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News & Views |
Flat bands find another dimension for exotic physical phases
Experiments reveal flat bands in the relationship between the energy and the momentum of electrons in a 3D solid. Such behaviour is indicative of unusual physical phenomena, and has previously been seen only in 2D materials.
- Xingjiang Zhou
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Article |
Three-dimensional flat bands in pyrochlore metal CaNi2
Angle-resolved photoemission spectroscopy of CaNi2 shows a band with vanishing dispersion across the full 3D Brillouin zone that is identified with the pyrochlore flat band as well as two additional flat bands that arise from multi-orbital interference of Ni d-electrons.
- Joshua P. Wakefield
- , Mingu Kang
- & Joseph G. Checkelsky
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Article |
Dipolar quantum solids emerging in a Hubbard quantum simulator
The realization of dipolar quantum solids with an ultracold gas of magnetic atoms in an optical lattice ushers in quantum simulation of many-body systems with long-range anisotropic interactions.
- Lin Su
- , Alexander Douglas
- & Markus Greiner
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Article |
Remarkable heat conduction mediated by non-equilibrium phonon polaritons
Measurements of thermal transport along 3C-SiC nanowires with and without a gold coating on the end(s) suggest that thermally excited surface phonon polaritons can be used in nanostructures to substantially enhance thermal conductivity.
- Zhiliang Pan
- , Guanyu Lu
- & Deyu Li
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Article |
Cavity-mediated thermal control of metal-to-insulator transition in 1T-TaS2
Cavity-mediated thermal control of metal-to-insulator transition is achieved by embedding the charge density wave material 1T-TaS2 into cryogenic tunable terahertz cavities.
- Giacomo Jarc
- , Shahla Yasmin Mathengattil
- & Daniele Fausti
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Article |
Orbital multiferroicity in pentalayer rhombohedral graphene
Orbital multiferroicity reported in pentalayer rhombohedral graphene features ferro-orbital-magnetism and ferro-valleytricity, both of which can be controlled by an electric field.
- Tonghang Han
- , Zhengguang Lu
- & Long Ju
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News & Views |
The twisted material that splits the electron
Layers of a thin semiconductor material overlap in a particular pattern, giving rise to particle currents carrying a fraction of the charge of an electron — with potential for encoding quantum information.
- Cécile Repellin
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News & Views |
Nickelates join the club of high-temperature superconductors
A nickel-based compound has shown evidence of a superconducting state at a temperature of 80 kelvin. The material bridges a gap between other nickelates and a notable class of superconductor containing copper.
- Matthias Hepting
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Article |
Adsorbate motors for unidirectional translation and transport
An adsorbate motor that moves unidirectionally on a copper surface is achieved by inducing intramolecular hydrogen transfer in a single molecule.
- Grant J. Simpson
- , Mats Persson
- & Leonhard Grill
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News |
How would room-temperature superconductors change science?
The prized materials could be transformative for research — but only if they have other essential qualities.
- Davide Castelvecchi
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Article |
Observation of fractionally quantized anomalous Hall effect
Transport measurements in twisted bilayer MoTe2 reveal quantized Hall resistance plateaus and composite Fermi liquid-like behaviour under zero magnetic field, constituting a direct observation of integer and fractional quantum anomalous Hall effects.
- Heonjoon Park
- , Jiaqi Cai
- & Xiaodong Xu
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Article
| Open AccessProximity superconductivity in atom-by-atom crafted quantum dots
Proximity-induced superconductivity on a single spin-degenerate quantum level of a surface state confined in a quantum corral on a superconducting substrate built atom by atom by a scanning tunnelling microscope is investigated.
- Lucas Schneider
- , Khai That Ton
- & Jens Wiebe
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Article |
Quantum textures of the many-body wavefunctions in magic-angle graphene
High-resolution scanning tunnelling microscopy is used to observe the quantum textures of the many-body wavefunctions of the correlated insulating, pseudogap and superconducting phases in magic-angle graphene.
- Kevin P. Nuckolls
- , Ryan L. Lee
- & Ali Yazdani
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Article |
Magneto-optics in a van der Waals magnet tuned by self-hybridized polaritons
In the layered magnetic semiconductor CrSBr, emergent light–matter hybrids (polaritons) increase the spectral bandwidth of correlations between the magnetic, electronic and optical properties, enabling largely tunable optical responses to applied magnetic fields and magnons.
- Florian Dirnberger
- , Jiamin Quan
- & Vinod M. Menon
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Article |
Microstructure and crystal order during freezing of supercooled water drops
Optical microscopy and X-ray diffraction are used to study the freezing of water droplets in vacuum, leading to the development of a seven-stage model of freezing and the mapping of ice structures and crystal order.
- Armin Kalita
- , Maximillian Mrozek-McCourt
- & Claudiu A. Stan
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Article
| Open AccessReversible spin-optical interface in luminescent organic radicals
We report organic molecules showing both efficient luminescence and near-unity generation yield of excited states with high spin multiplicity, simultaneously supporting a high efficiency of initialization, spin manipulations and light-based readout at room temperature.
- Sebastian Gorgon
- , Kuo Lv
- & Emrys W. Evans
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Article
| Open AccessPines’ demon observed as a 3D acoustic plasmon in Sr2RuO4
Evidence is presented for a Pines’ demon as a three-dimensional acoustic plasmon in the multiband metal Sr2RuO4 from momentum-resolved electron energy-loss spectroscopy using a collimated, defocused beam with high momentum resolution.
- Ali A. Husain
- , Edwin W. Huang
- & Peter Abbamonte
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Research Briefing |
Emergent ferromagnetic states revealed in a geometrically frustrated triangular lattice
The ordering of magnetic moments in a strongly correlated system depends on the lattice they inhabit, with triangular lattices yielding exotic phases through an effect called geometrical frustration. Experiments demonstrate that ultracold atoms in such lattices show frustration and, surprisingly, display an ordering called ferromagnetism when mobile charges are present.
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Article |
Quantum oscillations of the quasiparticle lifetime in a metal
Quantum oscillations in the three-dimensional topological semimetal CoSi are reported, where selected oscillation frequencies have no corresponding extremal Fermi surface cross-sections, representing instead oscillations of the quasiparticle lifetime.
- Nico Huber
- , Valentin Leeb
- & Marc A. Wilde
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Article |
Frustration- and doping-induced magnetism in a Fermi–Hubbard simulator
The magnetic phases of the geometrically frustrated triangular lattice Hubbard model are directly investigated using ultracold fermionic atoms, indicating a possible transition to ferromagnetism at a filling of 1.2.
- Muqing Xu
- , Lev Haldar Kendrick
- & Markus Greiner
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Article |
Spin-mediated shear oscillators in a van der Waals antiferromagnet
Using several ultrafast diffraction and microscopy techniques, demagnetization-driven interlayer shear of a van der Waals antiferromagnet is visualized at the nanoscale.
- Alfred Zong
- , Qi Zhang
- & Haidan Wen
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Article |
Thermodynamic evidence of fractional Chern insulator in moiré MoTe2
Thermodynamic evidence of both integer and fractional Chern insulators at zero magnetic field is reported in small-angle twisted bilayer MoTe2 by combining the local electronic compressibility and magneto-optical measurements.
- Yihang Zeng
- , Zhengchao Xia
- & Jie Shan
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Article |
Universal equation of state for wave turbulence in a quantum gas
Equilibrium-like state variables, related by an equation of state, are identified in a study of turbulent cascade of matter waves in a far-from-equilibrium ultracold atomic Bose gas.
- Lena H. Dogra
- , Gevorg Martirosyan
- & Zoran Hadzibabic
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Matters Arising |
Reply to: Dilemma in optical identification of single-layer multiferroics
- Qian Song
- , Connor A. Occhialini
- & Riccardo Comin
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Matters Arising |
Dilemma in optical identification of single-layer multiferroics
- Yucheng Jiang
- , Yangliu Wu
- & Cheng-Wei Qiu
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Article |
Superconductivity and strong interactions in a tunable moiré quasicrystal
A moiré quasicrystal constructed by twisting three layers of graphene with two different twist angles shows high tunability between a periodic-like regime at low energies and a strongly quasiperiodic regime at higher energies alongside strong interactions and superconductivity.
- Aviram Uri
- , Sergio C. de la Barrera
- & Pablo Jarillo-Herrero
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Article
| Open AccessMixing of moiré-surface and bulk states in graphite
The electronic states in three-dimensional crystals such as graphite can be tuned by a superlattice potential occurring at the interface with crystallographically aligned hexagonal boron nitride.
- Ciaran Mullan
- , Sergey Slizovskiy
- & Artem Mishchenko
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Article |
Mixed-dimensional moiré systems of twisted graphitic thin films
Transport measurements of dual-gated devices constructed by slightly rotating a monolayer graphene sheet atop a thin bulk graphite crystal are performed, showing that moiré potential transforms the electronic properties of an entire graphitic thin film.
- Dacen Waters
- , Ellis Thompson
- & Matthew Yankowitz
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Article |
Linear-in-temperature resistivity for optimally superconducting (Nd,Sr)NiO2
By moving to a substrate that better stabilizes conditions, the doping series of Nd1–xSrxNiO2 is synthesized free from extended defects, resulting in enhancement of superconductivity in terms of transition temperature and range of doping.
- Kyuho Lee
- , Bai Yang Wang
- & Harold Y. Hwang
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Article |
Signatures of superconductivity near 80 K in a nickelate under high pressure
Signatures of superconductivity in single crystals of La3Ni2O7 were observed at a maximum transition temperature of 80 K at pressures between 14.0 GPa and 43.5 GPa.
- Hualei Sun
- , Mengwu Huo
- & Meng Wang
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News & Views |
First light on orbitronics as a viable alternative to electronics
An effect that transfers information using the rotational motion of electrons has been detected with light, forging a path towards technologies that are cheaper — and less harmful to the environment — than existing electronics.
- Tatiana G. Rappoport
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Article |
Observation of the orbital Hall effect in a light metal Ti
The orbital Hall effect is observed in the light metal titanium, confirming the orbital Hall effect and indicating that orbital angular momentum is an important degree of freedom in solids.
- Young-Gwan Choi
- , Daegeun Jo
- & Hyun-Woo Lee
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Article |
Quantum-metric-induced nonlinear transport in a topological antiferromagnet
Quantum-metric-induced nonlinear transport, including the nonlinear anomalous Hall effect and a diode-like response, is observed in thin films of a topological antiferromagnet, providing a means to design magnetic nonlinear devices.
- Naizhou Wang
- , Daniel Kaplan
- & Weibo Gao
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Article
| Open AccessDetection of a pair density wave state in UTe2
A spin-triplet pair density wave is discovered in the candidate topological superconductor UTe2 using superconductive scanning tunnelling microscopy tips.
- Qiangqiang Gu
- , Joseph P. Carroll
- & Xiaolong Liu
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News & Views |
Widespread pair density waves spark superconductor search
Periodic waves of changing electron density are linked to the ability of some materials to conduct electricity without resistance. Four studies reveal that such waves could emerge in more materials than expected.
- Hui Chen
- & Hong-Jun Gao
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Article |
Pair density wave state in a monolayer high-Tc iron-based superconductor
The primary pair density wave state has been discovered in a monolayer iron-based high-Tc superconductor, providing a platform to study the interplay between the correlated electronic states and unconventional Cooper pairing in high-Tc superconductors.
- Yanzhao Liu
- , Tianheng Wei
- & Jian Wang
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Article |
Smectic pair-density-wave order in EuRbFe4As4
Measurements show that smectic pair-density-wave order exists in the magnetic iron pnictide superconductor EuRbFe4As4 and that the pair-density-wave state is a primary, zero-field superconducting state in this compound.
- He Zhao
- , Raymond Blackwell
- & Kazuhiro Fujita
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Article |
Magnetic-field-sensitive charge density waves in the superconductor UTe2
A study using scanning tunnelling microscopy reveals a charge-density-wave state that is sensitive to magnetic fields and strongly intertwined with superconductivity in the heavy-fermion triplet superconductor UTe2.
- Anuva Aishwarya
- , Julian May-Mann
- & Vidya Madhavan
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Review Article |
A second wave of topological phenomena in photonics and acoustics
The current state of the art of topological phenomena in photonics and acoustics is reviewed and future research directions for valuable applications are discussed.
- Xiujuan Zhang
- , Farzad Zangeneh-Nejad
- & Johan Christensen
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Article |
Excitonic topological order in imbalanced electron–hole bilayers
This study reports an excitonic topological order emerging in imbalanced electron–hole bilayers.
- Rui Wang
- , Tigran A. Sedrakyan
- & Rui-Rui Du
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Article |
Signatures of fractional quantum anomalous Hall states in twisted MoTe2
Signatures of fractional quantum anomalous Hall states at zero magnetic field are observed in a fractionally filled moiré superlattice in a molybdenum ditelluride twisted bilayer.
- Jiaqi Cai
- , Eric Anderson
- & Xiaodong Xu
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Article |
Non-orientable order and non-commutative response in frustrated metamaterials
We describe globally frustrated matter as deformations of non-orientable surfaces, with the concept of non-orientable order we demonstrate topologically protected mechanical memories, suggesting a design principle for effectively storing information in frustrated metamaterials.
- Xiaofei Guo
- , Marcelo Guzmán
- & Corentin Coulais
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Article
| Open AccessChiral phonons in quartz probed by X-rays
Our experimental proof of chiral phonons demonstrates a degree of freedom in condensed matter that is of fundamental importance and opens the door to exploration of emergent phenomena based on chiral bosons.
- Hiroki Ueda
- , Mirian García-Fernández
- & Urs Staub
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Article |
Orbital Fulde–Ferrell–Larkin–Ovchinnikov state in an Ising superconductor
The discovery of an orbital Fulde–Ferrell–Larkin–Ovchinnikov state in the multilayer Ising superconductor 2H-NbSe2, in which the translational and rotational symmetries are broken, enables the preparation of such states in other materials with broken inversion symmetries.
- Puhua Wan
- , Oleksandr Zheliuk
- & Jianting Ye
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Article
| Open AccessDensity-wave ordering in a unitary Fermi gas with photon-mediated interactions
An experiment with atoms and photons provides a fully tunable and microscopically controllable platform for the experimental study of the interplay of superfluidity and density-wave order.
- Victor Helson
- , Timo Zwettler
- & Jean-Philippe Brantut
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Article
| Open AccessDynamic optical response of solids following 1-fs-scale photoinjection
Petahertz-scale optical-field metrology in a pump-probe setting enables the direct observation of how the optical properties of a medium evolve after 1-fs-scale photoinjection.
- Dmitry A. Zimin
- , Nicholas Karpowicz
- & Vladislav S. Yakovlev
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Article
| Open AccessAbsence of near-ambient superconductivity in LuH2±xNy
Nitrogen-doped lutetium hydrides LuH2±xNy synthesized using a high-pressure and high-temperature synthesis technique did not show near-ambient superconductivity at pressures below 40.1 GPa.
- Xue Ming
- , Ying-Jie Zhang
- & Hai-Hu Wen
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Article
| Open AccessNon-Abelian braiding of graph vertices in a superconducting processor
A unitary protocol for braiding projective non-Abelian Ising anyons in a generalized stabilizer code is implemented on a superconducting processor, allowing for verification of their fusion rules and realization of their exchange statistics.
- T. I. Andersen
- , Y. D. Lensky
- & P. Roushan
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Article
| Open AccessPhoto-induced high-temperature ferromagnetism in YTiO3
All-optical, mode-selective manipulation of the crystal lattice can be used to enhance and stabilize ferromagnetism in YTiO3 well above its equilibrium ordering temperature and for many nanoseconds, enabling dynamic engineering of practically useful non-equilibrium functionalities in fluctuating electronic systems.
- A. S. Disa
- , J. Curtis
- & A. Cavalleri
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