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| Open AccessFlower-shaped 2D crystals grown in curved fluid vesicle membranes
Thin crystals grown on rigid spherical templates of increasing curvature exhibit increased protrusions. Here, the authors demonstrate the opposite curvature effect on the morphology of molecularly thin crystals grown within elastic fluid membranes, like those of biological cells.
- Hao Wan
- , Geunwoong Jeon
- & Maria M. Santore
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Article
| Open AccessQuantum critical phase of FeO spans conditions of Earth’s lower mantle
Large-scale eDMFT computation reveals that FeO undergoes a gradual orbitally selective insulator-metal transition across the extreme conditions of Earth’s interior, with implications for compositions and conductivity of the core-mantle boundary region.
- Wai-Ga D. Ho
- , Peng Zhang
- & Vasilije V. Dobrosavljevic
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| Open AccessCorrelation between two distant quasiparticles in separate superconducting islands mediated by a single spin
The authors experimentally study a chain of superconducting islands (SI) and quantum dots (QD), where a Bogoliubov quasiparticle occupies each SI. They demonstrate correlations between the quasiparticles in each SI mediated by a single spin on the QD, known as an “over-screened" doublet state of the QD.
- Juan Carlos Estrada Saldaña
- , Alexandros Vekris
- & Jesper Nygård
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Article
| Open AccessRoom-temperature stabilizing strongly competing ferrielectric and antiferroelectric phases in PbZrO3 by strain-mediated phase separation
There is a desire to know how the threefold ferrielectric coexists with the antiferroelectric phase. Here, the authors realize a threefold-modulated ferrielectric phase regulated by strain-mediated phase separation in PbZrO3 thin film.
- Ziyi Yu
- , Ningbo Fan
- & Fangfang Xu
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Article
| Open AccessDualistic insulator states in 1T-TaS2 crystals
While monolayer of 1T-TaS2 is considered to be a Mott insulator, the nature of the bulk insulating state is debated. Here the authors introduce a ladder-type structures with fractional misalignment of adjacent layers, showing that it becomes a Mott insulator due to decoupling between the layers.
- Yihao Wang
- , Zhihao Li
- & Liang Cao
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| Open AccessAtomic-scale observation of localized phonons at FeSe/SrTiO3 interface
The authors characterize the phonon modes at the FeSe/SrTiO3 interface with atomically resolved electron energy loss spectroscopy and correlate them with accurate atomic structure in an electron microscope. They find several phonon modes highly localized at the interface, one of which engages in strong interactions with the electrons in FeSe.
- Ruochen Shi
- , Qize Li
- & Peng Gao
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Article
| Open AccessMeasuring statistics-induced entanglement entropy with a Hong–Ou–Mandel interferometer
Measuring quantum entanglement remains a demanding task. The authors introduce two functions to quantify entanglement induced by fermionic or bosonic statistics, in transport experiments. Both functions, in theory and experiment, are remarkably resilient against the nonuniversal effects of interactions.
- Gu Zhang
- , Changki Hong
- & Yuval Gefen
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Article
| Open AccessFabrication-induced even-odd discrepancy of magnetotransport in few-layer MnBi2Te4
MnBi2Te4 is an antiferromagnetic topological insulator. This combination of magnetic ordering and topological properties has resulted in intense interest, however, like many van der Waals materials, experimental results are hampered by fabrication difficulties. Here, Li, Wang, Lian et al. show that the fabrication process itself can result in mismatched thickness dependence of magneto-transport measurements. ‘
- Yaoxin Li
- , Yongchao Wang
- & Chang Liu
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| Open AccessAtomic-scale visualization of the interlayer Rydberg exciton complex in moiré heterostructures
Recently, Rydberg excitons have been demonstrated in transition metal dichalcogenide moire superlattices. Here, using atomic-scale imaging, the authors observe Rydberg structure and moire periodicity of ground-state interlayer excitons in a monolayer YbCl3 on highly oriented pyrolytic graphite.
- Meng Zhao
- , Zhongjie Wang
- & Chunlei Gao
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Article
| Open AccessStable skyrmion bundles at room temperature and zero magnetic field in a chiral magnet
Manipulation of topological charge at room temperature is a key tenet of skyrmionics. Here, the authors demonstrate tunable topological charges in skyrmion bundles at room temperature and zero magnetic field.
- Yongsen Zhang
- , Jin Tang
- & Haifeng Du
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Article
| Open AccessOrphan high field superconductivity in non-superconducting uranium ditelluride
In addition to its low-field superconducting state, UTe2 features a re-entrant superconducting state when high magnetic fields are applied at a particular range of angles. Here, the authors demonstrate that the high-field re-entrant superconducting state survives even when the low-field superconducting state is destroyed by disorder.
- Corey E. Frank
- , Sylvia K. Lewin
- & Nicholas P. Butch
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Article
| Open AccessElectronic inhomogeneity and phase fluctuation in one-unit-cell FeSe films
The authors study monolayer FeSe via scanning tunneling microscopy and simultaneous micron-scale-probe-based transport. They observe distinct superconducting phases in domains and on boundaries between domains, with different superconducting gaps and pairing temperatures.
- Dapeng Zhao
- , Wenqiang Cui
- & Qi-Kun Xue
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Article
| Open AccessIron alloys of volatile elements in the deep Earth’s interior
Many volatile elements are depleted in the bulk silicate Earth. Here, the authors found that these volatile elements tend to react with Fe under pressure and may be sequestered within Earth’s core by forming substitutional Fe alloys.
- Yifan Tian
- , Peiyu Zhang
- & Hanyu Liu
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Article
| Open AccessExciton polariton condensation from bound states in the continuum at room temperature
Bound states in continuum have attracted attention in various platforms, and recently condensation of bound states in continuum polariton modes was demonstrated at low temperatures. Here the authors report the observation of such a state in a periodic air-hole perovskite-based photonic crystal at room temperature.
- Xianxin Wu
- , Shuai Zhang
- & Xinfeng Liu
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Article
| Open AccessRe-order parameter of interacting thermodynamic magnets
Phase diagrams of materials are typically based on a static order parameter, but it faces challenges when distinguishing subtle phase changes, such as re-ordering. Here the authors introduce a dynamic re-order parameter, in particular magnons, and illustrate it in a material with complex magnetic phases.
- Byung Cheol Park
- , Howon Lee
- & Taewoo Ha
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| Open AccessDefect scattering can lead to enhanced phonon transport at nanoscale
Defects in materials are well known to suppress thermal transport. Here, the authors demonstrate that introducing defects in nanoscale heating zone enhances thermal conductance by up to 75% through reducing directional phonon nonequilibrium.
- Yue Hu
- , Jiaxuan Xu
- & Hua Bao
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Article
| Open AccessInterface-induced dual-pinning mechanism enhances low-frequency electromagnetic wave loss
This paper proposes a dual-pinning mechanism induced by a magneto-electric bias interface and uses it to designs a double-layer core-shell structure, demonstrating that the mechanism improves electromagnetic wave absorption in the low-frequency bands.
- Bo Cai
- , Lu Zhou
- & Guang-Sheng Wang
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Article
| Open AccessCorrelation-driven nonequilibrium exciton site transition in a WSe2/WS2 moiré supercell
Correlated insulator states of moire excitons in transition metal dichalcogenide heterostructures have attracted significant attention recently. Here the authors use time-resolved pump-probe spectroscopy to demonstrate the effects of non-equilibrium correlations of moire excitons in WSe2/WS2 heterobilayers.
- Jinjae Kim
- , Jiwon Park
- & Hyunyong Choi
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Article
| Open AccessUsing strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa2Cu3Oy
Strain is a valuable tuning knob for studying the electronic properties of quantum materials. Here, the authors use strain to modulate and study the competition between 2D and 3D charge orders in a high-temperature superconductor.
- I. Vinograd
- , S. M. Souliou
- & M. Le Tacon
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| Open AccessDistinct skyrmion phases at room temperature in two-dimensional ferromagnet Fe3GaTe2
Most 2D magnets support only a single skyrmion phase. Here, the authors observe two distinct topological phases: Bloch and hybrid skyrmions, with high thermostability in the room-temperature ferromagnet Fe3GaTe2.
- Xiaowei Lv
- , Hualiang Lv
- & Renchao Che
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Article
| Open AccessHighly efficient field-free switching of perpendicular yttrium iron garnet with collinear spin current
Field-free switching of the perpendicular yttrium iron garnet magnetization with considerable efficiency is desired for device performance. Here, the authors demonstrate such an accomplishment with a collinear spin current in Py.
- Man Yang
- , Liang Sun
- & Haifeng Ding
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Article
| Open AccessMotility-induced coexistence of a hot liquid and a cold gas
Inertial active matter can self-organize into coexisting phases that feature different temperatures, but experimental realizations are limited. Here, the authors report the coexistence of hot liquid and cold gas states in mixtures of overdamped active and inertial passive Brownian particles, giving a broader relevance.
- Lukas Hecht
- , Iris Dong
- & Benno Liebchen
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| Open AccessExtreme terahertz magnon multiplication induced by resonant magnetic pulse pairs
The authors demonstrate high-order terahertz nonlinear magnonics using two-dimensional coherent spectroscopy, revealing the emergence of seventh-order spin-wave mixing and sixth harmonic magnon generation within an antiferromagnetic orthoferrite.
- C. Huang
- , L. Luo
- & J. Wang
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Article
| Open AccessMetavalently bonded tellurides: the essence of improved thermoelectric performance in elemental Te
Doping is a common strategy to improve thermoelectric performance yet limited to the solid solubility of dopants. Here, the authors find that forming metavalently bonded precipitates is key to property enhancement in Te rather than modifying the matrix lattice.
- Decheng An
- , Senhao Zhang
- & Yuan Yu
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Article
| Open AccessViolation of emergent rotational symmetry in the hexagonal Kagome superconductor CsV
3 Sb5 Superconductors with hexagonal symmetry are expected to be isotropic particularly near the critical temperature Tc, a property called emergent rotational symmetry (ERS). Here, the authors use calorimetry to study the hexagonal kagome superconductor CsV3Sb5 and find a violation of the expected ERS, hinting at realization of exotic superconductivity.
- Kazumi Fukushima
- , Keito Obata
- & Shingo Yonezawa
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Article
| Open AccessProbing the tunable multi-cone band structure in Bernal bilayer graphene
Bernal-stacked bilayer graphene (BLG) has been extensively studied due to its tunable band gap and emerging electronic properties, but its low-energy band structure remains debated. Here, the authors report magnetotransport measurements of Bernal BLG, showing evidence of four Dirac cones and electrically induced topological transitions.
- Anna M. Seiler
- , Nils Jacobsen
- & R. Thomas Weitz
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| Open AccessControlled condensation by liquid contact-induced adaptations of molecular conformations in self-assembled monolayers
Surface condensation is predetermined and is typically adjusted by chemical or topographical surface modification. Here, the authors report on a strategy to control the surface condensation behavior by adjusting molecular conformations in self-assembled monolayers.
- Guoying Bai
- , Haiyan Zhang
- & Yufeng Liu
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Article
| Open AccessImpact of molecular symmetry on crystallization pathways in highly supersaturated KH2PO4 solutions
The molecular symmetry of solute structure in aqueous solutions is a key clue to understand Ostwald’s step rule. Here, the authors show that molecular symmetry and its structural evolution can govern the crystallization pathways in aqueous solutions.
- Yong Chan Cho
- , Sooheyong Lee
- & Geun Woo Lee
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Article
| Open AccessThe nature of non-phononic excitations in disordered systems
The frequency scaling exponent of low-frequency vibrational excitations in glasses remains controversial in the literature. Here, Schirmacher et al. show that the exponent depends on the statistics of the small values of the local stresses, which is governed by the detail of interaction potential.
- Walter Schirmacher
- , Matteo Paoluzzi
- & Giancarlo Ruocco
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Article
| Open AccessGiant Faraday rotation in atomically thin semiconductors
Here, the authors perform Faraday rotation spectroscopy around the excitonic transitions in hBN-encapsulated WSe2 and MoSe2 monolayers, and interlayer excitons in MoS2 bilayers. They measure a large Verdet constant - 1.9 × 107 deg T−¹cm−¹ for monolayers, and attribute it to the giant oscillator strength and high g-factor of the excitons.
- Benjamin Carey
- , Nils Kolja Wessling
- & Ashish Arora
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Article
| Open AccessAnderson critical metal phase in trivial states protected by average magnetic crystalline symmetry
The authors identify a novel delocalization mechanism for topologically trivial obstructed insulators. In transitioning from two topologically trivial states, where one would expect Anderson’s localization to take place, a delocalized ‘critical metal phase’ appears.
- Fa-Jie Wang
- , Zhen-Yu Xiao
- & Zhi-Da Song
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Article
| Open AccessThree-dimensional spin-wave dynamics, localization and interference in a synthetic antiferromagnet
The techniques we typically employ to study spin-waves in magnetic materials, such as Brillouin Light Scattering, are two-dimensional. Spin waves, however, are manifestly three-dimensional. Here, Girardi et al. succeed in such three-dimensional imaging of spin waves in a synthetic antiferromagnet using Time-Resolved Soft X-ray Laminography.
- Davide Girardi
- , Simone Finizio
- & Edoardo Albisetti
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Article
| Open AccessLayer-by-layer phase transformation in Ti3O5 revealed by machine-learning molecular dynamics simulations
Reconstructive phase transitions in materials are usually slow due to large activation energy barriers. Here, the authors show a kinetically favorable layer-by-layer mechanism in Ti3O5 transformations using machine-learning molecular dynamics simulations.
- Mingfeng Liu
- , Jiantao Wang
- & Xing-Qiu Chen
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Article
| Open AccessNonlinear optical diode effect in a magnetic Weyl semimetal
Here the authors demonstrate a broadband nonlinear optical diode effect and its electric control in the magnetic Weyl semimetal CeAlSi. Their findings advance ongoing research to identify novel optical phenomena in topological materials.
- Christian Tzschaschel
- , Jian-Xiang Qiu
- & Su-Yang Xu
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Article
| Open AccessFerrielectricity controlled widely-tunable magnetoelectric coupling in van der Waals multiferroics
Two-dimensional multiferroics with effective magnetoelectric coupling has not been realized. Here, the authors find a magnetoelectric coupling mechanism in two-dimensional CuCrP2S6 interlocked with heterogeneous ferrielectric state.
- Qifeng Hu
- , Yuqiang Huang
- & Yi Zheng
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Article
| Open AccessExciton engineering of 2D Ruddlesden–Popper perovskites by synergistically tuning the intra and interlayer structures
Guo et al. report enhanced emission and photoconductivity in 2D Ruddlesden-Popper perovskites by synergistically tuning the intra and interlayer structure via pressure. A structure descriptor considering both intra- and interlayer is then introduced for screening perovskite with desired properties.
- Songhao Guo
- , Willa Mihalyi-Koch
- & Xujie Lü
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Article
| Open AccessPushing thermal conductivity to its lower limit in crystals with simple structures
The pursuit of materials with low heat conductivity is vital for numerous applications. Here, the authors find AgTlI2 show low heat conductivity of 0.25 W/mK at room temperature, discussing its thermal transport mechanisms.
- Zezhu Zeng
- , Xingchen Shen
- & Yue Chen
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Article
| Open AccessAsymmetric magnetization switching and programmable complete Boolean logic enabled by long-range intralayer Dzyaloshinskii-Moriya interaction
The authors find a magnetization switching mechanism and the long-range intralayer Dzyaloshinskii-Moriya interaction effect, which enables asymmetric magnetization switching and complete Boolean logic operations.
- Qianbiao Liu
- , Long Liu
- & Lijun Zhu
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Article
| Open AccessEmissive brightening in molecular graphene nanoribbons by twilight states
The authors demonstrate that the band structure of graphene nanoribbons is modulated by cove edges, brightening the luminescence 4-fold via emission from otherwise dark twilight states. High spectral resolution of the optical response reveals strong vibron-electron coupling
- Bernd K. Sturdza
- , Fanmiao Kong
- & Robin J. Nicholas
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Article
| Open AccessLight-induced giant enhancement of nonreciprocal transport at KTaO3-based interfaces
Optical control is an alternative pathway to boost nonlinear transport in noncentrosymmetric systems. Here, the authors observe a light-induced giant enhancement of nonreciprocal transport coefficient as high as 105 A−1 T−1 at KTaO3-based Rashba interfaces.
- Xu Zhang
- , Tongshuai Zhu
- & Xuefeng Wang
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Article
| Open AccessHidden non-collinear spin-order induced topological surface states
Several recent experimental studies have found disconnected Fermi surface arcs emerging below the Neel temperature in several rare-earth mono-pnictides. While these electronic states have been attributed to a non-collinear antiferromagnetic order, experimental evidence of this has been lacking. Here Huang et al demonstrate the emergence of non-collinear antiferromagnetic order using spin-polarized scanning tunnelling microscopy.
- Zengle Huang
- , Hemian Yi
- & Weida Wu
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Article
| Open AccessObservation of Kekulé vortices around hydrogen adatoms in graphene
Kekulé vortices in hexagonal lattices can host fractionalized charges at zero magnetic field, but have remained out of experimental reach. Here, the authors report a Kekulé vortex in the local density states of graphene around a chemisorbed hydrogen adatom.
- Yifei Guan
- , Clement Dutreix
- & Vincent T. Renard
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Article
| Open AccessSwitching the spin cycloid in BiFeO3 with an electric field
Previous understanding of the coupling between ferroelectric structure and magnetic texture in BiFeO3 has relied on mesoscale measurements. Here, the authors image coupling directly, showing a complex spin cycloid controlled with electric field.
- Peter Meisenheimer
- , Guy Moore
- & Ramamoorthy Ramesh
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Article
| Open AccessIntrinsic exchange biased anomalous Hall effect in an uncompensated antiferromagnet MnBi2Te4
Exchange bias occurs in a variety of magnetic materials and heterostructures. The quintessential example occurs in antiferromagnetic/ferromagnetic heterostructures and has been employed extensively in magnetic memory devices. Here, via a specific field training protocol, the authors demonstrate an exchange bias of up to 400mT in odd layered MnBi2Te4.
- Su Kong Chong
- , Yang Cheng
- & Kang L. Wang
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Article
| Open AccessEnhanced polarization switching characteristics of HfO2 ultrathin films via acceptor-donor co-doping
Ferroelectric HfO2 is faced with an oxygen vacancy dilemma, which favors the polar phase but harm to switching behaviors. Here, the authors propose a donor-acceptor co-doping method to enhance polarization switching characteristics of the HfO2 films.
- Chao Zhou
- , Liyang Ma
- & Zuhuang Chen
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Article
| Open AccessShaping active matter from crystalline solids to active turbulence
Earlier research has shown that controlling activity in the active matter can lead to either a phase change or a laminar-turbulent transition in active fluids. Authors demonstrate that it is possible to control both the phase transitions between solid, liquid, and gas states and the laminar-to-turbulent transitions in fluid phases by adjusting the activity of a phoretic medium.
- Qianhong Yang
- , Maoqiang Jiang
- & Lailai Zhu
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Article
| Open AccessEnhancement of electrocatalysis through magnetic field effects on mass transport
Magnetic fields can enhance electrocatalysis, yet its effect on mass transport has been overlooked. Here, the authors track the motion induced on the electrolyte ions, demonstrating that mass transport effects can double the catalyst activity with low reactant availability, as in oxygen reduction.
- Priscila Vensaus
- , Yunchang Liang
- & Magalí Lingenfelder
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Article
| Open AccessThree-stage ultrafast demagnetization dynamics in a monolayer ferromagnet
Ultrafast demagnetization refers to the process where an intense optical drive can destroy the magnetic order in a magnetic material on a femto-second timescale. Here, Wu et al resolve a three-stage ultrafast demagnetization process in a monolayer of Fe3GeTe2.
- Na Wu
- , Shengjie Zhang
- & Sheng Meng
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Article
| Open AccessMagnetic field filtering of the boundary supercurrent in unconventional metal NiTe2-based Josephson junctions
The authors study Josephson junctions where the weak link is a NiTe2 flake. They find that in-plane magnetic field in a particular direction causes the supercurrent to concentrate in the edges of the flake, excluding the bulk. They further argue that the supercurrent is carried by higher-order hinge states.
- Tian Le
- , Ruihan Zhang
- & Fanming Qu
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