npj Quantum Materials最新文献_第2页

Ultrafast simultaneous manipulation of multiple ferroic orders through nonlinear phonon excitation

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-21 DOI: 10.1038/s41535-025-00738-7

Daniel A. Bustamante Lopez, Dominik M. Juraschek, Michael Fechner, Xianghan Xu, Sang-Wook Cheong, Wanzheng Hu

{"title":"Ultrafast simultaneous manipulation of multiple ferroic orders through nonlinear phonon excitation","authors":"Daniel A. Bustamante Lopez, Dominik M. Juraschek, Michael Fechner, Xianghan Xu, Sang-Wook Cheong, Wanzheng Hu","doi":"10.1038/s41535-025-00738-7","DOIUrl":"https://doi.org/10.1038/s41535-025-00738-7","url":null,"abstract":"Recent experimental studies have demonstrated the possibility of utilizing strong terahertz pulses to manipulate individual ferroic orders on pico- and femtosecond timescales. Here, we extend these findings and showcase the simultaneous manipulation of multiple ferroic orders in BiFeO3, a material that is both ferroelectric and antiferromagnetic at room temperature. We find a concurrent enhancement of ferroelectric and antiferromagnetic second-harmonic generation (SHG) following the resonant excitation of a high-frequency fully-symmetric phonon mode. Based on first-principles calculations and phenomenological modeling, we ascribe this observation to the inherent coupling of the two ferroic orders to the nonequilibrium distortions induced in the crystal lattice by nonlinearly driven phonons. Our finding highlights the potential of nonlinear phononics as a technique for manipulating multiple ferroic order parameters at once. In addition, this approach provides a promising avenue to studying the dynamical magnetic and polarization behavior, as well as their intrinsic coupling, on ultrashort timescales.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"50 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143470742","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

Magnetic memory and distinct spin populations in ferromagnetic Co3Sn2S2

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-19 DOI: 10.1038/s41535-025-00739-6

Charles Menil, Brigitte Leridon, Antonella Cavanna, Ulf Gennser, Dominique Mailly, Linchao Ding, Xiaokang Li, Zengwei Zhu, Benoît Fauqué, Kamran Behnia

引用次数: 0

Time-domain study of coupled collective excitations in quantum materials 量子材料中耦合集体激发的时域研究

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-14 DOI: 10.1038/s41535-025-00726-x

Chenhang Xu, Alfred Zong

{"title":"Time-domain study of coupled collective excitations in quantum materials","authors":"Chenhang Xu, Alfred Zong","doi":"10.1038/s41535-025-00726-x","DOIUrl":"https://doi.org/10.1038/s41535-025-00726-x","url":null,"abstract":"Quantum materials hold immense promises for future applications due to their intriguing electronic, magnetic, thermal, and mechanical properties that often arise from a complex interplay between microscopic degrees of freedom. Important insights of such interactions come from studying the collective excitations of electrons, spins, orbitals, and lattice, whose cooperative motions play a crucial role in determining the novel behavior of these systems and offer us a key tuning knob to modify material properties on-demand through external perturbations. In this regard, ultrafast light-matter interaction has shown great potential in controlling the couplings of collective excitations, and rapid progress in a plethora of time-resolved techniques down to the attosecond regime has significantly advanced our understanding of the coupling mechanisms and guided us in manipulating the dynamical properties of quantum materials. This review aims to highlight recent experiments on visualizing collective excitations in the time domain, focusing on the coupling mechanisms between different collective modes such as phonon-phonon, phonon-magnon, phonon-exciton, magnon-magnon, magnon-exciton, and various polaritons. We introduce how these collective modes are excited by an ultrashort laser pulse and probed by different ultrafast techniques, and we explain how the coupling between collective excitations governs the ensuing nonequilibrium dynamics. We also provide some perspectives on future studies that can lead to discoveries of the emergent properties of quantum materials both in and out of equilibrium.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"18 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417199","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

Fragmented superconductivity in the Hubbard model as solitons in Ginzburg–Landau theory

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-14 DOI: 10.1038/s41535-024-00718-3

Niccolò Baldelli, Hannes Karlsson, Benedikt Kloss, Matthew Fishman, Alexander Wietek

{"title":"Fragmented superconductivity in the Hubbard model as solitons in Ginzburg–Landau theory","authors":"Niccolò Baldelli, Hannes Karlsson, Benedikt Kloss, Matthew Fishman, Alexander Wietek","doi":"10.1038/s41535-024-00718-3","DOIUrl":"https://doi.org/10.1038/s41535-024-00718-3","url":null,"abstract":"The phenomena of superconductivity and charge density waves are observed in close vicinity in many strongly correlated materials. Increasing evidence from experiments and numerical simulations suggests both phenomena can also occur in an intertwined manner, where the superconducting order parameter is coupled to the electronic density. Employing density matrix renormalization group simulations, we investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary (t-{t}^{{prime} }-U) Hubbard model in the strong coupling regime. Remarkably, the condensate of Cooper pairs is shown to be fragmented in the presence of a charge density wave where more than one pairing wave function is macroscopically occupied. Moreover, we provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation in a periodic potential constituted by the charge density wave. In the presence of an orbital magnetic field, the order parameters are gauge invariant, and superconducting vortices are pinned between the stripes. This intertwined Ginzburg-Landau theory is proposed as an effective low-energy description of the stripe fragmented superconductor.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"50 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417196","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

Unprecedentedly large gap in HgBa2Ca2Cu3O8+δ with the highest Tc at ambient pressure

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-14 DOI: 10.1038/s41535-025-00735-w

Chuanhao Wen, Zhiyong Hou, Alireza Akbari, Kailun Chen, Wenshan Hong, Huan Yang, Ilya Eremin, Yuan Li, Hai-Hu Wen

{"title":"Unprecedentedly large gap in HgBa2Ca2Cu3O8+δ with the highest Tc at ambient pressure","authors":"Chuanhao Wen, Zhiyong Hou, Alireza Akbari, Kailun Chen, Wenshan Hong, Huan Yang, Ilya Eremin, Yuan Li, Hai-Hu Wen","doi":"10.1038/s41535-025-00735-w","DOIUrl":"https://doi.org/10.1038/s41535-025-00735-w","url":null,"abstract":"In cuprate superconductors, the highest Tc is possessed by the HgBa2Ca2Cu3O8+δ (Hg-1223) system at ambient pressure, but the reason remains elusive. Here we report the scanning tunneling measurements on the Hg-1223 single crystals with Tc ≈ 134 K. The observed gaps determined from the tunneling spectra (STS) can be categorized into two groups: the smaller gap Δ1 ranges from about 45–70 meV, while the larger gap Δ2 from about 65 to 98 meV. The STS was measured up to 200 K and the larger gap can persist well above Tc, indicating a pseudogap feature which may reflect the strong pairing energy in the inner layer. Interestingly, an extremely strong particle-hole asymmetry is observed in associating with a very robust coherence-like peak at the bias of the larger gap in the hole branch of the Bogoliubov dispersion. We argue that the observed asymmetry results may be from the interplay of a flat band (van Hove singularity) in the electronic spectrum and the larger gap in the underdoped (inner) layer. A theoretical approach based on a trilayer model with an interlayer coupling can give a reasonable explanation. Our results provide deep insight into understanding the mechanism of superconductivity in cuprate superconductors.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"35 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417198","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

Spin-orbit control of antiferromagnetic domains without a Zeeman coupling

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-11 DOI: 10.1038/s41535-025-00736-9

D. T. Maimone, J. Shen, N. Gauthier, D. G. Mazzone, M. Zolliker, R. Yadav, R. Sibille, D. J. Gawryluk, E. Pomjakushina, S. Raymond, E. Ressouche, C. Niedermayer, G. Lapertot, J. L. Gavilano, M. Bartkowiak, M. Kenzelmann

{"title":"Spin-orbit control of antiferromagnetic domains without a Zeeman coupling","authors":"D. T. Maimone, J. Shen, N. Gauthier, D. G. Mazzone, M. Zolliker, R. Yadav, R. Sibille, D. J. Gawryluk, E. Pomjakushina, S. Raymond, E. Ressouche, C. Niedermayer, G. Lapertot, J. L. Gavilano, M. Bartkowiak, M. Kenzelmann","doi":"10.1038/s41535-025-00736-9","DOIUrl":"https://doi.org/10.1038/s41535-025-00736-9","url":null,"abstract":"Encoding information in antiferromagnetic (AFM) domains is a promising solution for the ever growing demand in magnetic storage capacity. The absence of a macroscopic magnetization avoids crosstalk between different domain states, enabling ultrahigh density spintronics1 while being detrimental to the domain detection and manipulation. Disentangling these merits and disadvantages seemed so far unattainable. We report evidence for a new AFM domain selection mechanism based on non-Zeeman susceptibility anisotropy induced by the relative orientation of external magnetic fields to the k-domains. Consequently, the charge transport response is controlled by the rotation of the magnetic field and a pronounced anisotropic magnetoresistance is found in the AFM phase of bulk materials Nd1−xCex CoIn5. Our results and the domain switching theory2 indicate that this constitutes a new effect which might be universal across multiband materials. It provides a novel mechanism to control and detect AFM domains opening new perspectives for AFM sprintronics.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"16 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393009","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

Spin density wave in the bilayered nickelate La3Ni2O7−δ at ambient pressure

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-10 DOI: 10.1038/s41535-025-00740-z

Xiao-Sheng Ni, Yuyang Ji, Lixin He, Tao Xie, Dao-Xin Yao, Meng Wang, Kun Cao

{"title":"Spin density wave in the bilayered nickelate La3Ni2O7−δ at ambient pressure","authors":"Xiao-Sheng Ni, Yuyang Ji, Lixin He, Tao Xie, Dao-Xin Yao, Meng Wang, Kun Cao","doi":"10.1038/s41535-025-00740-z","DOIUrl":"https://doi.org/10.1038/s41535-025-00740-z","url":null,"abstract":"The recent discovery of high-temperature superconductivity in high-pressurized La3Ni2O7−δ has garnered significant attention. Using density functional theory, we investigate the magnetic properties of La3Ni2O7−δ at ambient pressure. Our calculations suggest that with δ = 0, the double spin stripe phase is favored as the magnetic ground state. Oxygen vacancies may effectively turn nearest Ni spins into charge sites. Consequently, with moderate δ values, our theoretical magnetic ground state exhibits characteristics of both double spin stripe and spin-charge stripe configurations, providing a natural explanation to reconcile the seemingly contradictory experimental findings that suggest both the configurations as candidates for the spin-density-wave phase. With higher δ values, we anticipate the ground state to become a spin-glass-like noncollinear magnetic phase with only short-range order. The oxygen vacancies are expected to significantly impact the magnetic excitations and the transition temperatures TSDW. Notably, the magnetic ordering also induces concomitant charge ordering and orbital ordering, driven by spin-lattice coupling under the low symmetry magnetic order. We further offer a plausible explanation for the experimental observations that the measured TSDW appears insensitive to the variation of samples and the lack of direct evidence for long-range magnetic ordering.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"8 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375503","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

Multidimensional terahertz probes of quantum materials

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-10 DOI: 10.1038/s41535-025-00741-y

Albert Liu

引用次数: 0

Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-09 DOI: 10.1038/s41535-025-00742-x

Shaofeng Duan, Binshuo Zhang, Zihao Wang, Shichong Wang, Lingxiao Gu, Haoran Liu, Jiongyu Huang, Jianzhe Liu, Dong Qian, Yanfeng Guo, Wentao Zhang

{"title":"Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES","authors":"Shaofeng Duan, Binshuo Zhang, Zihao Wang, Shichong Wang, Lingxiao Gu, Haoran Liu, Jiongyu Huang, Jianzhe Liu, Dong Qian, Yanfeng Guo, Wentao Zhang","doi":"10.1038/s41535-025-00742-x","DOIUrl":"https://doi.org/10.1038/s41535-025-00742-x","url":null,"abstract":"The interplay between different degrees of freedom governs the emergence of correlated electronic states in quantum materials, with charge density waves (CDW) often coexisting with other exotic phases. Under thermal equilibrium, traditional CDW states are consequentially accompanied by structural phase transitions. In contrast, ultrafast photoexcitation allows access to exotic states where a single degree of freedom dominates in the time domain, enabling the study of underlying physics without interference. Here, we report the realization of a long-lived metastable CDW state without lattice distortion at the photoinduced interfaces in GdTe3 using time- and angle-resolved photoemission spectroscopy. After optical excitation above the CDW melting threshold, we identified emerged metastable interfaces through inverting the CDW-coupled lattice distortions, with lifetimes on the order of 10 picoseconds. These photoinduced interfaces represent a novel CDW state lacking the usual amplitude mode and lattice distortions, allowing quantification of the dominant role of electronic instabilities in CDW order. This work provides a new approach to disentangling electronic instabilities from electron-phonon coupling using a nonequilibrium method.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"84 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371679","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

Using magnetic dynamics to measure the spin gap in a candidate Kitaev material

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2025-02-01 DOI: 10.1038/s41535-025-00737-8

Xinyi Jiang, Qingzheng Qiu, Cheng Peng, Hoyoung Jang, Wenjie Chen, Xianghong Jin, Li Yue, Byungjune Lee, Sang-Youn Park, Minseok Kim, Hyeong-Do Kim, Xinqiang Cai, Qizhi Li, Tao Dong, Nanlin Wang, Joshua J. Turner, Yuan Li, Yao Wang, Yingying Peng

{"title":"Using magnetic dynamics to measure the spin gap in a candidate Kitaev material","authors":"Xinyi Jiang, Qingzheng Qiu, Cheng Peng, Hoyoung Jang, Wenjie Chen, Xianghong Jin, Li Yue, Byungjune Lee, Sang-Youn Park, Minseok Kim, Hyeong-Do Kim, Xinqiang Cai, Qizhi Li, Tao Dong, Nanlin Wang, Joshua J. Turner, Yuan Li, Yao Wang, Yingying Peng","doi":"10.1038/s41535-025-00737-8","DOIUrl":"https://doi.org/10.1038/s41535-025-00737-8","url":null,"abstract":"Spin-orbit entangled materials have attracted widespread interest due to the novel magnetic phenomena arising from the interplay between spin-orbit coupling and electronic correlations. However, the intricate nature of spin interactions within Kiteav materials complicates the precise measurement of low-energy spin excitations. Using Na2Co2TeO6 as an example, we study these low-energy spin excitations using the time-resolved resonant elastic x-ray scattering (tr-REXS). Our observations unveil remarkably slow spin dynamics at the magnetic peak, whose recovery timescale is several nanoseconds. This timescale aligns with the extrapolated spin gap of ~1 μeV, obtained by density matrix renormalization group (DMRG) simulations in the thermodynamic limit. The consistency demonstrates the efficacy of tr-REXS in discerning low-energy spin gaps inaccessible to conventional spectroscopic techniques.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"1 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072384","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