npj Quantum Materials最新文献_第10页

Interplay of vibrational, electronic, and magnetic states in CrSBr CrSBr中振动、电子和磁态的相互作用

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-16 DOI: 10.1038/s41535-026-00850-2

Daria I. Markina, Priyanka Mondal, Lukas Krelle, Sai Shradha, Mikhail M. Glazov, Regine von Klitzing, Kseniia Mosina, Zdenek Sofer, Bernhard Urbaszek

{"title":"Interplay of vibrational, electronic, and magnetic states in CrSBr","authors":"Daria I. Markina, Priyanka Mondal, Lukas Krelle, Sai Shradha, Mikhail M. Glazov, Regine von Klitzing, Kseniia Mosina, Zdenek Sofer, Bernhard Urbaszek","doi":"10.1038/s41535-026-00850-2","DOIUrl":"https://doi.org/10.1038/s41535-026-00850-2","url":null,"abstract":"The van der Waals antiferromagnet CrSBr exhibits coupling of vibrational, electronic, and magnetic degrees of freedom, giving rise to distinctive quasi-particle interactions. We investigate these interactions across a wide temperature range using polarization-resolved Raman spectroscopy at various excitation energies, complemented by optical absorption and photoluminescence excitation (PLE) spectroscopy. Under 1.96 eV excitation, we observe pronounced changes in the ({A}_{g}^{1}), ({A}_{g}^{2}), and ({A}_{g}^{3}) Raman modes near the Néel temperature, coinciding with modifications in the oscillator strength of excitonic transitions and clear resonances in PLE. The distinct temperature evolution of Raman tensor elements and polarization anisotropy of Raman modes indicates that they couple to different excitonic and electronic states. The suppression of the excitonic states' oscillation strength above the Néel temperature could be related to the magnetic phase transition, thereby connecting these excitonic states and Raman modes to a specific spin alignment. We develop a simple model that describes how magnetic order impacts excitonic states and hence the intensity and polarization of the Raman scattering signal. These observations make CrSBr a versatile platform for probing quasi-particle interactions in low-dimensional magnets and provide insights for applications in quantum sensing and quantum communication.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"38 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993492","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

Surface wet-etched Y3Fe5O12 films with perpendicular magnetic anisotropy for ultrahigh density spintronic device applications 具有垂直磁各向异性的表面湿蚀刻Y3Fe5O12薄膜用于超高密度自旋电子器件

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-12 DOI: 10.1038/s41535-026-00847-x

Shuyao Chen, Mingqian Yuan, Qixun Guo, Yunfei Xie, Dengfu Deng, Jiayi Zheng, Lintong Huang, Donghua Liu, Xuejun Yan, Ming-Hui Lu, Yan-Feng Chen, Tao Liu

引用次数: 0

Magnetization orientation-dependent Shubnikov-de Haas oscillations in ferromagnetic Weyl semimetal Co3Sn2S2 铁磁Weyl半金属Co3Sn2S2磁化取向相关的舒布尼科夫-德哈斯振荡

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-12 DOI: 10.1038/s41535-025-00844-6

Linda Ye, Jorge I. Facio, Madhav Prasad Ghimire, Mun K. Chan, Jhih-Shih You, David C. Bell, Manuel Richter, Jeroen van den Brink, Joseph G. Checkelsky

{"title":"Magnetization orientation-dependent Shubnikov-de Haas oscillations in ferromagnetic Weyl semimetal Co3Sn2S2","authors":"Linda Ye, Jorge I. Facio, Madhav Prasad Ghimire, Mun K. Chan, Jhih-Shih You, David C. Bell, Manuel Richter, Jeroen van den Brink, Joseph G. Checkelsky","doi":"10.1038/s41535-025-00844-6","DOIUrl":"https://doi.org/10.1038/s41535-025-00844-6","url":null,"abstract":"We report a study of Shubnikov–de Haas oscillations in high-quality single crystals of ferromagnetic Weyl semimetal Co3Sn2S2. The Fermi surfaces resolved in our experiments are three-dimensional and reflect an underlying trigonal crystallographic symmetry. Combined with density functional calculations, we identify that multiple Fermi surfaces in the system—of both electron and hole nature—arise from the energy dispersion of the (spin-orbit gapped) mirror-protected nodal rings. We observe an evolution of the Fermi surfaces with in-plane magnetic fields, in contrast to field perpendicular to the kagome lattice planes, which has little effect. Viewed alongside the easy-axis anisotropy of the system, our observation reveals an evolution of the electronic structure of Co3Sn2S2—including the Weyl points—with the ferromagnetic moment orientation. Through the case study of Co3Sn2S2, our results provide concrete experimental evidence of an anisotropic interplay via spin-orbit coupling between the magnetic degrees of freedom and electronic band singularities, which has long been expected in semimetallic and metallic magnetic systems.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"83 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956268","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

Manipulating the long-range strong photon-magnon coupling via a saturable gain 利用可饱和增益操纵远距离强光子-磁振子耦合

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-10 DOI: 10.1038/s41535-025-00846-4

Lijun Yan, Xinlin Mi, Yongzhang Shi, Yanxue Chen, Yue Zhao, Jinwei Rao, Lihui Bai

引用次数: 0

Control of intervalley scattering in Bi2Te3 via temperature-dependent band renormalization 通过温度依赖带重整化控制Bi2Te3的谷间散射

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-09 DOI: 10.1038/s41535-025-00842-8

A. Jabed, F. Goto, B. Frimpong, D. Armanno, A. Longa, M. Michiardi, A. Damascelli, P. Hofmann, G. Jargot, H. Ibrahim, F. Légaré, N. Gauthier, S. Beaulieu, F. Boschini

{"title":"Control of intervalley scattering in Bi2Te3 via temperature-dependent band renormalization","authors":"A. Jabed, F. Goto, B. Frimpong, D. Armanno, A. Longa, M. Michiardi, A. Damascelli, P. Hofmann, G. Jargot, H. Ibrahim, F. Légaré, N. Gauthier, S. Beaulieu, F. Boschini","doi":"10.1038/s41535-025-00842-8","DOIUrl":"https://doi.org/10.1038/s41535-025-00842-8","url":null,"abstract":"The control of out-of-equilibrium electron dynamics in topological insulators is essential to unlock their potential in next-generation quantum technologies. However, the role of temperature on the renormalization of the electronic band structure and, consequently, on out-of-equilibrium electron scattering processes is still elusive. Here, using high-resolution time- and angle-resolved photoemission spectroscopy (TR-ARPES), we show that even a modest (~15 meV) renormalization of the conduction band of Bi 2 Te 3 can critically affect bulk and surface electron scattering processes. Supported by kinetic Monte Carlo simulations, we show that temperature-induced changes in the bulk band structure modulate the intervalley electron-phonon scattering rate, reshaping the out-of-equilibrium response and the long-lasting charge accumulation at the bottom of the conduction band. This work establishes temperature as an effective control knob for engineering scattering pathways in topological insulators.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"264 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938210","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

Symmetry-engineered chiral magnetotransport in the correlated oxide SrNbO3 对称工程相关氧化物SrNbO3的手性磁输运

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-09 DOI: 10.1038/s41535-025-00845-5

Jeongkeun Song, Seoung-Hun Kang, Lucas Lindsay, Satoshi Okamoto, Yunkyu Park, Hu Miao, Jong Mok Ok, Ho Nyung Lee

{"title":"Symmetry-engineered chiral magnetotransport in the correlated oxide SrNbO3","authors":"Jeongkeun Song, Seoung-Hun Kang, Lucas Lindsay, Satoshi Okamoto, Yunkyu Park, Hu Miao, Jong Mok Ok, Ho Nyung Lee","doi":"10.1038/s41535-025-00845-5","DOIUrl":"https://doi.org/10.1038/s41535-025-00845-5","url":null,"abstract":"Chiral transport in topological materials, arising from the interplay between topology and chirality, holds significant potential for energy-efficient spintronics and quantum information technologies through dissipationless, coherent charge flow. However, the emergence of chiral transport by tuning the electronic states of novel chiral materials is largely unexplored. Here, we report chiral transport driven by correlated Dirac fermions in SrNbO 3 epitaxial thin films, where strain-induced nonsymmorphic symmetry of oxygen octahedra tunes the material from metallic to Dirac states. Such symmetry-driven Dirac fermions feature a remarkable enhancement of electron mobility and magnetoresistance. Signatures of chiral transport induced by the chiral anomaly, including negative longitudinal magnetoresistance and twofold planar Hall oscillation, are observed in the Dirac semimetallic state, whereas they are absent in the metallic state of SrNbO 3 thin films. This work highlights a crucial role of symmetry engineering in generating chiral charge transport in oxide Dirac semimetals, opening an avenue to novel oxide-based topological and quantum devices.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"45 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938211","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

Phonon bunching induced strong four-phonon scattering for low lattice thermal conductivity in layered Na2CoSe2O 低晶格热导率层状Na2CoSe2O中声子聚集诱导强四声子散射

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-08 DOI: 10.1038/s41535-025-00832-w

Bin Wei, Mengfan Chai, Chang Liu, Junyan Liu, Yongheng Li, Wenyu Zhang, Qing Wang, Erzhen Mu, Binbin Wang, Zhifang Zhou, Changpeng Lin, Xu Chen, Meihua Hu, Yunpeng Zheng, Yuan-Hua Lin

{"title":"Phonon bunching induced strong four-phonon scattering for low lattice thermal conductivity in layered Na2CoSe2O","authors":"Bin Wei, Mengfan Chai, Chang Liu, Junyan Liu, Yongheng Li, Wenyu Zhang, Qing Wang, Erzhen Mu, Binbin Wang, Zhifang Zhou, Changpeng Lin, Xu Chen, Meihua Hu, Yunpeng Zheng, Yuan-Hua Lin","doi":"10.1038/s41535-025-00832-w","DOIUrl":"https://doi.org/10.1038/s41535-025-00832-w","url":null,"abstract":"Layered oxyselenides are of interest as promising mid- to high-temperature thermoelectric applications due to their tunable electrical properties and intrinsically low lattice thermal conductivity (κ). Understanding microscopic phonon mechanisms driving low-κ in these materials is essential for rational design. Here, we report a layer-differentiated phonon transport in Na2CoSe2O via solving the Wigner transport equation based on first-principles calculations, where CoSe6 and Na6O octahedra dominate acoustic and low-energy optical phonons, respectively, together inducing acoustic-optical bunching (a typical feature in homo-layered structures such as bilayer graphene and MoS2). In addition, Na6O generates high-energy flat optical phonons, in contrast to oxide-typical dispersive modes. This phonon dispersion feature, constrained by three-phonon scattering channels, necessitates interpretation via four-phonon processes, which simultaneously enhance wavelike coherent tunneling effects. Consequently, by considering anharmonic phonon renormalization, strong scattering of heat-carrying bunched phonons reduces κ by ~28%, with ~13% compensatory contribution from phonon coherence, yielding a low lattice thermal conductivity of 1.52 W m−1 K−1 at 300 K in Na2CoSe2O. This work provides new insights into the specific vibrational mechanisms, phonon bunching induced strong four-phonon scattering, highlights the critical role of distinct structural layers in governing thermal transport, and enriches the fundamental thermal transport mechanism in layered oxyselenides.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"42 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145919919","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

Anomalous superfluid density in pair-density-wave superconductors 对密度波超导体中的异常超流体密度

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-03 DOI: 10.1038/s41535-025-00843-7

Ke Wang, Qijin Chen, Rufus Boyack, K. Levin

引用次数: 0

Surveying optically addressable spin qubits for quantum information and sensing technology. 量子信息与传感技术中光学可寻址自旋量子位元的研究。

IF 6.6 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-01-01 Epub Date: 2026-04-05 DOI: 10.1038/s41535-026-00877-5

Calysta A Tesiman, Mark Oxborrow, Max Attwood

引用次数: 0

Interplay between altermagnetism and superconductivity in two dimensions: intertwined symmetries and singlet-triplet mixing 二维中电磁场和超导的相互作用：交织的对称性和单重态-三重态混合

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-12-30 DOI: 10.1038/s41535-025-00840-w

Kinga Jasiewicz, Paweł Wójcik, Michał P. Nowak, Michał Zegrodnik

{"title":"Interplay between altermagnetism and superconductivity in two dimensions: intertwined symmetries and singlet-triplet mixing","authors":"Kinga Jasiewicz, Paweł Wójcik, Michał P. Nowak, Michał Zegrodnik","doi":"10.1038/s41535-025-00840-w","DOIUrl":"https://doi.org/10.1038/s41535-025-00840-w","url":null,"abstract":"We study the interplay between altermagnetism and unconventional superconductivity for two-dimensional square- and triangular-lattice systems. Our approach is based on an effective single particle Hamiltonian which mimics the alternating spin splitting of the d-wave and i-wave altermagnetic state. By supplementing the model with intersite pairing term we characterize the principal features of the coexistent altermagnetic-superconducting state as well as the possibility of inducing the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. Our calculations show that the subtle interplay between the symmetries of the superconducting and altermagnetic order parameters as well as the shape/size of the Fermi surface lead to various types of anisotropic behaviors of the resultant non-zero momentum pairing, which has not been possible in the originally proposed FFLO state. Moreover, additional pairing symmetries appear leading to multi-component order parameter with singlet-triplet mixing. We discuss our result in the context of possible applications like, e.g., the superconducting diode.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"29 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894234","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