npj Quantum Materials最新文献_第3页

Hybrid metal-semiconductor quantum dots in InAs as a platform for quantum simulation 金属半导体混合量子点在InAs中作为量子模拟的平台

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-27 DOI: 10.1038/s41535-026-00929-w

Praveen Sriram, Connie L. Hsueh, Karna A. Morey, Tiantian Wang, Candice Thomas, Geoffrey C. Gardner, Marc A. Kastner, Michael J. Manfra, Andrew K. Mitchell, Eran Sela, David Goldhaber-Gordon

{"title":"Hybrid metal-semiconductor quantum dots in InAs as a platform for quantum simulation","authors":"Praveen Sriram, Connie L. Hsueh, Karna A. Morey, Tiantian Wang, Candice Thomas, Geoffrey C. Gardner, Marc A. Kastner, Michael J. Manfra, Andrew K. Mitchell, Eran Sela, David Goldhaber-Gordon","doi":"10.1038/s41535-026-00929-w","DOIUrl":"https://doi.org/10.1038/s41535-026-00929-w","url":null,"abstract":"Arrays of hybrid metal-semiconductor quantum dots offer a new approach to quantum simulation, with key advantages over arrays of conventional quantum dots. Because the metallic component of these hybrid dots has a quasi-continuous level spectrum, each site in an array can be effectively electronically identical; in contrast, each conventional semiconductor quantum dot has its own spectral fingerprint. Meanwhile, the semiconductor component retains gate-tunability of intersite coupling. This combination creates a scalable platform for simulating correlated ground states driven by Coulomb interactions. We report the fabrication and characterization of hybrid metal-semiconductor dots, featuring a submicron metal island transparently contacting a gate-confined region of an InAs quantum well with tunable couplings to macroscopic leads. Tuning the dot-lead coupling to the weak-coupling limit yields highly-uniform Coulomb peaks, with no resolvable excitation spectrum in the Coulomb diamonds. We propose a realistic device design for a hybrid dot-based linear array quantum simulator and outline the correlated many-body physics accessible in this architecture.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"86 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148612782","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

Anyon polarons as a window into the competing phases of the Kitaev-Gamma-Gamma-prime model 任意极化子作为基塔耶夫- γ - γ -撇模型的竞争相的窗口

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-25 DOI: 10.1038/s41535-026-00927-y

Chuan Chen, Inti Sodemann Villadiego

{"title":"Anyon polarons as a window into the competing phases of the Kitaev-Gamma-Gamma-prime model","authors":"Chuan Chen, Inti Sodemann Villadiego","doi":"10.1038/s41535-026-00927-y","DOIUrl":"https://doi.org/10.1038/s41535-026-00927-y","url":null,"abstract":"We investigate the dispersions of anyon quasiparticles in the Kitaev honeycomb spin liquid perturbed by Γ and Γ′{Gamma }^{{prime} } couplings in order to understand phase transitions into competing states through anyon gap-closing instabilities. We demonstrate how anyon gap closings provide a way to understand phase transitions into a plethora of previously identified competing phases—including zigzag, stripy, 120°, and incommensurate spiral phases—and are in agreement with numerical studies not only on the nature of the phases, but also on the specific critical values of Γ and Γ′{Gamma }^{{prime} } couplings. Remarkably, when the antiferromagnetic Kitaev model is perturbed by a negative Γ interaction, we find that the single-vison and fermion gaps remain open while the gap of a magnon-like local boson vanishes. This points to a plausible candidate coexistence regime where long-range magnetic order emerges while fractionalized excitations inherited from the Kitaev spin liquid may persist. The magnetic order can be either stripy antiferromagnetic or incommensurate spiral, depending on the sign of Γ′{Gamma }^{{prime} }.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"17 4 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148587301","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

Observation of a commensurate super modulation consistent with an intertwined charge density wave and antiferromagnetic phase in monolayer 1T-NbSe2 单层1T-NbSe2中电荷密度波与反铁磁相交织的相应超调制的观察

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-17 DOI: 10.1038/s41535-026-00924-1

Joy Y. Hsu, Rachel Birchmier, Gurjyot Sethi, Michael A. Altvater, Guannan Chen, Steven G. Louie, Vidya Madhavan

引用次数: 0

Gate-tunable polarity inversions and three-fold rotation symmetry of the superconducting diode effect 超导二极管效应的栅极可调谐极性反转和三重旋转对称

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-16 DOI: 10.1038/s41535-026-00923-2

William F. Schiela, Melissa Mikalsen, Daniel Crawford, Stefan Ilić, William M. Strickland, F. Sebastian Bergeret, Javad Shabani

引用次数: 0

Mirror-selective quasiparticle interference in bilayer nickelate superconductor 双层镍酸盐超导体中的镜像选择性准粒子干涉

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-14 DOI: 10.1038/s41535-026-00913-4

Zhongyi Zhang, Jun Zhan, Congcong Le, Hoi Chun Po, Jiangping Hu, Xianxin Wu

引用次数: 0

Fermi surface topology of the topological nodal-loop semimetal HfP2 拓扑节点环半金属HfP2的费米表面拓扑

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-11 DOI: 10.1038/s41535-026-00926-z

Yong Zhang, Yonglong Xue, Sutao Sun, Hao Ren, Gang Li, Jia-Qiang Cai, Ming-Hui Gao, Peixin Ma, Yang-Yang Lv, Chuan-Ying Xi, Jing Lei Zhang, Shu-Hua Yao, Jian Zhou, Yan Bin Chen, Yan-Feng Chen

引用次数: 0

Direct evidence of light-induced phase-fluctuations in cuprates via time-resolved ARPES 光诱导铜酸盐相位波动的直接证据，通过时间分辨ARPES

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-10 DOI: 10.1038/s41535-026-00919-y

D. Armanno, F. Goto, J.-M. Parent, S. Lapointe, A. Longa, R. D. Zhong, J. Schneeloch, G. D. Gu, G. Jargot, H. Ibrahim, F. Légaré, B. J. Siwick, N. Gauthier, F. Boschini

{"title":"Direct evidence of light-induced phase-fluctuations in cuprates via time-resolved ARPES","authors":"D. Armanno, F. Goto, J.-M. Parent, S. Lapointe, A. Longa, R. D. Zhong, J. Schneeloch, G. D. Gu, G. Jargot, H. Ibrahim, F. Légaré, B. J. Siwick, N. Gauthier, F. Boschini","doi":"10.1038/s41535-026-00919-y","DOIUrl":"https://doi.org/10.1038/s41535-026-00919-y","url":null,"abstract":"Light perturbation of the superconducting phase of cuprates typically promotes a non-thermal, superconducting-to-normal state phase transition. Although phase fluctuations are widely accepted as playing a primary role in disrupting long-range superconducting order, an experimental probe capable of unambiguously assessing their effect with momentum and time resolutions is still lacking. Here, by combining high-resolution time-resolved and temperature-dependent angle-resolved photoemission studies of optimally-doped Bi 2 Sr 2 CaCu 2 O 8+ δ , we demonstrate a new experimental strategy to directly probe light-induced changes in the order parameter’s phase with momentum resolution. To do so, we track the ultrafast response of a phase-sensitive hybridization gap that appears at the crossing between two bands with opposite superconducting gap signs. Supported by theoretical modeling, we establish phase fluctuations as the dominant factor defining the non-thermal response of the superconducting phase in cuprates, further corroborating the view that the density of phase fluctuations is enhanced by non-electronic, low-energy excitations.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"13 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148432150","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

Understanding anomalous magnetothermal transport via disentangling shear and compression phonons 通过解纠缠剪切和压缩声子来理解异常磁热输运

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-09 DOI: 10.1038/s41535-026-00922-3

Haoting Xu, Antoine Matar, Hae-Young Kee

引用次数: 0

Electrically controlled 0-π oscillations and antiferromagnetic Josephson spin valve with PT symmetry 具有PT对称的电控0-π振荡和反铁磁约瑟夫森自旋阀

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-09 DOI: 10.1038/s41535-026-00920-5

Jin-Xin Hu, Mengli Hu, Ying-Ming Xie, K. T. Law

引用次数: 0

Dynamics and lifetime of geometric excitations in moiré systems 振动系统中几何激励的动力学和寿命

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-07-07 DOI: 10.1038/s41535-026-00914-3

Yuzhu Wang, Joe Huxford, Dung Xuan Nguyen, Guangyue Ji, Yong Baek Kim, Bo Yang

{"title":"Dynamics and lifetime of geometric excitations in moiré systems","authors":"Yuzhu Wang, Joe Huxford, Dung Xuan Nguyen, Guangyue Ji, Yong Baek Kim, Bo Yang","doi":"10.1038/s41535-026-00914-3","DOIUrl":"https://doi.org/10.1038/s41535-026-00914-3","url":null,"abstract":"Recently observed spin-2 collective excitations, known as chiral graviton modes, encode noncommutative geometry and topological information in fractional quantum Hall systems. An outstanding question is whether such chiral geometric excitations remain well-defined in moiré Chern bands hosting fractional Chern insulator phases, where continuous rotational symmetry is explicitly broken. Combining extensive numerical simulations with analytical tools, we demonstrate that graviton modes with well-defined chirality can persist in moiré Chern bands. Remarkably, their existence is enabled by an emergent restoration of full rotational symmetry in the many-body ground state. This establishes fractional Chern insulators as a promising platform for probing geometric collective modes beyond Landau levels. We further uncover an important subtlety: in generic Chern bands, the lack of continuous rotational symmetry for gapped excitations enhances scattering and suppresses graviton lifetimes in the thermodynamic limit. Nonetheless, we propose tuning strategies that stabilize graviton modes by lowering their energies below the excitation continuum. Our results reveal novel phenomena unique to Chern bands and provide a concrete roadmap for experimentally accessing geometric collective excitations in moiré materials.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"37 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148409199","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