiNiSn enables the construction of thermoelectric modules composed solely of half-Heusler TiNiSn based alloys, which are expected to exhibit high thermal stability useful for long-term thermoelectric power generation.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"89 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775425","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

Large Deviations and Additivity Principle for the Open Harmonic Process

IF 2.2 1区物理与天体物理

Communications in Mathematical Physics Pub Date : 2025-04-04 DOI: 10.1007/s00220-025-05271-z

Gioia Carinci, Chiara Franceschini, Rouven Frassek, Cristian Giardinà, Frank Redig

引用次数: 0

Deterministic Parity-Time Symmetry Single-Mode Oscillation in Filterless Multimode Resonators (Laser Photonics Rev. 19(7)/2025)

IF 9.8 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-04-04 DOI: 10.1002/lpor.202570026

Huashan Yang, Shifeng Liu, Mingzhen Liu, Peng Liu, Hao Zhang, Jijun He, Shilong Pan

引用次数: 0

Heterostructure-induced modulation of optical anisotropy in ReSe2

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-04-04 DOI: 10.1063/5.0261664

Zhihao Zhang, Yang Zhang, Ling-xiu Chen, Xiaoxiao Wang, Shenbo Zhu, Yue Yu, Xiao-lan Xue, Chuan-lei Jia, Li-wei Shi

引用次数: 0

Low-Depth Unitary Quantum Circuits for Dualities in One-Dimensional Quantum Lattice Models 一维量子晶格模型中二元性的低深度单元量子电路

IF 8.6 1区物理与天体物理

Physical review letters Pub Date : 2025-04-04 DOI: 10.1103/physrevlett.134.130403

Laurens Lootens, Clement Delcamp, Dominic Williamson, Frank Verstraete

{"title":"Low-Depth Unitary Quantum Circuits for Dualities in One-Dimensional Quantum Lattice Models","authors":"Laurens Lootens, Clement Delcamp, Dominic Williamson, Frank Verstraete","doi":"10.1103/physrevlett.134.130403","DOIUrl":"https://doi.org/10.1103/physrevlett.134.130403","url":null,"abstract":"A systematic approach to dualities in symmetric (</a:mo>1</a:mn>+</a:mo>1</a:mn>)</a:mo>d</a:mi></a:mrow></a:math> quantum lattice models has recently been proposed in terms of module categories over the symmetry fusion categories. By characterizing the nontrivial way in which dualities intertwine closed boundary conditions and charge sectors, these can be implemented by unitary matrix product operators. In this Letter, we explain how to turn such duality operators into unitary linear depth quantum circuits via the introduction of ancillary degrees of freedom that keep track of the various sectors. The linear depth is consistent with the fact that these dualities change the phase of the states on which they act. When supplemented with measurements, we show that dualities with respect to symmetries encoded into nilpotent fusion categories can be realized in constant depth. The resulting circuits can for instance be used to efficiently prepare short- and long-range entangled states or map between different gapped boundaries of <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><f:mrow><f:mo stretchy=\"false\">(</f:mo><f:mn>2</f:mn><f:mo>+</f:mo><f:mn>1</f:mn><f:mo stretchy=\"false\">)</f:mo><f:mi mathvariant=\"normal\">d</f:mi></f:mrow></f:math> topological models. Published by the American Physical Society 2025 ","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"34 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782966","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

Shape-recovering liquids

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-04-04 DOI: 10.1038/s41567-025-02865-1

Anthony Raykh, Joseph D. Paulsen, Alex McGlasson, Chaitanya Joshi, Timothy J. Atherton, Hima Nagamanasa Kandula, David A. Hoagland, Thomas P. Russell

引用次数: 0