npj Quantum Materials最新文献

Surface phonon Hall viscosity induced phonon chirality and nonreciprocity in magnetic topological insulator films 磁性拓扑绝缘体薄膜中表面声子霍尔粘度诱导声子手性和非互易性

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-05 DOI: 10.1038/s41535-026-00940-1

Abhinava Chatterjee,Chao-Xing Liu

引用次数: 0

RIXS observation of bond-directional excitations in the Kitaev material Na2IrO3 Kitaev材料Na2IrO3中键定向激发的RIXS观测

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-03 DOI: 10.1038/s41535-026-00938-9

Marco Magnaterra,Karolin Hopfer,Christoph J. Sahle,Marco Moretti Sala,Giulio Monaco,Jan Attig,Ciarán Hickey,Ina-Marie Pietsch,Franziska Breitner,Philipp Gegenwart,Mary H. Upton,Jungho Kim,Simon Trebst,Paul H. M. van Loosdrecht,Jeroen van den Brink,Markus Grüninger

{"title":"RIXS observation of bond-directional excitations in the Kitaev material Na2IrO3","authors":"Marco Magnaterra,Karolin Hopfer,Christoph J. Sahle,Marco Moretti Sala,Giulio Monaco,Jan Attig,Ciarán Hickey,Ina-Marie Pietsch,Franziska Breitner,Philipp Gegenwart,Mary H. Upton,Jungho Kim,Simon Trebst,Paul H. M. van Loosdrecht,Jeroen van den Brink,Markus Grüninger","doi":"10.1038/s41535-026-00938-9","DOIUrl":"https://doi.org/10.1038/s41535-026-00938-9","url":null,"abstract":"Abstract Spin-orbit coupling locks spin direction and spatial orientation and generates, in semi-classical magnets, a local spin easy-axis and associated ordering. Quantum spin-1/2’s defy this fate: rather than spins becoming locally anisotropic, the spin-spin interactions do. Consequently interactions become dependent on the spatial orientation of bonds between spins, prime theoretical examples of which are Kitaev magnets. Bond-directional interactions imply the existence of bond-directional magnetic modes, spin excitations that render crystallographically equivalent bonds magnetically inequivalent, which yet have remained elusive experimentally. Here we show that resonant inelastic X-ray scattering allows us to explicitly probe the bond-directional character of magnetic excitations. To do so, we use a scattering plane spanned by one bond and the corresponding spin component and scan a range of momentum transfer that encompasses multiple Brillouin zones. Applying this approach to Na 2 IrO 3 we establish the different bond-directional characters of magnetic excitations at ~10 meV and ~45 meV. The bond-directional nearest-neighbor excitations are a fingerprint of the dominant Kitaev interactions and even prevail in the magnetically ordered state.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"11 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894057","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

Two-dimensional coherent spectroscopy of CoNb2O6 CoNb2O6的二维相干光谱

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-08-20 DOI: 10.1038/s41535-026-00936-x

Yoshito Watanabe, Simon Trebst, Ciarán Hickey

{"title":"Two-dimensional coherent spectroscopy of CoNb2O6","authors":"Yoshito Watanabe, Simon Trebst, Ciarán Hickey","doi":"10.1038/s41535-026-00936-x","DOIUrl":"https://doi.org/10.1038/s41535-026-00936-x","url":null,"abstract":"With recent advances in terahertz (THz) sources and detection, two-dimensional coherent spectroscopy (2DCS), which allows one to probe nonlinear responses, now reaches the meV regime relevant for quasiparticle excitations in magnetic materials. This opens a promising route to reveal many-body phenomena that evade linear-response probes. To date, most experimental applications have focused on classical magnets, and a solid demonstration in a quantum magnet has yet to be established. Here we present a theoretical study of 2DCS in CoNb2O6, a quasi-one-dimensional Ising magnet that is believed to host fractionalized spinons which at low temperatures are confined by weak interchain coupling. Our analysis, which builds on an experimentally constrained effective S = 1/2 Hamiltonian, is found to reveal unambiguous 2DCS signatures of spinon deconfinement above the low-temperature ordered phase. Using a four-spinon approximation, we track these 2DCS signatures by sequentially building a faithful microscopic model for CoNb2O6, starting from the exactly solvable one-dimensional transverse-field Ising model (1d TFIM) and successively adding additional interactions. In particular, adding a bond-dependent staggered YZ interaction to the 1d-TFIM already reproduces many key spectral features of the full material Hamiltonian. Within this TFIM+YZ model, we find a series of bound states, including a four-spinon bound state that is distinct from the familiar two-spinon bound states. We further find that introducing a confinement potential suppresses sharp spinon-echo features, which are thought to reflect an underlying continuum of fractionalized excitations. Our results provide concrete predictions for future THz 2DCS experiments on CoNb2O6 and related quasi-one-dimensional quantum magnets.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"19 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769280","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

Anisotropic Kitaev spin glass in Li2RuxIr1−xO3 Li2RuxIr1−xO3的各向异性Kitaev自旋玻璃

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-08-19 DOI: 10.1038/s41535-026-00935-y

Mayia A. Vranas, Alejandro Ruiz, Vikram Nagarajan, Erik S. Lamb, Gerald D. Morris, Zahir Islam, Christie Nelson, Nobumichi Tamura, Benjamin A. Frandsen, James G. Analytis, Alex Frano

{"title":"Anisotropic Kitaev spin glass in Li2RuxIr1−xO3","authors":"Mayia A. Vranas, Alejandro Ruiz, Vikram Nagarajan, Erik S. Lamb, Gerald D. Morris, Zahir Islam, Christie Nelson, Nobumichi Tamura, Benjamin A. Frandsen, James G. Analytis, Alex Frano","doi":"10.1038/s41535-026-00935-y","DOIUrl":"https://doi.org/10.1038/s41535-026-00935-y","url":null,"abstract":"Kitaev iridates are an important class of spin-orbit-entangled quantum materials, where bond-directional exchange generates strong magnetic frustration and unconventional correlated states. The α, β, γ − Li2IrO3 family exhibit fragile and highly anisotropic magnetic behavior, including incommensurate counter-rotating order, strong field sensitivity, and pressure-driven electronic reconstruction. Understanding how chemical substitution perturbs these competing interactions provides a route toward probing the underlying frustrated magnetic state. Here, we study single crystals of β − Li2RuxIr1−xO3 with dilute Ru substitution, x ≲ 10%. Through magnetometry, resonant elastic X-ray scattering, ac-heat capacity, and muon spin relaxation/rotation, we show that weak magnetic disorder suppresses the incommensurate antiferromagnetic ground state. Instead, the system evolves into a bulk spin glass characterized by slow relaxation and frozen, local magnetic fields. Despite the loss of long-range order, the glassy state retains substantial directional anisotropy, evidenced by enhanced b-axis magnetic susceptibility and direction-dependent thermoremanent relaxation. Structural probes further indicate that Ru substitution leaves the hyperhoneycomb lattice largely undistorted while disrupting magnetic coherence, suggesting that disorder freezes spins within a still-active bond-directional exchange environment. In this picture, dilute Ru substitution provides a controlled pathway into an anisotropic Kitaev spin glass regime that preserves essential fingerprints of the underlying Kitaev exchange network.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"1 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769282","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

Superconductivity from doping symmetric mass generation insulators: application to La3Ni2O7 under pressure 掺杂对称质量生成绝缘子的超导性：在压力下La3Ni2O7上的应用

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-08-17 DOI: 10.1038/s41535-026-00925-0

Da-Chuan Lu, Miao Li, Zhao-Yi Zeng, Wanda Hou, Juven Wang, Fan Yang, Yi-Zhuang You

{"title":"Superconductivity from doping symmetric mass generation insulators: application to La3Ni2O7 under pressure","authors":"Da-Chuan Lu, Miao Li, Zhao-Yi Zeng, Wanda Hou, Juven Wang, Fan Yang, Yi-Zhuang You","doi":"10.1038/s41535-026-00925-0","DOIUrl":"https://doi.org/10.1038/s41535-026-00925-0","url":null,"abstract":"We investigate the bilayer nickelates as a platform to realize the symmetric mass generation (SMG) insulator, a featureless Mott insulator that arises due to the Lieb-Schultz-Mattis (LSM) anomaly cancellation in bilayer spin-1/2 lattice systems. Through a single-orbital bilayer square lattice model involving intralayer hopping t and interlayer superexchange interaction J, we demonstrate the emergence of high-temperature superconductivity (SC) upon doping the SMG insulator. The SC phase features s-wave interlayer spin-singlet pairing and exhibits a crossover between the Bardeen-Cooper-Schrieffer (BCS) and Bose-Einstein condensation (BEC) limits by tuning the J/t ratio. We estimate the SC transition temperature Tc from both the weak and strong coupling limits at the mean-field level. Our findings offer insights into the experimentally observed decrease in Tc with pressure and the strange metal behavior above Tc. Additionally, we propose that both Ni (3{d}_{{z}^{2}}) and (3{d}_{{x}^{2}-{y}^{2}}) orbitals can exhibit superconductivity in La3Ni2O7 under pressure, but their Tc should vary in opposite ways under doping. This characteristic difference suggests a potential experimental pathway to identify which electronic orbital plays the principal role in the formation of superconductivity in this system.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"35 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769284","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

Strain-control of electronic superlattice domains in CsV3Sb5 CsV3Sb5中电子超晶格域的应变控制

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-08-08 DOI: 10.1038/s41535-026-00933-0

E. Sadrollahi, J. Almeida Mendes, N. Stilkerich, A. K. Sharma, C. Shekhar, C. Felser, T. Ritschel, J. Geck

{"title":"Strain-control of electronic superlattice domains in CsV3Sb5","authors":"E. Sadrollahi, J. Almeida Mendes, N. Stilkerich, A. K. Sharma, C. Shekhar, C. Felser, T. Ritschel, J. Geck","doi":"10.1038/s41535-026-00933-0","DOIUrl":"https://doi.org/10.1038/s41535-026-00933-0","url":null,"abstract":"The kagome metals <italic>A</italic>V3Sb5 (A = K, Rb, Cs) provide a unique platform to investigate the physics of interacting electrons, a central challenge in condensed matter physics. A key obstacle in unraveling their correlated behavior is to determine which structural and electronic degrees of freedom are involved and how they couple. Here, we address this important issue with a novel approach, namely by exploring the strain dependence of electronic superlattices (SL) in CsV3Sb5. Using high-resolution x-ray diffraction, we track the detwinning of the 2 × 2 × 4 electronic crystal and uncover a gigantic strain response of its domains. We further show that the detwinned 2 × 2 × 4 phase exhibits an intrinsic double-<bold>q</bold> modulation and strong mode coupling. Density functional theory reveals that the structural 2 × 2 × 4 modulation couples strongly to the V 3<italic>d</italic>-orbitals, naturally explaining its pronounced strain response. In contrast, the 2 × 2 × 2 phase at lower temperatures remains essentially unaffected by small uniaxial strain. This dichotomy points to fundamental differences in the symmetry breaking and stabilization mechanisms of the two electronic orders. More specifically, our results provide evidence for the active role of orbital degrees of freedom, which can realize distinct, complex ordering patterns driven by competing interactions.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"26 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148687958","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

Revealing the microscopic origin of the magnetization plateau in Na3Ni2BiO6 揭示了Na3Ni2BiO6磁化平台的微观成因

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-08-08 DOI: 10.1038/s41535-026-00932-1

Amanda A. Konieczna, Marius Möller, P. Peter Stavropoulos, Roser Valentí

{"title":"Revealing the microscopic origin of the magnetization plateau in Na3Ni2BiO6","authors":"Amanda A. Konieczna, Marius Möller, P. Peter Stavropoulos, Roser Valentí","doi":"10.1038/s41535-026-00932-1","DOIUrl":"https://doi.org/10.1038/s41535-026-00932-1","url":null,"abstract":"Recent experimental studies of the spin-1 honeycomb antiferromagnet Na3Ni2BiO6 have revealed a pronounced one-third magnetization plateau under applied magnetic fields, highlighting the presence of strong magnetic frustration and anisotropy in this material. Such behavior has been attributed to substantial bond-dependent Kitaev interactions in combination with single-ion anisotropy, placing Na3Ni2BiO6 among honeycomb compounds of interest for unconventional magnetic phases. Motivated by these observations, we present a first-principles-based analysis of the magnetic interactions in Na3Ni2BiO6. By combining density-functional calculations with microscopic modeling, we extract the relevant exchange parameters and construct an effective spin model that qualitatively reproduces both the elastic neutron-scattering spectra and the magnetization curve. The model captures the experimentally observed zero-field zigzag magnetic order, and proposes a <italic>double-zigzag</italic> state at intermediate magnetic fields, realizing the one-third magnetization plateau in a simpler way than suggested in previous works. Crucially, we show that the one-third magnetization plateau does not require Kitaev interactions; instead, it arises from the interplay of strong out-of-plane single-ion anisotropy and competing ferromagnetic nearest-neighbor (<italic>J</italic>1) and antiferromagnetic third-neighbor (<italic>J</italic>3) Heisenberg couplings. These results establish a consistent microscopic description of Na3Ni2BiO6 and clarify the origin of its field-induced plateau phase from first principles.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"10 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148687996","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

Gate-dielectric stack engineering for high-mobility and low-noise SiMOS quantum devices 高迁移率和低噪声SiMOS量子器件的门-介电堆栈工程

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-08-06 DOI: 10.1038/s41535-026-00934-z

Md. Mamunur Rahman, Ensar Vahapoglu, Kok Wai Chan, Tuomo Tanttu, Ajit Dash, Jonathan Yue Huang, Steve Yianni, Venkatesh Chenniappan, Jesús D. Cifuentes, Fay E. Hudson, Christopher C. Escott, Yik Kheng Lee, Nard Dumoulin Stuyck, Arne Laucht, Andrea Morello, Andre Saraiva, Jared H. Cole, Andrew S. Dzurak, Wee Han Lim

{"title":"Gate-dielectric stack engineering for high-mobility and low-noise SiMOS quantum devices","authors":"Md. Mamunur Rahman, Ensar Vahapoglu, Kok Wai Chan, Tuomo Tanttu, Ajit Dash, Jonathan Yue Huang, Steve Yianni, Venkatesh Chenniappan, Jesús D. Cifuentes, Fay E. Hudson, Christopher C. Escott, Yik Kheng Lee, Nard Dumoulin Stuyck, Arne Laucht, Andrea Morello, Andre Saraiva, Jared H. Cole, Andrew S. Dzurak, Wee Han Lim","doi":"10.1038/s41535-026-00934-z","DOIUrl":"https://doi.org/10.1038/s41535-026-00934-z","url":null,"abstract":"We systematically investigate the interplay between materials engineering, quantum transport, and low-frequency charge noise in silicon metal-oxide-semiconductor (SiMOS) quantum devices. By combining Hall-bar transport measurements with charge-noise spectroscopy of gate-defined quantum dots, we identify correlations between gate-stack design, carrier mobility, and electrostatic noise, providing an experimental case study of material and process dependencies relevant to low-noise, high-mobility operation. Hall-bar studies show that varying the oxidant (H2O or D2O) during ALD Al2O3 growth has very little influence on mobility, whereas increasing the Al2O3 deposition temperature from 200 °C to 300 °C yields a modest improvement. Devices incorporating HfO2 exhibit enhanced carrier mobility, possibly due to defect passivation associated with aluminum diffusion into the dielectric from the gate metal. In contrast, gate-metal selection strongly influences transport properties, with TiPd-gated devices exhibiting substantially lower mobility than their Al-gated counterparts. Charge-noise measurements further reveal a clear correlation between mobility and noise performance, with lower-mobility devices generally exhibiting higher charge noise, while the poly-Si-gated CMOS-foundry device achieves the lowest noise level. Finally, dual-feedback dot-sensor stability mapping demonstrates enhanced charge stability in devices with the gate stacks studied here, underscoring their promise for scalable, high-fidelity silicon spin-qubit platforms.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"9 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148693514","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

Robust field-free superconducting diode effect in FeTe0.55Se0.45 FeTe0.55Se0.45中鲁棒无场超导二极管效应

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-08-02 DOI: 10.1038/s41535-026-00930-3

Peng Dong, Jinghui Wang, Yanjiang Wang, Jianjun Xiao, Xiang Zhou, Hui Xing, Kenji Watanabe, Takashi Taniguchi, Yueshen Wu, Yulin Chen, Jinsheng Wen, Jun Li

{"title":"Robust field-free superconducting diode effect in FeTe0.55Se0.45","authors":"Peng Dong, Jinghui Wang, Yanjiang Wang, Jianjun Xiao, Xiang Zhou, Hui Xing, Kenji Watanabe, Takashi Taniguchi, Yueshen Wu, Yulin Chen, Jinsheng Wen, Jun Li","doi":"10.1038/s41535-026-00930-3","DOIUrl":"https://doi.org/10.1038/s41535-026-00930-3","url":null,"abstract":"The superconducting diode effect (SDE), a nonreciprocal phenomenon where the critical supercurrent differs depending on the direction of current flow, is a promising foundation for superconducting logic and memory. Realizing its full potential requires a diode that operates without an applied magnetic field, which generally requires the breaking of both time-reversal and inversion symmetries in the superconducting system. Zero-field SDEs are often observed in heterostructures but remain rare in single materials. Here, we report the observation of a robust, field-free SDE in thin flakes of FeTe0.55Se0.45. A sensitive probe of nonreciprocal transport is the emergence of a pronounced second harmonic response near the superconducting transition under zero applied field, with an amplitude comparable to the standard first harmonic signal. The SDE persists at zero field and maintains its polarity under both large positive and negative magnetic fields, exhibiting an even-in-field symmetry that distinguishes it from mechanisms based on finite-momentum pairing or magnetochiral anisotropy. We systematically rule out alternative origins, including device geometry, thermal gradients, chiral domains, and extrinsic magnetic order. Instead, our analysis indicates that local strain/polarization-induced symmetry breaking is a primary factor in generating and enhancing the effect. These results identify iron-based high-temperature superconducting platforms as highly promising candidates for the field-free superconducting diode effect, benefiting from their coexistence of strong intrinsic disorder and superconductivity in a structurally simple form.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"360 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148693429","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

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